Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20171229' into staging

Queued TCG patches

# gpg: Signature made Fri 29 Dec 2017 20:44:06 GMT
# gpg:                using RSA key 0x64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-tcg-20171229:
  tcg: add cs_base and flags to -d exec output
  tcg: Allow 6 arguments to TCG helpers
  tcg: Add tcg_signed_cond
  tcg: Generalize TCGOp parameters
  tcg: Dynamically allocate TCGOps
  tcg: Remove TCGV_UNUSED* and TCGV_IS_UNUSED*
  target/moxie: Fix tlb_fill
  target/*helper: don't check retaddr before calling cpu_restore_state

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

45 files changed, 313 insertions, 397 deletions

diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 4452cd9..280200f 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -146,8 +146,10 @@ static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, TranslationBlock *itb)
     uint8_t *tb_ptr = itb->tc.ptr;
 
     qemu_log_mask_and_addr(CPU_LOG_EXEC, itb->pc,
-                           "Trace %p [%d: " TARGET_FMT_lx "] %s\n",
-                           itb->tc.ptr, cpu->cpu_index, itb->pc,
+                           "Trace %d: %p ["
+                           TARGET_FMT_lx "/" TARGET_FMT_lx "/%#x] %s\n",
+                           cpu->cpu_index, itb->tc.ptr,
+                           itb->cs_base, itb->pc, itb->flags,
                            lookup_symbol(itb->pc));
 
 #if defined(DEBUG_DISAS)
diff --git a/accel/tcg/tcg-runtime.c b/accel/tcg/tcg-runtime.c
index 4172ffd..d0d4484 100644
--- a/accel/tcg/tcg-runtime.c
+++ b/accel/tcg/tcg-runtime.c
@@ -156,8 +156,9 @@ void *HELPER(lookup_tb_ptr)(CPUArchState *env)
         return tcg_ctx->code_gen_epilogue;
     }
     qemu_log_mask_and_addr(CPU_LOG_EXEC, pc,
-                           "Chain %p [%d: " TARGET_FMT_lx "] %s\n",
-                           tb->tc.ptr, cpu->cpu_index, pc,
+                           "Chain %d: %p ["
+                           TARGET_FMT_lx "/" TARGET_FMT_lx "/%#x] %s\n",
+                           cpu->cpu_index, tb->tc.ptr, cs_base, pc, flags,
                            lookup_symbol(pc));
     return tb->tc.ptr;
 }
diff --git a/include/exec/gen-icount.h b/include/exec/gen-icount.h
index 049bba8..54aaa61 100644
--- a/include/exec/gen-icount.h
+++ b/include/exec/gen-icount.h
@@ -5,7 +5,7 @@
 
 /* Helpers for instruction counting code generation.  */
 
-static int icount_start_insn_idx;
+static TCGOp *icount_start_insn;
 
 static inline void gen_tb_start(TranslationBlock *tb)
 {
@@ -26,8 +26,8 @@ static inline void gen_tb_start(TranslationBlock *tb)
         /* We emit a movi with a dummy immediate argument. Keep the insn index
          * of the movi so that we later (when we know the actual insn count)
          * can update the immediate argument with the actual insn count.  */
-        icount_start_insn_idx = tcg_op_buf_count();
         tcg_gen_movi_i32(imm, 0xdeadbeef);
+        icount_start_insn = tcg_last_op();
 
         tcg_gen_sub_i32(count, count, imm);
         tcg_temp_free_i32(imm);
@@ -48,14 +48,11 @@ static inline void gen_tb_end(TranslationBlock *tb, int num_insns)
     if (tb_cflags(tb) & CF_USE_ICOUNT) {
         /* Update the num_insn immediate parameter now that we know
          * the actual insn count.  */
-        tcg_set_insn_param(icount_start_insn_idx, 1, num_insns);
+        tcg_set_insn_param(icount_start_insn, 1, num_insns);
     }
 
     gen_set_label(tcg_ctx->exitreq_label);
     tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_REQUESTED);
-
-    /* Terminate the linked list.  */
-    tcg_ctx->gen_op_buf[tcg_ctx->gen_op_buf[0].prev].next = 0;
 }
 
 static inline void gen_io_start(void)
diff --git a/include/exec/helper-gen.h b/include/exec/helper-gen.h
index 15204ab..22381a1 100644
--- a/include/exec/helper-gen.h
+++ b/include/exec/helper-gen.h
@@ -56,6 +56,16 @@ static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
   tcg_gen_callN(HELPER(name), dh_retvar(ret), 5, args);                 \
 }
 
+#define DEF_HELPER_FLAGS_6(name, flags, ret, t1, t2, t3, t4, t5, t6)    \
+static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
+    dh_arg_decl(t1, 1),  dh_arg_decl(t2, 2), dh_arg_decl(t3, 3),        \
+    dh_arg_decl(t4, 4), dh_arg_decl(t5, 5), dh_arg_decl(t6, 6))         \
+{                                                                       \
+  TCGTemp *args[6] = { dh_arg(t1, 1), dh_arg(t2, 2), dh_arg(t3, 3),     \
+                     dh_arg(t4, 4), dh_arg(t5, 5), dh_arg(t6, 6) };     \
+  tcg_gen_callN(HELPER(name), dh_retvar(ret), 6, args);                 \
+}
+
 #include "helper.h"
 #include "trace/generated-helpers.h"
 #include "trace/generated-helpers-wrappers.h"
@@ -67,6 +77,7 @@ static inline void glue(gen_helper_, name)(dh_retvar_decl(ret)          \
 #undef DEF_HELPER_FLAGS_3
 #undef DEF_HELPER_FLAGS_4
 #undef DEF_HELPER_FLAGS_5
+#undef DEF_HELPER_FLAGS_6
 #undef GEN_HELPER
 
 #endif /* HELPER_GEN_H */
diff --git a/include/exec/helper-head.h b/include/exec/helper-head.h
index 639eefd..e1fd08f 100644
--- a/include/exec/helper-head.h
+++ b/include/exec/helper-head.h
@@ -125,6 +125,8 @@
     DEF_HELPER_FLAGS_4(name, 0, ret, t1, t2, t3, t4)
 #define DEF_HELPER_5(name, ret, t1, t2, t3, t4, t5) \
     DEF_HELPER_FLAGS_5(name, 0, ret, t1, t2, t3, t4, t5)
+#define DEF_HELPER_6(name, ret, t1, t2, t3, t4, t5, t6) \
+    DEF_HELPER_FLAGS_6(name, 0, ret, t1, t2, t3, t4, t5, t6)
 
 /* MAX_OPC_PARAM_IARGS must be set to n if last entry is DEF_HELPER_FLAGS_n. */
 
diff --git a/include/exec/helper-proto.h b/include/exec/helper-proto.h
index 954bef8..74943ed 100644
--- a/include/exec/helper-proto.h
+++ b/include/exec/helper-proto.h
@@ -26,6 +26,10 @@ dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
 dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
                             dh_ctype(t4), dh_ctype(t5));
 
+#define DEF_HELPER_FLAGS_6(name, flags, ret, t1, t2, t3, t4, t5, t6) \
+dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
+                            dh_ctype(t4), dh_ctype(t5), dh_ctype(t6));
+
 #include "helper.h"
 #include "trace/generated-helpers.h"
 #include "tcg-runtime.h"
@@ -36,5 +40,6 @@ dh_ctype(ret) HELPER(name) (dh_ctype(t1), dh_ctype(t2), dh_ctype(t3), \
 #undef DEF_HELPER_FLAGS_3
 #undef DEF_HELPER_FLAGS_4
 #undef DEF_HELPER_FLAGS_5
+#undef DEF_HELPER_FLAGS_6
 
 #endif /* HELPER_PROTO_H */
diff --git a/include/exec/helper-tcg.h b/include/exec/helper-tcg.h
index b0c5baf..b3bdb0c 100644
--- a/include/exec/helper-tcg.h
+++ b/include/exec/helper-tcg.h
@@ -39,6 +39,12 @@
     | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
     | dh_sizemask(t5, 5) },
 
+#define DEF_HELPER_FLAGS_6(NAME, FLAGS, ret, t1, t2, t3, t4, t5, t6) \
+  { .func = HELPER(NAME), .name = str(NAME), .flags = FLAGS, \
+    .sizemask = dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
+    | dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
+    | dh_sizemask(t5, 5) | dh_sizemask(t6, 6) },
+
 #include "helper.h"
 #include "trace/generated-helpers.h"
 #include "tcg-runtime.h"
@@ -50,5 +56,6 @@
 #undef DEF_HELPER_FLAGS_3
 #undef DEF_HELPER_FLAGS_4
 #undef DEF_HELPER_FLAGS_5
+#undef DEF_HELPER_FLAGS_6
 
 #endif /* HELPER_TCG_H */
diff --git a/include/qemu/queue.h b/include/qemu/queue.h
index 35292c3..aa270d2 100644
--- a/include/qemu/queue.h
+++ b/include/qemu/queue.h
@@ -425,6 +425,11 @@ struct {                                                                \
                 (var);                                                  \
                 (var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)))
 
+#define QTAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, prev_var) \
+        for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last)); \
+             (var) && ((prev_var) = (*(((struct headname *)((var)->field.tqe_prev))->tqh_last)), 1); \
+             (var) = (prev_var))
+
 /*
  * Tail queue access methods.
  */
diff --git a/scripts/coccinelle/cpu_restore_state.cocci b/scripts/coccinelle/cpu_restore_state.cocci
new file mode 100644
index 0000000..61bc749
--- /dev/null
+++ b/scripts/coccinelle/cpu_restore_state.cocci
@@ -0,0 +1,19 @@
+// Remove unneeded tests before calling cpu_restore_state
+//
+// spatch --macro-file scripts/cocci-macro-file.h \
+//        --sp-file ./scripts/coccinelle/cpu_restore_state.cocci \
+//        --keep-comments --in-place --use-gitgrep --dir target
+@@
+expression A;
+expression C;
+@@
+-if (A) {
+     cpu_restore_state(C, A);
+-}
+@@
+expression A;
+expression C;
+@@
+- cpu_restore_state(C, A);
+- cpu_loop_exit(C);
++ cpu_loop_exit_restore(C, A);
diff --git a/target/alpha/mem_helper.c b/target/alpha/mem_helper.c
index 3c06baa..430eea4 100644
--- a/target/alpha/mem_helper.c
+++ b/target/alpha/mem_helper.c
@@ -34,9 +34,7 @@ void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
     uint64_t pc;
     uint32_t insn;
 
-    if (retaddr) {
-        cpu_restore_state(cs, retaddr);
-    }
+    cpu_restore_state(cs, retaddr);
 
     pc = env->pc;
     insn = cpu_ldl_code(env, pc);
@@ -58,9 +56,7 @@ void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
     AlphaCPU *cpu = ALPHA_CPU(cs);
     CPUAlphaState *env = &cpu->env;
 
-    if (retaddr) {
-        cpu_restore_state(cs, retaddr);
-    }
+    cpu_restore_state(cs, retaddr);
 
     env->trap_arg0 = addr;
     env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0;
@@ -80,11 +76,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = alpha_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret != 0)) {
-        if (retaddr) {
-            cpu_restore_state(cs, retaddr);
-        }
         /* Exception index and error code are already set */
-        cpu_loop_exit(cs);
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 #endif /* CONFIG_USER_ONLY */
diff --git a/target/alpha/translate.c b/target/alpha/translate.c
index 629f35e..73a1b5e 100644
--- a/target/alpha/translate.c
+++ b/target/alpha/translate.c
@@ -156,7 +156,7 @@ void alpha_translate_init(void)
 
 static TCGv load_zero(DisasContext *ctx)
 {
-    if (TCGV_IS_UNUSED_I64(ctx->zero)) {
+    if (!ctx->zero) {
         ctx->zero = tcg_const_i64(0);
     }
     return ctx->zero;
@@ -164,7 +164,7 @@ static TCGv load_zero(DisasContext *ctx)
 
 static TCGv dest_sink(DisasContext *ctx)
 {
-    if (TCGV_IS_UNUSED_I64(ctx->sink)) {
+    if (!ctx->sink) {
         ctx->sink = tcg_temp_new();
     }
     return ctx->sink;
@@ -172,18 +172,18 @@ static TCGv dest_sink(DisasContext *ctx)
 
 static void free_context_temps(DisasContext *ctx)
 {
-    if (!TCGV_IS_UNUSED_I64(ctx->sink)) {
+    if (ctx->sink) {
         tcg_gen_discard_i64(ctx->sink);
         tcg_temp_free(ctx->sink);
-        TCGV_UNUSED_I64(ctx->sink);
+        ctx->sink = NULL;
     }
-    if (!TCGV_IS_UNUSED_I64(ctx->zero)) {
+    if (ctx->zero) {
         tcg_temp_free(ctx->zero);
-        TCGV_UNUSED_I64(ctx->zero);
+        ctx->zero = NULL;
     }
-    if (!TCGV_IS_UNUSED_I64(ctx->lit)) {
+    if (ctx->lit) {
         tcg_temp_free(ctx->lit);
-        TCGV_UNUSED_I64(ctx->lit);
+        ctx->lit = NULL;
     }
 }
 
@@ -2948,9 +2948,9 @@ static int alpha_tr_init_disas_context(DisasContextBase *dcbase,
     /* Similarly for flush-to-zero.  */
     ctx->tb_ftz = -1;
 
-    TCGV_UNUSED_I64(ctx->zero);
-    TCGV_UNUSED_I64(ctx->sink);
-    TCGV_UNUSED_I64(ctx->lit);
+    ctx->zero = NULL;
+    ctx->sink = NULL;
+    ctx->lit = NULL;
 
     /* Bound the number of insns to execute to those left on the page.  */
     if (in_superpage(ctx, ctx->base.pc_first)) {
diff --git a/target/arm/op_helper.c b/target/arm/op_helper.c
index c2bb4f3..b362063 100644
--- a/target/arm/op_helper.c
+++ b/target/arm/op_helper.c
@@ -182,10 +182,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
     if (unlikely(ret)) {
         ARMCPU *cpu = ARM_CPU(cs);
 
-        if (retaddr) {
-            /* now we have a real cpu fault */
-            cpu_restore_state(cs, retaddr);
-        }
+        /* now we have a real cpu fault */
+        cpu_restore_state(cs, retaddr);
 
         deliver_fault(cpu, addr, access_type, mmu_idx, &fi);
     }
@@ -199,10 +197,8 @@ void arm_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr,
     ARMCPU *cpu = ARM_CPU(cs);
     ARMMMUFaultInfo fi = {};
 
-    if (retaddr) {
-        /* now we have a real cpu fault */
-        cpu_restore_state(cs, retaddr);
-    }
+    /* now we have a real cpu fault */
+    cpu_restore_state(cs, retaddr);
 
     fi.type = ARMFault_Alignment;
     deliver_fault(cpu, vaddr, access_type, mmu_idx, &fi);
@@ -221,10 +217,8 @@ void arm_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
     ARMCPU *cpu = ARM_CPU(cs);
     ARMMMUFaultInfo fi = {};
 
-    if (retaddr) {
-        /* now we have a real cpu fault */
-        cpu_restore_state(cs, retaddr);
-    }
+    /* now we have a real cpu fault */
+    cpu_restore_state(cs, retaddr);
 
     /* The EA bit in syndromes and fault status registers is an
      * IMPDEF classification of external aborts. ARM implementations
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 625ef2d..ba94f7d 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -405,10 +405,7 @@ static void unallocated_encoding(DisasContext *s)
 static void init_tmp_a64_array(DisasContext *s)
 {
 #ifdef CONFIG_DEBUG_TCG
-    int i;
-    for (i = 0; i < ARRAY_SIZE(s->tmp_a64); i++) {
-        TCGV_UNUSED_I64(s->tmp_a64[i]);
-    }
+    memset(s->tmp_a64, 0, sizeof(s->tmp_a64));
 #endif
     s->tmp_a64_count = 0;
 }
@@ -6276,7 +6273,7 @@ static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
             return;
         }
 
-        TCGV_UNUSED_PTR(fpst);
+        fpst = NULL;
         break;
     case 0xc: /* FMAXNMP */
     case 0xd: /* FADDP */
@@ -6371,7 +6368,7 @@ static void disas_simd_scalar_pairwise(DisasContext *s, uint32_t insn)
         tcg_temp_free_i32(tcg_res);
     }
 
-    if (!TCGV_IS_UNUSED_PTR(fpst)) {
+    if (fpst) {
         tcg_temp_free_ptr(fpst);
     }
 }
@@ -6387,7 +6384,7 @@ static void handle_shri_with_rndacc(TCGv_i64 tcg_res, TCGv_i64 tcg_src,
                                     bool is_u, int size, int shift)
 {
     bool extended_result = false;
-    bool round = !TCGV_IS_UNUSED_I64(tcg_rnd);
+    bool round = tcg_rnd != NULL;
     int ext_lshift = 0;
     TCGv_i64 tcg_src_hi;
 
@@ -6533,7 +6530,7 @@ static void handle_scalar_simd_shri(DisasContext *s,
         uint64_t round_const = 1ULL << (shift - 1);
         tcg_round = tcg_const_i64(round_const);
     } else {
-        TCGV_UNUSED_I64(tcg_round);
+        tcg_round = NULL;
     }
 
     tcg_rn = read_fp_dreg(s, rn);
@@ -6649,7 +6646,7 @@ static void handle_vec_simd_sqshrn(DisasContext *s, bool is_scalar, bool is_q,
         uint64_t round_const = 1ULL << (shift - 1);
         tcg_round = tcg_const_i64(round_const);
     } else {
-        TCGV_UNUSED_I64(tcg_round);
+        tcg_round = NULL;
     }
 
     for (i = 0; i < elements; i++) {
@@ -8239,8 +8236,8 @@ static void disas_simd_scalar_two_reg_misc(DisasContext *s, uint32_t insn)
         gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
         tcg_fpstatus = get_fpstatus_ptr();
     } else {
-        TCGV_UNUSED_I32(tcg_rmode);
-        TCGV_UNUSED_PTR(tcg_fpstatus);
+        tcg_rmode = NULL;
+        tcg_fpstatus = NULL;
     }
 
     if (size == 3) {
@@ -8360,7 +8357,7 @@ static void handle_vec_simd_shri(DisasContext *s, bool is_q, bool is_u,
         uint64_t round_const = 1ULL << (shift - 1);
         tcg_round = tcg_const_i64(round_const);
     } else {
-        TCGV_UNUSED_I64(tcg_round);
+        tcg_round = NULL;
     }
 
     for (i = 0; i < elements; i++) {
@@ -8502,7 +8499,7 @@ static void handle_vec_simd_shrn(DisasContext *s, bool is_q,
         uint64_t round_const = 1ULL << (shift - 1);
         tcg_round = tcg_const_i64(round_const);
     } else {
-        TCGV_UNUSED_I64(tcg_round);
+        tcg_round = NULL;
     }
 
     for (i = 0; i < elements; i++) {
@@ -9168,7 +9165,7 @@ static void handle_simd_3same_pair(DisasContext *s, int is_q, int u, int opcode,
     if (opcode >= 0x58) {
         fpst = get_fpstatus_ptr();
     } else {
-        TCGV_UNUSED_PTR(fpst);
+        fpst = NULL;
     }
 
     if (!fp_access_check(s)) {
@@ -9305,7 +9302,7 @@ static void handle_simd_3same_pair(DisasContext *s, int is_q, int u, int opcode,
         }
     }
 
-    if (!TCGV_IS_UNUSED_PTR(fpst)) {
+    if (fpst) {
         tcg_temp_free_ptr(fpst);
     }
 }
@@ -10226,13 +10223,13 @@ static void disas_simd_two_reg_misc(DisasContext *s, uint32_t insn)
     if (need_fpstatus) {
         tcg_fpstatus = get_fpstatus_ptr();
     } else {
-        TCGV_UNUSED_PTR(tcg_fpstatus);
+        tcg_fpstatus = NULL;
     }
     if (need_rmode) {
         tcg_rmode = tcg_const_i32(arm_rmode_to_sf(rmode));
         gen_helper_set_rmode(tcg_rmode, tcg_rmode, cpu_env);
     } else {
-        TCGV_UNUSED_I32(tcg_rmode);
+        tcg_rmode = NULL;
     }
 
     if (size == 3) {
@@ -10593,7 +10590,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
     if (is_fp) {
         fpst = get_fpstatus_ptr();
     } else {
-        TCGV_UNUSED_PTR(fpst);
+        fpst = NULL;
     }
 
     if (size == 3) {
@@ -10917,7 +10914,7 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
         }
     }
 
-    if (!TCGV_IS_UNUSED_PTR(fpst)) {
+    if (fpst) {
         tcg_temp_free_ptr(fpst);
     }
 }
@@ -11293,8 +11290,8 @@ static void aarch64_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
 {
     DisasContext *dc = container_of(dcbase, DisasContext, base);
 
-    dc->insn_start_idx = tcg_op_buf_count();
     tcg_gen_insn_start(dc->pc, 0, 0);
+    dc->insn_start = tcg_last_op();
 }
 
 static bool aarch64_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
diff --git a/target/arm/translate.c b/target/arm/translate.c
index e15192d..c690658 100644
--- a/target/arm/translate.c
+++ b/target/arm/translate.c
@@ -2169,8 +2169,8 @@ static int disas_iwmmxt_insn(DisasContext *s, uint32_t insn)
             tmp3 = tcg_const_i32((insn & 1) << 5);
             break;
         default:
-            TCGV_UNUSED_I32(tmp2);
-            TCGV_UNUSED_I32(tmp3);
+            tmp2 = NULL;
+            tmp3 = NULL;
         }
         gen_helper_iwmmxt_insr(cpu_M0, cpu_M0, tmp, tmp2, tmp3);
         tcg_temp_free_i32(tmp3);
@@ -4939,7 +4939,7 @@ static int disas_neon_ls_insn(DisasContext *s, uint32_t insn)
                         }
                     } else /* size == 0 */ {
                         if (load) {
-                            TCGV_UNUSED_I32(tmp2);
+                            tmp2 = NULL;
                             for (n = 0; n < 4; n++) {
                                 tmp = tcg_temp_new_i32();
                                 gen_aa32_ld8u(s, tmp, addr, get_mem_index(s));
@@ -6643,11 +6643,11 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                     tmp = neon_load_reg(rn, 1);
                     neon_store_scratch(2, tmp);
                 }
-                TCGV_UNUSED_I32(tmp3);
+                tmp3 = NULL;
                 for (pass = 0; pass < 2; pass++) {
                     if (src1_wide) {
                         neon_load_reg64(cpu_V0, rn + pass);
-                        TCGV_UNUSED_I32(tmp);
+                        tmp = NULL;
                     } else {
                         if (pass == 1 && rd == rn) {
                             tmp = neon_load_scratch(2);
@@ -6660,7 +6660,7 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                     }
                     if (src2_wide) {
                         neon_load_reg64(cpu_V1, rm + pass);
-                        TCGV_UNUSED_I32(tmp2);
+                        tmp2 = NULL;
                     } else {
                         if (pass == 1 && rd == rm) {
                             tmp2 = neon_load_scratch(2);
@@ -7078,7 +7078,7 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                     if (rm & 1) {
                         return 1;
                     }
-                    TCGV_UNUSED_I32(tmp2);
+                    tmp2 = NULL;
                     for (pass = 0; pass < 2; pass++) {
                         neon_load_reg64(cpu_V0, rm + pass);
                         tmp = tcg_temp_new_i32();
@@ -7217,7 +7217,7 @@ static int disas_neon_data_insn(DisasContext *s, uint32_t insn)
                         if (neon_2rm_is_float_op(op)) {
                             tcg_gen_ld_f32(cpu_F0s, cpu_env,
                                            neon_reg_offset(rm, pass));
-                            TCGV_UNUSED_I32(tmp);
+                            tmp = NULL;
                         } else {
                             tmp = neon_load_reg(rm, pass);
                         }
@@ -8666,7 +8666,7 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
             rn = (insn >> 16) & 0xf;
             tmp = load_reg(s, rn);
         } else {
-            TCGV_UNUSED_I32(tmp);
+            tmp = NULL;
         }
         rd = (insn >> 12) & 0xf;
         switch(op1) {
@@ -9505,7 +9505,7 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
 
                 /* compute total size */
                 loaded_base = 0;
-                TCGV_UNUSED_I32(loaded_var);
+                loaded_var = NULL;
                 n = 0;
                 for(i=0;i<16;i++) {
                     if (insn & (1 << i))
@@ -10074,7 +10074,7 @@ static int disas_thumb2_insn(DisasContext *s, uint32_t insn)
                     tcg_gen_addi_i32(addr, addr, -offset);
                 }
 
-                TCGV_UNUSED_I32(loaded_var);
+                loaded_var = NULL;
                 for (i = 0; i < 16; i++) {
                     if ((insn & (1 << i)) == 0)
                         continue;
@@ -11355,7 +11355,7 @@ static void disas_thumb_insn(DisasContext *s, uint32_t insn)
         } else if (op != 0xf) { /* mvn doesn't read its first operand */
             tmp = load_reg(s, rd);
         } else {
-            TCGV_UNUSED_I32(tmp);
+            tmp = NULL;
         }
 
         tmp2 = load_reg(s, rm);
@@ -11686,7 +11686,7 @@ static void disas_thumb_insn(DisasContext *s, uint32_t insn)
                     tcg_gen_addi_i32(addr, addr, 4);
                 }
             }
-            TCGV_UNUSED_I32(tmp);
+            tmp = NULL;
             if (insn & (1 << 8)) {
                 if (insn & (1 << 11)) {
                     /* pop pc */
@@ -11831,8 +11831,7 @@ static void disas_thumb_insn(DisasContext *s, uint32_t insn)
     case 12:
     {
         /* load/store multiple */
-        TCGv_i32 loaded_var;
-        TCGV_UNUSED_I32(loaded_var);
+        TCGv_i32 loaded_var = NULL;
         rn = (insn >> 8) & 0x7;
         addr = load_reg(s, rn);
         for (i = 0; i < 8; i++) {
@@ -12097,10 +12096,10 @@ static void arm_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu)
 {
     DisasContext *dc = container_of(dcbase, DisasContext, base);
 
-    dc->insn_start_idx = tcg_op_buf_count();
     tcg_gen_insn_start(dc->pc,
                        (dc->condexec_cond << 4) | (dc->condexec_mask >> 1),
                        0);
+    dc->insn_start = tcg_last_op();
 }
 
 static bool arm_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu,
diff --git a/target/arm/translate.h b/target/arm/translate.h
index 410ba79..cd7313a 100644
--- a/target/arm/translate.h
+++ b/target/arm/translate.h
@@ -66,8 +66,8 @@ typedef struct DisasContext {
     bool ss_same_el;
     /* Bottom two bits of XScale c15_cpar coprocessor access control reg */
     int c15_cpar;
-    /* TCG op index of the current insn_start.  */
-    int insn_start_idx;
+    /* TCG op of the current insn_start.  */
+    TCGOp *insn_start;
 #define TMP_A64_MAX 16
     int tmp_a64_count;
     TCGv_i64 tmp_a64[TMP_A64_MAX];
@@ -117,9 +117,9 @@ static void disas_set_insn_syndrome(DisasContext *s, uint32_t syn)
     syn >>= ARM_INSN_START_WORD2_SHIFT;
 
     /* We check and clear insn_start_idx to catch multiple updates.  */
-    assert(s->insn_start_idx != 0);
-    tcg_set_insn_param(s->insn_start_idx, 2, syn);
-    s->insn_start_idx = 0;
+    assert(s->insn_start != NULL);
+    tcg_set_insn_param(s->insn_start, 2, syn);
+    s->insn_start = NULL;
 }
 
 /* is_jmp field values */
diff --git a/target/cris/translate.c b/target/cris/translate.c
index 2831419..f51a731 100644
--- a/target/cris/translate.c
+++ b/target/cris/translate.c
@@ -2603,7 +2603,7 @@ static int dec_movem_mr(CPUCRISState *env, DisasContext *dc)
         tcg_gen_addi_tl(addr, cpu_R[dc->op1], i * 8);
         gen_load(dc, tmp32, addr, 4, 0);
     } else {
-        TCGV_UNUSED(tmp32);
+        tmp32 = NULL;
     }
     tcg_temp_free(addr);
 
@@ -3297,8 +3297,6 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
         qemu_log("--------------\n");
         qemu_log("IN: %s\n", lookup_symbol(pc_start));
         log_target_disas(cs, pc_start, dc->pc - pc_start);
-        qemu_log("\nisize=%d osize=%d\n",
-                 dc->pc - pc_start, tcg_op_buf_count());
         qemu_log_unlock();
     }
 #endif
diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index 53aa1f8..31d9a2a 100644
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -125,7 +125,7 @@ void hppa_translate_init(void)
 
     int i;
 
-    TCGV_UNUSED(cpu_gr[0]);
+    cpu_gr[0] = NULL;
     for (i = 1; i < 32; i++) {
         cpu_gr[i] = tcg_global_mem_new(cpu_env,
                                        offsetof(CPUHPPAState, gr[i]),
@@ -140,28 +140,31 @@ void hppa_translate_init(void)
 
 static DisasCond cond_make_f(void)
 {
-    DisasCond r = { .c = TCG_COND_NEVER };
-    TCGV_UNUSED(r.a0);
-    TCGV_UNUSED(r.a1);
-    return r;
+    return (DisasCond){
+        .c = TCG_COND_NEVER,
+        .a0 = NULL,
+        .a1 = NULL,
+    };
 }
 
 static DisasCond cond_make_n(void)
 {
-    DisasCond r = { .c = TCG_COND_NE, .a0_is_n = true, .a1_is_0 = true };
-    r.a0 = cpu_psw_n;
-    TCGV_UNUSED(r.a1);
-    return r;
+    return (DisasCond){
+        .c = TCG_COND_NE,
+        .a0 = cpu_psw_n,
+        .a0_is_n = true,
+        .a1 = NULL,
+        .a1_is_0 = true
+    };
 }
 
 static DisasCond cond_make_0(TCGCond c, TCGv a0)
 {
-    DisasCond r = { .c = c, .a1_is_0 = true };
+    DisasCond r = { .c = c, .a1 = NULL, .a1_is_0 = true };
 
     assert (c != TCG_COND_NEVER && c != TCG_COND_ALWAYS);
     r.a0 = tcg_temp_new();
     tcg_gen_mov_tl(r.a0, a0);
-    TCGV_UNUSED(r.a1);
 
     return r;
 }
@@ -199,8 +202,8 @@ static void cond_free(DisasCond *cond)
         }
         cond->a0_is_n = false;
         cond->a1_is_0 = false;
-        TCGV_UNUSED(cond->a0);
-        TCGV_UNUSED(cond->a1);
+        cond->a0 = NULL;
+        cond->a1 = NULL;
         /* fallthru */
     case TCG_COND_ALWAYS:
         cond->c = TCG_COND_NEVER;
@@ -716,9 +719,8 @@ static DisasCond do_sed_cond(unsigned orig, TCGv res)
 static DisasCond do_unit_cond(unsigned cf, TCGv res, TCGv in1, TCGv in2)
 {
     DisasCond cond;
-    TCGv tmp, cb;
+    TCGv tmp, cb = NULL;
 
-    TCGV_UNUSED(cb);
     if (cf & 8) {
         /* Since we want to test lots of carry-out bits all at once, do not
          * do our normal thing and compute carry-in of bit B+1 since that
@@ -826,8 +828,8 @@ static DisasJumpType do_add(DisasContext *ctx, unsigned rt, TCGv in1, TCGv in2,
     DisasCond cond;
 
     dest = tcg_temp_new();
-    TCGV_UNUSED(cb);
-    TCGV_UNUSED(cb_msb);
+    cb = NULL;
+    cb_msb = NULL;
 
     if (shift) {
         tmp = get_temp(ctx);
@@ -856,7 +858,7 @@ static DisasJumpType do_add(DisasContext *ctx, unsigned rt, TCGv in1, TCGv in2,
     }
 
     /* Compute signed overflow if required.  */
-    TCGV_UNUSED(sv);
+    sv = NULL;
     if (is_tsv || c == 6) {
         sv = do_add_sv(ctx, dest, in1, in2);
         if (is_tsv) {
@@ -919,7 +921,7 @@ static DisasJumpType do_sub(DisasContext *ctx, unsigned rt, TCGv in1, TCGv in2,
     tcg_temp_free(zero);
 
     /* Compute signed overflow if required.  */
-    TCGV_UNUSED(sv);
+    sv = NULL;
     if (is_tsv || c == 6) {
         sv = do_sub_sv(ctx, dest, in1, in2);
         if (is_tsv) {
@@ -965,7 +967,7 @@ static DisasJumpType do_cmpclr(DisasContext *ctx, unsigned rt, TCGv in1,
     tcg_gen_sub_tl(dest, in1, in2);
 
     /* Compute signed overflow if required.  */
-    TCGV_UNUSED(sv);
+    sv = NULL;
     if ((cf >> 1) == 6) {
         sv = do_sub_sv(ctx, dest, in1, in2);
     }
@@ -2070,8 +2072,7 @@ static DisasJumpType trans_ds(DisasContext *ctx, uint32_t insn,
 
     /* Install the new nullification.  */
     if (cf) {
-        TCGv sv;
-        TCGV_UNUSED(sv);
+        TCGv sv = NULL;
         if (cf >> 1 == 6) {
             /* ??? The lshift is supposed to contribute to overflow.  */
             sv = do_add_sv(ctx, dest, add1, add2);
@@ -2542,7 +2543,7 @@ static DisasJumpType trans_cmpb(DisasContext *ctx, uint32_t insn,
 
     tcg_gen_sub_tl(dest, in1, in2);
 
-    TCGV_UNUSED(sv);
+    sv = NULL;
     if (c == 6) {
         sv = do_sub_sv(ctx, dest, in1, in2);
     }
@@ -2571,8 +2572,8 @@ static DisasJumpType trans_addb(DisasContext *ctx, uint32_t insn,
     }
     in2 = load_gpr(ctx, r);
     dest = dest_gpr(ctx, r);
-    TCGV_UNUSED(sv);
-    TCGV_UNUSED(cb_msb);
+    sv = NULL;
+    cb_msb = NULL;
 
     switch (c) {
     default:
@@ -3732,18 +3733,16 @@ static int hppa_tr_init_disas_context(DisasContextBase *dcbase,
 {
     DisasContext *ctx = container_of(dcbase, DisasContext, base);
     TranslationBlock *tb = ctx->base.tb;
-    int i, bound;
+    int bound;
 
     ctx->cs = cs;
     ctx->iaoq_f = tb->pc;
     ctx->iaoq_b = tb->cs_base;
     ctx->iaoq_n = -1;
-    TCGV_UNUSED(ctx->iaoq_n_var);
+    ctx->iaoq_n_var = NULL;
 
     ctx->ntemps = 0;
-    for (i = 0; i < ARRAY_SIZE(ctx->temps); ++i) {
-        TCGV_UNUSED(ctx->temps[i]);
-    }
+    memset(ctx->temps, 0, sizeof(ctx->temps));
 
     bound = -(tb->pc | TARGET_PAGE_MASK) / 4;
     return MIN(max_insns, bound);
@@ -3804,7 +3803,7 @@ static void hppa_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
             tcg_gen_addi_tl(ctx->iaoq_n_var, cpu_iaoq_b, 4);
         } else {
             ctx->iaoq_n = ctx->iaoq_b + 4;
-            TCGV_UNUSED(ctx->iaoq_n_var);
+            ctx->iaoq_n_var = NULL;
         }
 
         if (unlikely(ctx->null_cond.c == TCG_COND_ALWAYS)) {
@@ -3819,7 +3818,7 @@ static void hppa_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
     /* Free any temporaries allocated.  */
     for (i = 0, n = ctx->ntemps; i < n; ++i) {
         tcg_temp_free(ctx->temps[i]);
-        TCGV_UNUSED(ctx->temps[i]);
+        ctx->temps[i] = NULL;
     }
     ctx->ntemps = 0;
 
diff --git a/target/i386/svm_helper.c b/target/i386/svm_helper.c
index f479239..3031069 100644
--- a/target/i386/svm_helper.c
+++ b/target/i386/svm_helper.c
@@ -584,9 +584,7 @@ void cpu_vmexit(CPUX86State *env, uint32_t exit_code, uint64_t exit_info_1,
 {
     CPUState *cs = CPU(x86_env_get_cpu(env));
 
-    if (retaddr) {
-        cpu_restore_state(cs, retaddr);
-    }
+    cpu_restore_state(cs, retaddr);
 
     qemu_log_mask(CPU_LOG_TB_IN_ASM, "vmexit(%08x, %016" PRIx64 ", %016"
                   PRIx64 ", " TARGET_FMT_lx ")!\n",
diff --git a/target/i386/translate.c b/target/i386/translate.c
index 23d7eec..0135415 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -689,7 +689,7 @@ static void gen_compute_eflags(DisasContext *s)
         return;
     }
 
-    TCGV_UNUSED(zero);
+    zero = NULL;
     dst = cpu_cc_dst;
     src1 = cpu_cc_src;
     src2 = cpu_cc_src2;
@@ -2050,9 +2050,8 @@ static AddressParts gen_lea_modrm_0(CPUX86State *env, DisasContext *s,
 /* Compute the address, with a minimum number of TCG ops.  */
 static TCGv gen_lea_modrm_1(AddressParts a)
 {
-    TCGv ea;
+    TCGv ea = NULL;
 
-    TCGV_UNUSED(ea);
     if (a.index >= 0) {
         if (a.scale == 0) {
             ea = cpu_regs[a.index];
@@ -2067,7 +2066,7 @@ static TCGv gen_lea_modrm_1(AddressParts a)
     } else if (a.base >= 0) {
         ea = cpu_regs[a.base];
     }
-    if (TCGV_IS_UNUSED(ea)) {
+    if (!ea) {
         tcg_gen_movi_tl(cpu_A0, a.disp);
         ea = cpu_A0;
     } else if (a.disp != 0) {
@@ -3951,7 +3950,7 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
                     gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 0);
 
                     /* Re-use the carry-out from a previous round.  */
-                    TCGV_UNUSED(carry_in);
+                    carry_in = NULL;
                     carry_out = (b == 0x1f6 ? cpu_cc_dst : cpu_cc_src2);
                     switch (s->cc_op) {
                     case CC_OP_ADCX:
@@ -3979,7 +3978,7 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
                         break;
                     }
                     /* If we can't reuse carry-out, get it out of EFLAGS.  */
-                    if (TCGV_IS_UNUSED(carry_in)) {
+                    if (!carry_in) {
                         if (s->cc_op != CC_OP_ADCX && s->cc_op != CC_OP_ADOX) {
                             gen_compute_eflags(s);
                         }
@@ -7673,7 +7672,7 @@ static target_ulong disas_insn(DisasContext *s, CPUState *cpu)
                 tcg_gen_mov_tl(a0, cpu_A0);
             } else {
                 gen_op_mov_v_reg(ot, t0, rm);
-                TCGV_UNUSED(a0);
+                a0 = NULL;
             }
             gen_op_mov_v_reg(ot, t1, reg);
             tcg_gen_andi_tl(cpu_tmp0, t0, 3);
diff --git a/target/lm32/op_helper.c b/target/lm32/op_helper.c
index 2177c8a..30f670e 100644
--- a/target/lm32/op_helper.c
+++ b/target/lm32/op_helper.c
@@ -151,11 +151,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = lm32_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret)) {
-        if (retaddr) {
-            /* now we have a real cpu fault */
-            cpu_restore_state(cs, retaddr);
-        }
-        cpu_loop_exit(cs);
+        /* now we have a real cpu fault */
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 #endif
diff --git a/target/lm32/translate.c b/target/lm32/translate.c
index b8b2b13..2e1c5e6 100644
--- a/target/lm32/translate.c
+++ b/target/lm32/translate.c
@@ -1156,8 +1156,6 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
         qemu_log_lock();
         qemu_log("\n");
         log_target_disas(cs, pc_start, dc->pc - pc_start);
-        qemu_log("\nisize=%d osize=%d\n",
-                 dc->pc - pc_start, tcg_op_buf_count());
         qemu_log_unlock();
     }
 #endif
diff --git a/target/m68k/op_helper.c b/target/m68k/op_helper.c
index 6308951..78bfb9f 100644
--- a/target/m68k/op_helper.c
+++ b/target/m68k/op_helper.c
@@ -46,11 +46,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = m68k_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret)) {
-        if (retaddr) {
-            /* now we have a real cpu fault */
-            cpu_restore_state(cs, retaddr);
-        }
-        cpu_loop_exit(cs);
+        /* now we have a real cpu fault */
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 
diff --git a/target/m68k/translate.c b/target/m68k/translate.c
index bbda739..09226eb 100644
--- a/target/m68k/translate.c
+++ b/target/m68k/translate.c
@@ -3948,8 +3948,8 @@ DISAS_INSN(bfop_reg)
     int ofs = extract32(ext, 6, 5);  /* big bit-endian */
     TCGv mask, tofs, tlen;
 
-    TCGV_UNUSED(tofs);
-    TCGV_UNUSED(tlen);
+    tofs = NULL;
+    tlen = NULL;
     if ((insn & 0x0f00) == 0x0d00) { /* bfffo */
         tofs = tcg_temp_new();
         tlen = tcg_temp_new();
@@ -3965,7 +3965,7 @@ DISAS_INSN(bfop_reg)
         }
         tcg_gen_andi_i32(QREG_CC_N, QREG_CC_N, ~maski);
         mask = tcg_const_i32(ror32(maski, ofs));
-        if (!TCGV_IS_UNUSED(tofs)) {
+        if (tofs) {
             tcg_gen_movi_i32(tofs, ofs);
             tcg_gen_movi_i32(tlen, len);
         }
@@ -3977,13 +3977,13 @@ DISAS_INSN(bfop_reg)
             tcg_gen_andi_i32(tmp, tmp, 31);
             mask = tcg_const_i32(0x7fffffffu);
             tcg_gen_shr_i32(mask, mask, tmp);
-            if (!TCGV_IS_UNUSED(tlen)) {
+            if (tlen) {
                 tcg_gen_addi_i32(tlen, tmp, 1);
             }
         } else {
             /* Immediate width */
             mask = tcg_const_i32(0x7fffffffu >> (len - 1));
-            if (!TCGV_IS_UNUSED(tlen)) {
+            if (tlen) {
                 tcg_gen_movi_i32(tlen, len);
             }
         }
@@ -3993,7 +3993,7 @@ DISAS_INSN(bfop_reg)
             tcg_gen_rotl_i32(QREG_CC_N, src, tmp);
             tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
             tcg_gen_rotr_i32(mask, mask, tmp);
-            if (!TCGV_IS_UNUSED(tofs)) {
+            if (tofs) {
                 tcg_gen_mov_i32(tofs, tmp);
             }
         } else {
@@ -4001,7 +4001,7 @@ DISAS_INSN(bfop_reg)
             tcg_gen_rotli_i32(QREG_CC_N, src, ofs);
             tcg_gen_andc_i32(QREG_CC_N, QREG_CC_N, mask);
             tcg_gen_rotri_i32(mask, mask, ofs);
-            if (!TCGV_IS_UNUSED(tofs)) {
+            if (tofs) {
                 tcg_gen_movi_i32(tofs, ofs);
             }
         }
diff --git a/target/microblaze/op_helper.c b/target/microblaze/op_helper.c
index 1e07e21..4cf5156 100644
--- a/target/microblaze/op_helper.c
+++ b/target/microblaze/op_helper.c
@@ -40,11 +40,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = mb_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret)) {
-        if (retaddr) {
-            /* now we have a real cpu fault */
-            cpu_restore_state(cs, retaddr);
-        }
-        cpu_loop_exit(cs);
+        /* now we have a real cpu fault */
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 #endif
diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c
index e7b5597..7628b0e 100644
--- a/target/microblaze/translate.c
+++ b/target/microblaze/translate.c
@@ -1808,11 +1808,7 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
         && qemu_log_in_addr_range(pc_start)) {
         qemu_log_lock();
         qemu_log("--------------\n");
-#if DISAS_GNU
         log_target_disas(cs, pc_start, dc->pc - pc_start);
-#endif
-        qemu_log("\nisize=%d osize=%d\n",
-                 dc->pc - pc_start, tcg_op_buf_count());
         qemu_log_unlock();
     }
 #endif
diff --git a/target/mips/translate.c b/target/mips/translate.c
index b022f84..d05ee67 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -20453,7 +20453,7 @@ void mips_tcg_init(void)
 {
     int i;
 
-    TCGV_UNUSED(cpu_gpr[0]);
+    cpu_gpr[0] = NULL;
     for (i = 1; i < 32; i++)
         cpu_gpr[i] = tcg_global_mem_new(cpu_env,
                                         offsetof(CPUMIPSState, active_tc.gpr[i]),
diff --git a/target/moxie/helper.c b/target/moxie/helper.c
index 330299f..6890ffd 100644
--- a/target/moxie/helper.c
+++ b/target/moxie/helper.c
@@ -36,11 +36,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = moxie_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret)) {
-        if (retaddr) {
-            cpu_restore_state(cs, retaddr);
-        }
+        cpu_loop_exit_restore(cs, retaddr);
     }
-    cpu_loop_exit(cs);
 }
 
 void helper_raise_exception(CPUMoxieState *env, int ex)
diff --git a/target/nios2/mmu.c b/target/nios2/mmu.c
index fe9298a..0cd8647 100644
--- a/target/nios2/mmu.c
+++ b/target/nios2/mmu.c
@@ -42,11 +42,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = nios2_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret)) {
-        if (retaddr) {
-            /* now we have a real cpu fault */
-            cpu_restore_state(cs, retaddr);
-        }
-        cpu_loop_exit(cs);
+        /* now we have a real cpu fault */
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 
diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index 51a54ff..cb8624e 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -125,7 +125,7 @@ static uint8_t get_opxcode(uint32_t code)
 
 static TCGv load_zero(DisasContext *dc)
 {
-    if (TCGV_IS_UNUSED_I32(dc->zero)) {
+    if (!dc->zero) {
         dc->zero = tcg_const_i32(0);
     }
     return dc->zero;
@@ -755,12 +755,12 @@ static void handle_instruction(DisasContext *dc, CPUNios2State *env)
         goto illegal_op;
     }
 
-    TCGV_UNUSED_I32(dc->zero);
+    dc->zero = NULL;
 
     instr = &i_type_instructions[op];
     instr->handler(dc, code, instr->flags);
 
-    if (!TCGV_IS_UNUSED_I32(dc->zero)) {
+    if (dc->zero) {
         tcg_temp_free(dc->zero);
     }
 
diff --git a/target/openrisc/mmu_helper.c b/target/openrisc/mmu_helper.c
index a44d0aa..a3e182c 100644
--- a/target/openrisc/mmu_helper.c
+++ b/target/openrisc/mmu_helper.c
@@ -33,12 +33,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
     ret = openrisc_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
 
     if (ret) {
-        if (retaddr) {
-            /* now we have a real cpu fault.  */
-            cpu_restore_state(cs, retaddr);
-        }
         /* Raise Exception.  */
-        cpu_loop_exit(cs);
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 #endif
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 4075fc8..0ef21cc 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -3495,7 +3495,7 @@ static void gen_bcond(DisasContext *ctx, int type)
         else
             tcg_gen_mov_tl(target, cpu_lr);
     } else {
-        TCGV_UNUSED(target);
+        target = NULL;
     }
     if (LK(ctx->opcode))
         gen_setlr(ctx, ctx->nip);
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index eede2ed..ac55886 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -434,11 +434,9 @@ static void set_cc_static(DisasContext *s)
 /* calculates cc into cc_op */
 static void gen_op_calc_cc(DisasContext *s)
 {
-    TCGv_i32 local_cc_op;
-    TCGv_i64 dummy;
+    TCGv_i32 local_cc_op = NULL;
+    TCGv_i64 dummy = NULL;
 
-    TCGV_UNUSED_I32(local_cc_op);
-    TCGV_UNUSED_I64(dummy);
     switch (s->cc_op) {
     default:
         dummy = tcg_const_i64(0);
@@ -528,10 +526,10 @@ static void gen_op_calc_cc(DisasContext *s)
         tcg_abort();
     }
 
-    if (!TCGV_IS_UNUSED_I32(local_cc_op)) {
+    if (local_cc_op) {
         tcg_temp_free_i32(local_cc_op);
     }
-    if (!TCGV_IS_UNUSED_I64(dummy)) {
+    if (dummy) {
         tcg_temp_free_i64(dummy);
     }
 
@@ -1189,7 +1187,7 @@ static ExitStatus help_branch(DisasContext *s, DisasCompare *c,
             goto egress;
         }
     } else {
-        if (TCGV_IS_UNUSED_I64(cdest)) {
+        if (!cdest) {
             /* E.g. bcr %r0 -> no branch.  */
             ret = NO_EXIT;
             goto egress;
@@ -1451,7 +1449,7 @@ static ExitStatus op_ni(DisasContext *s, DisasOps *o)
 static ExitStatus op_bas(DisasContext *s, DisasOps *o)
 {
     tcg_gen_movi_i64(o->out, pc_to_link_info(s, s->next_pc));
-    if (!TCGV_IS_UNUSED_I64(o->in2)) {
+    if (o->in2) {
         tcg_gen_mov_i64(psw_addr, o->in2);
         per_branch(s, false);
         return EXIT_PC_UPDATED;
@@ -3031,7 +3029,7 @@ static ExitStatus op_mov2(DisasContext *s, DisasOps *o)
 {
     o->out = o->in2;
     o->g_out = o->g_in2;
-    TCGV_UNUSED_I64(o->in2);
+    o->in2 = NULL;
     o->g_in2 = false;
     return NO_EXIT;
 }
@@ -3043,7 +3041,7 @@ static ExitStatus op_mov2e(DisasContext *s, DisasOps *o)
 
     o->out = o->in2;
     o->g_out = o->g_in2;
-    TCGV_UNUSED_I64(o->in2);
+    o->in2 = NULL;
     o->g_in2 = false;
 
     switch (s->tb->flags & FLAG_MASK_ASC) {
@@ -3077,8 +3075,8 @@ static ExitStatus op_movx(DisasContext *s, DisasOps *o)
     o->out2 = o->in2;
     o->g_out = o->g_in1;
     o->g_out2 = o->g_in2;
-    TCGV_UNUSED_I64(o->in1);
-    TCGV_UNUSED_I64(o->in2);
+    o->in1 = NULL;
+    o->in2 = NULL;
     o->g_in1 = o->g_in2 = false;
     return NO_EXIT;
 }
@@ -5945,11 +5943,11 @@ static ExitStatus translate_one(CPUS390XState *env, DisasContext *s)
     s->insn = insn;
     s->fields = &f;
     o.g_out = o.g_out2 = o.g_in1 = o.g_in2 = false;
-    TCGV_UNUSED_I64(o.out);
-    TCGV_UNUSED_I64(o.out2);
-    TCGV_UNUSED_I64(o.in1);
-    TCGV_UNUSED_I64(o.in2);
-    TCGV_UNUSED_I64(o.addr1);
+    o.out = NULL;
+    o.out2 = NULL;
+    o.in1 = NULL;
+    o.in2 = NULL;
+    o.addr1 = NULL;
 
     /* Implement the instruction.  */
     if (insn->help_in1) {
@@ -5972,19 +5970,19 @@ static ExitStatus translate_one(CPUS390XState *env, DisasContext *s)
     }
 
     /* Free any temporaries created by the helpers.  */
-    if (!TCGV_IS_UNUSED_I64(o.out) && !o.g_out) {
+    if (o.out && !o.g_out) {
         tcg_temp_free_i64(o.out);
     }
-    if (!TCGV_IS_UNUSED_I64(o.out2) && !o.g_out2) {
+    if (o.out2 && !o.g_out2) {
         tcg_temp_free_i64(o.out2);
     }
-    if (!TCGV_IS_UNUSED_I64(o.in1) && !o.g_in1) {
+    if (o.in1 && !o.g_in1) {
         tcg_temp_free_i64(o.in1);
     }
-    if (!TCGV_IS_UNUSED_I64(o.in2) && !o.g_in2) {
+    if (o.in2 && !o.g_in2) {
         tcg_temp_free_i64(o.in2);
     }
-    if (!TCGV_IS_UNUSED_I64(o.addr1)) {
+    if (o.addr1) {
         tcg_temp_free_i64(o.addr1);
     }
 
diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index 038663c..012156b 100644
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -1940,7 +1940,7 @@ static int decode_gusa(DisasContext *ctx, CPUSH4State *env, int *pmax_insns)
     op_dst = op_src = op_opc = -1;
     mt_dst = -1;
     st_src = st_mop = -1;
-    TCGV_UNUSED(op_arg);
+    op_arg = NULL;
     i = 0;
 
 #define NEXT_INSN \
@@ -2228,7 +2228,7 @@ static int decode_gusa(DisasContext *ctx, CPUSH4State *env, int *pmax_insns)
     }
 
     /* If op_src is not a valid register, then op_arg was a constant.  */
-    if (op_src < 0 && !TCGV_IS_UNUSED(op_arg)) {
+    if (op_src < 0 && op_arg) {
         tcg_temp_free_i32(op_arg);
     }
 
diff --git a/target/sparc/translate.c b/target/sparc/translate.c
index 849a02a..71e0853 100644
--- a/target/sparc/translate.c
+++ b/target/sparc/translate.c
@@ -5922,7 +5922,7 @@ void sparc_tcg_init(void)
         *rtl[i].ptr = tcg_global_mem_new(cpu_env, rtl[i].off, rtl[i].name);
     }
 
-    TCGV_UNUSED(cpu_regs[0]);
+    cpu_regs[0] = NULL;
     for (i = 1; i < 8; ++i) {
         cpu_regs[i] = tcg_global_mem_new(cpu_env,
                                          offsetof(CPUSPARCState, gregs[i]),
diff --git a/target/tilegx/translate.c b/target/tilegx/translate.c
index d55549d..d63bf5b 100644
--- a/target/tilegx/translate.c
+++ b/target/tilegx/translate.c
@@ -143,7 +143,7 @@ static bool check_gr(DisasContext *dc, uint8_t reg)
 
 static TCGv load_zero(DisasContext *dc)
 {
-    if (TCGV_IS_UNUSED_I64(dc->zero)) {
+    if (!dc->zero) {
         dc->zero = tcg_const_i64(0);
     }
     return dc->zero;
@@ -2324,7 +2324,7 @@ static void translate_one_bundle(DisasContext *dc, uint64_t bundle)
     for (i = 0; i < ARRAY_SIZE(dc->wb); i++) {
         DisasContextTemp *wb = &dc->wb[i];
         wb->reg = TILEGX_R_NOREG;
-        TCGV_UNUSED_I64(wb->val);
+        wb->val = NULL;
     }
     dc->num_wb = 0;
 
@@ -2384,9 +2384,9 @@ void gen_intermediate_code(CPUState *cs, struct TranslationBlock *tb)
     dc->exit_tb = false;
     dc->atomic_excp = TILEGX_EXCP_NONE;
     dc->jmp.cond = TCG_COND_NEVER;
-    TCGV_UNUSED_I64(dc->jmp.dest);
-    TCGV_UNUSED_I64(dc->jmp.val1);
-    TCGV_UNUSED_I64(dc->zero);
+    dc->jmp.dest = NULL;
+    dc->jmp.val1 = NULL;
+    dc->zero = NULL;
 
     if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
         qemu_log_lock();
diff --git a/target/tricore/op_helper.c b/target/tricore/op_helper.c
index 7af202c..40ed229 100644
--- a/target/tricore/op_helper.c
+++ b/target/tricore/op_helper.c
@@ -31,9 +31,7 @@ raise_exception_sync_internal(CPUTriCoreState *env, uint32_t class, int tin,
 {
     CPUState *cs = CPU(tricore_env_get_cpu(env));
     /* in case we come from a helper-call we need to restore the PC */
-    if (pc) {
-        cpu_restore_state(cs, pc);
-    }
+    cpu_restore_state(cs, pc);
 
     /* Tin is loaded into d[15] */
     env->gpr_d[15] = tin;
@@ -2804,13 +2802,8 @@ static inline void QEMU_NORETURN do_raise_exception_err(CPUTriCoreState *env,
     CPUState *cs = CPU(tricore_env_get_cpu(env));
     cs->exception_index = exception;
     env->error_code = error_code;
-
-    if (pc) {
-        /* now we have a real cpu fault */
-        cpu_restore_state(cs, pc);
-    }
-
-    cpu_loop_exit(cs);
+    /* now we have a real cpu fault */
+    cpu_loop_exit_restore(cs, pc);
 }
 
 void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
diff --git a/target/unicore32/op_helper.c b/target/unicore32/op_helper.c
index 0872c29..8788642 100644
--- a/target/unicore32/op_helper.c
+++ b/target/unicore32/op_helper.c
@@ -251,11 +251,8 @@ void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
 
     ret = uc32_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
     if (unlikely(ret)) {
-        if (retaddr) {
-            /* now we have a real cpu fault */
-            cpu_restore_state(cs, retaddr);
-        }
-        cpu_loop_exit(cs);
+        /* now we have a real cpu fault */
+        cpu_loop_exit_restore(cs, retaddr);
     }
 }
 #endif
diff --git a/target/unicore32/translate.c b/target/unicore32/translate.c
index 384aa86..5b51f21 100644
--- a/target/unicore32/translate.c
+++ b/target/unicore32/translate.c
@@ -1230,7 +1230,7 @@ static void do_datap(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
     if (UCOP_OPCODES != 0x0f && UCOP_OPCODES != 0x0d) {
         tmp = load_reg(s, UCOP_REG_N);
     } else {
-        TCGV_UNUSED(tmp);
+        tmp = NULL;
     }
 
     switch (UCOP_OPCODES) {
@@ -1652,7 +1652,7 @@ static void do_ldst_m(CPUUniCore32State *env, DisasContext *s, uint32_t insn)
 
     /* compute total size */
     loaded_base = 0;
-    TCGV_UNUSED(loaded_var);
+    loaded_var = NULL;
     n = 0;
     for (i = 0; i < 6; i++) {
         if (UCOP_SET(i)) {
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 438321c..2cbbeef 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -602,8 +602,8 @@ static bool swap_commutative2(TCGArg *p1, TCGArg *p2)
 /* Propagate constants and copies, fold constant expressions. */
 void tcg_optimize(TCGContext *s)
 {
-    int oi, oi_next, nb_temps, nb_globals;
-    TCGOp *prev_mb = NULL;
+    int nb_temps, nb_globals;
+    TCGOp *op, *op_next, *prev_mb = NULL;
     struct tcg_temp_info *infos;
     TCGTempSet temps_used;
 
@@ -617,22 +617,18 @@ void tcg_optimize(TCGContext *s)
     bitmap_zero(temps_used.l, nb_temps);
     infos = tcg_malloc(sizeof(struct tcg_temp_info) * nb_temps);
 
-    for (oi = s->gen_op_buf[0].next; oi != 0; oi = oi_next) {
+    QTAILQ_FOREACH_SAFE(op, &s->ops, link, op_next) {
         tcg_target_ulong mask, partmask, affected;
         int nb_oargs, nb_iargs, i;
         TCGArg tmp;
-
-        TCGOp * const op = &s->gen_op_buf[oi];
         TCGOpcode opc = op->opc;
         const TCGOpDef *def = &tcg_op_defs[opc];
 
-        oi_next = op->next;
-
         /* Count the arguments, and initialize the temps that are
            going to be used */
         if (opc == INDEX_op_call) {
-            nb_oargs = op->callo;
-            nb_iargs = op->calli;
+            nb_oargs = TCGOP_CALLO(op);
+            nb_iargs = TCGOP_CALLI(op);
             for (i = 0; i < nb_oargs + nb_iargs; i++) {
                 TCGTemp *ts = arg_temp(op->args[i]);
                 if (ts) {
@@ -1261,9 +1257,6 @@ void tcg_optimize(TCGContext *s)
                 rh = op->args[1];
                 tcg_opt_gen_movi(s, op, rl, (int32_t)a);
                 tcg_opt_gen_movi(s, op2, rh, (int32_t)(a >> 32));
-
-                /* We've done all we need to do with the movi.  Skip it.  */
-                oi_next = op2->next;
                 break;
             }
             goto do_default;
@@ -1280,9 +1273,6 @@ void tcg_optimize(TCGContext *s)
                 rh = op->args[1];
                 tcg_opt_gen_movi(s, op, rl, (int32_t)r);
                 tcg_opt_gen_movi(s, op2, rh, (int32_t)(r >> 32));
-
-                /* We've done all we need to do with the movi.  Skip it.  */
-                oi_next = op2->next;
                 break;
             }
             goto do_default;
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 3cad30b..0c509bf 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -42,30 +42,6 @@ extern TCGv_i32 TCGV_HIGH_link_error(TCGv_i64);
 #define TCGV_HIGH TCGV_HIGH_link_error
 #endif
 
-/* Note that this is optimized for sequential allocation during translate.
-   Up to and including filling in the forward link immediately.  We'll do
-   proper termination of the end of the list after we finish translation.  */
-
-static inline TCGOp *tcg_emit_op(TCGOpcode opc)
-{
-    TCGContext *ctx = tcg_ctx;
-    int oi = ctx->gen_next_op_idx;
-    int ni = oi + 1;
-    int pi = oi - 1;
-    TCGOp *op = &ctx->gen_op_buf[oi];
-
-    tcg_debug_assert(oi < OPC_BUF_SIZE);
-    ctx->gen_op_buf[0].prev = oi;
-    ctx->gen_next_op_idx = ni;
-
-    memset(op, 0, offsetof(TCGOp, args));
-    op->opc = opc;
-    op->prev = pi;
-    op->next = ni;
-
-    return op;
-}
-
 void tcg_gen_op1(TCGOpcode opc, TCGArg a1)
 {
     TCGOp *op = tcg_emit_op(opc);
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index 3129159..ca07b32 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -807,8 +807,6 @@ void tcg_gen_lookup_and_goto_ptr(void);
 #define tcg_global_mem_new tcg_global_mem_new_i32
 #define tcg_temp_local_new() tcg_temp_local_new_i32()
 #define tcg_temp_free tcg_temp_free_i32
-#define TCGV_UNUSED(x) TCGV_UNUSED_I32(x)
-#define TCGV_IS_UNUSED(x) TCGV_IS_UNUSED_I32(x)
 #define tcg_gen_qemu_ld_tl tcg_gen_qemu_ld_i32
 #define tcg_gen_qemu_st_tl tcg_gen_qemu_st_i32
 #else
@@ -817,8 +815,6 @@ void tcg_gen_lookup_and_goto_ptr(void);
 #define tcg_global_mem_new tcg_global_mem_new_i64
 #define tcg_temp_local_new() tcg_temp_local_new_i64()
 #define tcg_temp_free tcg_temp_free_i64
-#define TCGV_UNUSED(x) TCGV_UNUSED_I64(x)
-#define TCGV_IS_UNUSED(x) TCGV_IS_UNUSED_I64(x)
 #define tcg_gen_qemu_ld_tl tcg_gen_qemu_ld_i64
 #define tcg_gen_qemu_st_tl tcg_gen_qemu_st_i64
 #endif
diff --git a/tcg/tcg.c b/tcg/tcg.c
index c22f1c4..93caa0b 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -862,9 +862,8 @@ void tcg_func_start(TCGContext *s)
     s->goto_tb_issue_mask = 0;
 #endif
 
-    s->gen_op_buf[0].next = 1;
-    s->gen_op_buf[0].prev = 0;
-    s->gen_next_op_idx = 1;
+    QTAILQ_INIT(&s->ops);
+    QTAILQ_INIT(&s->free_ops);
 }
 
 static inline TCGTemp *tcg_temp_alloc(TCGContext *s)
@@ -1339,7 +1338,6 @@ bool tcg_op_supported(TCGOpcode op)
    and endian swap in tcg_reg_alloc_call(). */
 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
 {
-    TCGContext *s = tcg_ctx;
     int i, real_args, nb_rets, pi;
     unsigned sizemask, flags;
     TCGHelperInfo *info;
@@ -1358,8 +1356,8 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     TCGv_i64 retl, reth;
     TCGTemp *split_args[MAX_OPC_PARAM];
 
-    TCGV_UNUSED_I64(retl);
-    TCGV_UNUSED_I64(reth);
+    retl = NULL;
+    reth = NULL;
     if (sizemask != 0) {
         for (i = real_args = 0; i < nargs; ++i) {
             int is_64bit = sizemask & (1 << (i+1)*2);
@@ -1395,17 +1393,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     }
 #endif /* TCG_TARGET_EXTEND_ARGS */
 
-    i = s->gen_next_op_idx;
-    tcg_debug_assert(i < OPC_BUF_SIZE);
-    s->gen_op_buf[0].prev = i;
-    s->gen_next_op_idx = i + 1;
-    op = &s->gen_op_buf[i];
-
-    /* Set links for sequential allocation during translation.  */
-    memset(op, 0, offsetof(TCGOp, args));
-    op->opc = INDEX_op_call;
-    op->prev = i - 1;
-    op->next = i + 1;
+    op = tcg_emit_op(INDEX_op_call);
 
     pi = 0;
     if (ret != NULL) {
@@ -1442,7 +1430,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     } else {
         nb_rets = 0;
     }
-    op->callo = nb_rets;
+    TCGOP_CALLO(op) = nb_rets;
 
     real_args = 0;
     for (i = 0; i < nargs; i++) {
@@ -1481,10 +1469,10 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
     }
     op->args[pi++] = (uintptr_t)func;
     op->args[pi++] = flags;
-    op->calli = real_args;
+    TCGOP_CALLI(op) = real_args;
 
     /* Make sure the fields didn't overflow.  */
-    tcg_debug_assert(op->calli == real_args);
+    tcg_debug_assert(TCGOP_CALLI(op) == real_args);
     tcg_debug_assert(pi <= ARRAY_SIZE(op->args));
 
 #if defined(__sparc__) && !defined(__arch64__) \
@@ -1622,20 +1610,18 @@ void tcg_dump_ops(TCGContext *s)
 {
     char buf[128];
     TCGOp *op;
-    int oi;
 
-    for (oi = s->gen_op_buf[0].next; oi != 0; oi = op->next) {
+    QTAILQ_FOREACH(op, &s->ops, link) {
         int i, k, nb_oargs, nb_iargs, nb_cargs;
         const TCGOpDef *def;
         TCGOpcode c;
         int col = 0;
 
-        op = &s->gen_op_buf[oi];
         c = op->opc;
         def = &tcg_op_defs[c];
 
         if (c == INDEX_op_insn_start) {
-            col += qemu_log("%s ----", oi != s->gen_op_buf[0].next ? "\n" : "");
+            col += qemu_log("\n ----");
 
             for (i = 0; i < TARGET_INSN_START_WORDS; ++i) {
                 target_ulong a;
@@ -1648,8 +1634,8 @@ void tcg_dump_ops(TCGContext *s)
             }
         } else if (c == INDEX_op_call) {
             /* variable number of arguments */
-            nb_oargs = op->callo;
-            nb_iargs = op->calli;
+            nb_oargs = TCGOP_CALLO(op);
+            nb_iargs = TCGOP_CALLI(op);
             nb_cargs = def->nb_cargs;
 
             /* function name, flags, out args */
@@ -1898,65 +1884,51 @@ static void process_op_defs(TCGContext *s)
 
 void tcg_op_remove(TCGContext *s, TCGOp *op)
 {
-    int next = op->next;
-    int prev = op->prev;
-
-    /* We should never attempt to remove the list terminator.  */
-    tcg_debug_assert(op != &s->gen_op_buf[0]);
-
-    s->gen_op_buf[next].prev = prev;
-    s->gen_op_buf[prev].next = next;
-
-    memset(op, 0, sizeof(*op));
+    QTAILQ_REMOVE(&s->ops, op, link);
+    QTAILQ_INSERT_TAIL(&s->free_ops, op, link);
 
 #ifdef CONFIG_PROFILER
     atomic_set(&s->prof.del_op_count, s->prof.del_op_count + 1);
 #endif
 }
 
-TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op,
-                            TCGOpcode opc, int nargs)
+static TCGOp *tcg_op_alloc(TCGOpcode opc)
 {
-    int oi = s->gen_next_op_idx;
-    int prev = old_op->prev;
-    int next = old_op - s->gen_op_buf;
-    TCGOp *new_op;
+    TCGContext *s = tcg_ctx;
+    TCGOp *op;
 
-    tcg_debug_assert(oi < OPC_BUF_SIZE);
-    s->gen_next_op_idx = oi + 1;
+    if (likely(QTAILQ_EMPTY(&s->free_ops))) {
+        op = tcg_malloc(sizeof(TCGOp));
+    } else {
+        op = QTAILQ_FIRST(&s->free_ops);
+        QTAILQ_REMOVE(&s->free_ops, op, link);
+    }
+    memset(op, 0, offsetof(TCGOp, link));
+    op->opc = opc;
 
-    new_op = &s->gen_op_buf[oi];
-    *new_op = (TCGOp){
-        .opc = opc,
-        .prev = prev,
-        .next = next
-    };
-    s->gen_op_buf[prev].next = oi;
-    old_op->prev = oi;
+    return op;
+}
+
+TCGOp *tcg_emit_op(TCGOpcode opc)
+{
+    TCGOp *op = tcg_op_alloc(opc);
+    QTAILQ_INSERT_TAIL(&tcg_ctx->ops, op, link);
+    return op;
+}
 
+TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *old_op,
+                            TCGOpcode opc, int nargs)
+{
+    TCGOp *new_op = tcg_op_alloc(opc);
+    QTAILQ_INSERT_BEFORE(old_op, new_op, link);
     return new_op;
 }
 
 TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *old_op,
                            TCGOpcode opc, int nargs)
 {
-    int oi = s->gen_next_op_idx;
-    int prev = old_op - s->gen_op_buf;
-    int next = old_op->next;
-    TCGOp *new_op;
-
-    tcg_debug_assert(oi < OPC_BUF_SIZE);
-    s->gen_next_op_idx = oi + 1;
-
-    new_op = &s->gen_op_buf[oi];
-    *new_op = (TCGOp){
-        .opc = opc,
-        .prev = prev,
-        .next = next
-    };
-    s->gen_op_buf[next].prev = oi;
-    old_op->next = oi;
-
+    TCGOp *new_op = tcg_op_alloc(opc);
+    QTAILQ_INSERT_AFTER(&s->ops, old_op, new_op, link);
     return new_op;
 }
 
@@ -2006,30 +1978,26 @@ static void tcg_la_bb_end(TCGContext *s)
 static void liveness_pass_1(TCGContext *s)
 {
     int nb_globals = s->nb_globals;
-    int oi, oi_prev;
+    TCGOp *op, *op_prev;
 
     tcg_la_func_end(s);
 
-    for (oi = s->gen_op_buf[0].prev; oi != 0; oi = oi_prev) {
+    QTAILQ_FOREACH_REVERSE_SAFE(op, &s->ops, TCGOpHead, link, op_prev) {
         int i, nb_iargs, nb_oargs;
         TCGOpcode opc_new, opc_new2;
         bool have_opc_new2;
         TCGLifeData arg_life = 0;
         TCGTemp *arg_ts;
-
-        TCGOp * const op = &s->gen_op_buf[oi];
         TCGOpcode opc = op->opc;
         const TCGOpDef *def = &tcg_op_defs[opc];
 
-        oi_prev = op->prev;
-
         switch (opc) {
         case INDEX_op_call:
             {
                 int call_flags;
 
-                nb_oargs = op->callo;
-                nb_iargs = op->calli;
+                nb_oargs = TCGOP_CALLO(op);
+                nb_iargs = TCGOP_CALLI(op);
                 call_flags = op->args[nb_oargs + nb_iargs + 1];
 
                 /* pure functions can be removed if their result is unused */
@@ -2233,8 +2201,9 @@ static void liveness_pass_1(TCGContext *s)
 static bool liveness_pass_2(TCGContext *s)
 {
     int nb_globals = s->nb_globals;
-    int nb_temps, i, oi, oi_next;
+    int nb_temps, i;
     bool changes = false;
+    TCGOp *op, *op_next;
 
     /* Create a temporary for each indirect global.  */
     for (i = 0; i < nb_globals; ++i) {
@@ -2256,19 +2225,16 @@ static bool liveness_pass_2(TCGContext *s)
         its->state = TS_DEAD;
     }
 
-    for (oi = s->gen_op_buf[0].next; oi != 0; oi = oi_next) {
-        TCGOp *op = &s->gen_op_buf[oi];
+    QTAILQ_FOREACH_SAFE(op, &s->ops, link, op_next) {
         TCGOpcode opc = op->opc;
         const TCGOpDef *def = &tcg_op_defs[opc];
         TCGLifeData arg_life = op->life;
         int nb_iargs, nb_oargs, call_flags;
         TCGTemp *arg_ts, *dir_ts;
 
-        oi_next = op->next;
-
         if (opc == INDEX_op_call) {
-            nb_oargs = op->callo;
-            nb_iargs = op->calli;
+            nb_oargs = TCGOP_CALLO(op);
+            nb_iargs = TCGOP_CALLI(op);
             call_flags = op->args[nb_oargs + nb_iargs + 1];
         } else {
             nb_iargs = def->nb_iargs;
@@ -2949,8 +2915,8 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
 
 static void tcg_reg_alloc_call(TCGContext *s, TCGOp *op)
 {
-    const int nb_oargs = op->callo;
-    const int nb_iargs = op->calli;
+    const int nb_oargs = TCGOP_CALLO(op);
+    const int nb_iargs = TCGOP_CALLI(op);
     const TCGLifeData arg_life = op->life;
     int flags, nb_regs, i;
     TCGReg reg;
@@ -3168,13 +3134,16 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
 #ifdef CONFIG_PROFILER
     TCGProfile *prof = &s->prof;
 #endif
-    int i, oi, oi_next, num_insns;
+    int i, num_insns;
+    TCGOp *op;
 
 #ifdef CONFIG_PROFILER
     {
         int n;
 
-        n = s->gen_op_buf[0].prev + 1;
+        QTAILQ_FOREACH(op, &s->ops, link) {
+            n++;
+        }
         atomic_set(&prof->op_count, prof->op_count + n);
         if (n > prof->op_count_max) {
             atomic_set(&prof->op_count_max, n);
@@ -3260,11 +3229,9 @@ int tcg_gen_code(TCGContext *s, TranslationBlock *tb)
 #endif
 
     num_insns = -1;
-    for (oi = s->gen_op_buf[0].next; oi != 0; oi = oi_next) {
-        TCGOp * const op = &s->gen_op_buf[oi];
+    QTAILQ_FOREACH(op, &s->ops, link) {
         TCGOpcode opc = op->opc;
 
-        oi_next = op->next;
 #ifdef CONFIG_PROFILER
         atomic_set(&prof->table_op_count[opc], prof->table_op_count[opc] + 1);
 #endif
diff --git a/tcg/tcg.h b/tcg/tcg.h
index cb7b329..2ce497c 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -29,6 +29,7 @@
 #include "cpu.h"
 #include "exec/tb-context.h"
 #include "qemu/bitops.h"
+#include "qemu/queue.h"
 #include "tcg-mo.h"
 #include "tcg-target.h"
 
@@ -40,7 +41,7 @@
 #else
 #define MAX_OPC_PARAM_PER_ARG 1
 #endif
-#define MAX_OPC_PARAM_IARGS 5
+#define MAX_OPC_PARAM_IARGS 6
 #define MAX_OPC_PARAM_OARGS 1
 #define MAX_OPC_PARAM_ARGS (MAX_OPC_PARAM_IARGS + MAX_OPC_PARAM_OARGS)
 
@@ -48,8 +49,6 @@
  * and up to 4 + N parameters on 64-bit archs
  * (N = number of input arguments + output arguments).  */
 #define MAX_OPC_PARAM (4 + (MAX_OPC_PARAM_PER_ARG * MAX_OPC_PARAM_ARGS))
-#define OPC_BUF_SIZE 640
-#define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
 
 #define CPU_TEMP_BUF_NLONGS 128
 
@@ -428,15 +427,6 @@ typedef TCGv_ptr TCGv_env;
 #error Unhandled TARGET_LONG_BITS value
 #endif
 
-/* See the comment before tcgv_i32_temp.  */
-#define TCGV_UNUSED_I32(x) (x = (TCGv_i32)NULL)
-#define TCGV_UNUSED_I64(x) (x = (TCGv_i64)NULL)
-#define TCGV_UNUSED_PTR(x) (x = (TCGv_ptr)NULL)
-
-#define TCGV_IS_UNUSED_I32(x) ((x) == (TCGv_i32)NULL)
-#define TCGV_IS_UNUSED_I64(x) ((x) == (TCGv_i64)NULL)
-#define TCGV_IS_UNUSED_PTR(x) ((x) == (TCGv_ptr)NULL)
-
 /* call flags */
 /* Helper does not read globals (either directly or through an exception). It
    implies TCG_CALL_NO_WRITE_GLOBALS. */
@@ -498,6 +488,12 @@ static inline TCGCond tcg_unsigned_cond(TCGCond c)
     return c & 2 ? (TCGCond)(c ^ 6) : c;
 }
 
+/* Create a "signed" version of an "unsigned" comparison.  */
+static inline TCGCond tcg_signed_cond(TCGCond c)
+{
+    return c & 4 ? (TCGCond)(c ^ 6) : c;
+}
+
 /* Must a comparison be considered unsigned?  */
 static inline bool is_unsigned_cond(TCGCond c)
 {
@@ -576,28 +572,25 @@ typedef uint16_t TCGLifeData;
 typedef struct TCGOp {
     TCGOpcode opc   : 8;        /*  8 */
 
-    /* The number of out and in parameter for a call.  */
-    unsigned calli  : 4;        /* 12 */
-    unsigned callo  : 2;        /* 14 */
-    unsigned        : 2;        /* 16 */
-
-    /* Index of the prev/next op, or 0 for the end of the list.  */
-    unsigned prev   : 16;       /* 32 */
-    unsigned next   : 16;       /* 48 */
+    /* Parameters for this opcode.  See below.  */
+    unsigned param1 : 4;        /* 12 */
+    unsigned param2 : 4;        /* 16 */
 
     /* Lifetime data of the operands.  */
-    unsigned life   : 16;       /* 64 */
+    unsigned life   : 16;       /* 32 */
+
+    /* Next and previous opcodes.  */
+    QTAILQ_ENTRY(TCGOp) link;
 
     /* Arguments for the opcode.  */
     TCGArg args[MAX_OPC_PARAM];
 } TCGOp;
 
-/* Make sure that we don't expand the structure without noticing.  */
-QEMU_BUILD_BUG_ON(sizeof(TCGOp) != 8 + sizeof(TCGArg) * MAX_OPC_PARAM);
+#define TCGOP_CALLI(X)    (X)->param1
+#define TCGOP_CALLO(X)    (X)->param2
 
 /* Make sure operands fit in the bitfields above.  */
 QEMU_BUILD_BUG_ON(NB_OPS > (1 << 8));
-QEMU_BUILD_BUG_ON(OPC_BUF_SIZE > (1 << 16));
 
 typedef struct TCGProfile {
     int64_t tb_count1;
@@ -651,8 +644,6 @@ struct TCGContext {
     int goto_tb_issue_mask;
 #endif
 
-    int gen_next_op_idx;
-
     /* Code generation.  Note that we specifically do not use tcg_insn_unit
        here, because there's too much arithmetic throughout that relies
        on addition and subtraction working on bytes.  Rely on the GCC
@@ -683,12 +674,12 @@ struct TCGContext {
     TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
 
+    QTAILQ_HEAD(TCGOpHead, TCGOp) ops, free_ops;
+
     /* Tells which temporary holds a given register.
        It does not take into account fixed registers */
     TCGTemp *reg_to_temp[TCG_TARGET_NB_REGS];
 
-    TCGOp gen_op_buf[OPC_BUF_SIZE];
-
     uint16_t gen_insn_end_off[TCG_MAX_INSNS];
     target_ulong gen_insn_data[TCG_MAX_INSNS][TARGET_INSN_START_WORDS];
 };
@@ -778,21 +769,21 @@ static inline TCGv_i32 TCGV_HIGH(TCGv_i64 t)
 }
 #endif
 
-static inline void tcg_set_insn_param(int op_idx, int arg, TCGArg v)
+static inline void tcg_set_insn_param(TCGOp *op, int arg, TCGArg v)
 {
-    tcg_ctx->gen_op_buf[op_idx].args[arg] = v;
+    op->args[arg] = v;
 }
 
-/* The number of opcodes emitted so far.  */
-static inline int tcg_op_buf_count(void)
+/* The last op that was emitted.  */
+static inline TCGOp *tcg_last_op(void)
 {
-    return tcg_ctx->gen_next_op_idx;
+    return QTAILQ_LAST(&tcg_ctx->ops, TCGOpHead);
 }
 
 /* Test for whether to terminate the TB for using too many opcodes.  */
 static inline bool tcg_op_buf_full(void)
 {
-    return tcg_op_buf_count() >= OPC_MAX_SIZE;
+    return false;
 }
 
 /* pool based memory allocation */
@@ -976,6 +967,7 @@ bool tcg_op_supported(TCGOpcode op);
 
 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args);
 
+TCGOp *tcg_emit_op(TCGOpcode opc);
 void tcg_op_remove(TCGContext *s, TCGOp *op);
 TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc, int narg);
 TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc, int narg);
diff --git a/tcg/tci.c b/tcg/tci.c
index 63f2cd5..33edca1 100644
--- a/tcg/tci.c
+++ b/tcg/tci.c
@@ -40,7 +40,7 @@
         tcg_abort(); \
     } while (0)
 
-#if MAX_OPC_PARAM_IARGS != 5
+#if MAX_OPC_PARAM_IARGS != 6
 # error Fix needed, number of supported input arguments changed!
 #endif
 #if TCG_TARGET_REG_BITS == 32
@@ -48,11 +48,12 @@ typedef uint64_t (*helper_function)(tcg_target_ulong, tcg_target_ulong,
                                     tcg_target_ulong, tcg_target_ulong,
                                     tcg_target_ulong, tcg_target_ulong,
                                     tcg_target_ulong, tcg_target_ulong,
+                                    tcg_target_ulong, tcg_target_ulong,
                                     tcg_target_ulong, tcg_target_ulong);
 #else
 typedef uint64_t (*helper_function)(tcg_target_ulong, tcg_target_ulong,
                                     tcg_target_ulong, tcg_target_ulong,
-                                    tcg_target_ulong);
+                                    tcg_target_ulong, tcg_target_ulong);
 #endif
 
 static tcg_target_ulong tci_read_reg(const tcg_target_ulong *regs, TCGReg index)
@@ -520,7 +521,9 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
                                           tci_read_reg(regs, TCG_REG_R7),
                                           tci_read_reg(regs, TCG_REG_R8),
                                           tci_read_reg(regs, TCG_REG_R9),
-                                          tci_read_reg(regs, TCG_REG_R10));
+                                          tci_read_reg(regs, TCG_REG_R10),
+                                          tci_read_reg(regs, TCG_REG_R11),
+                                          tci_read_reg(regs, TCG_REG_R12));
             tci_write_reg(regs, TCG_REG_R0, tmp64);
             tci_write_reg(regs, TCG_REG_R1, tmp64 >> 32);
 #else
@@ -528,7 +531,8 @@ uintptr_t tcg_qemu_tb_exec(CPUArchState *env, uint8_t *tb_ptr)
                                           tci_read_reg(regs, TCG_REG_R1),
                                           tci_read_reg(regs, TCG_REG_R2),
                                           tci_read_reg(regs, TCG_REG_R3),
-                                          tci_read_reg(regs, TCG_REG_R5));
+                                          tci_read_reg(regs, TCG_REG_R5),
+                                          tci_read_reg(regs, TCG_REG_R6));
             tci_write_reg(regs, TCG_REG_R0, tmp64);
 #endif
             break;
diff --git a/tcg/tci/tcg-target.inc.c b/tcg/tci/tcg-target.inc.c
index 913c380..cc949be 100644
--- a/tcg/tci/tcg-target.inc.c
+++ b/tcg/tci/tcg-target.inc.c
@@ -292,7 +292,7 @@ static const int tcg_target_reg_alloc_order[] = {
 #endif
 };
 
-#if MAX_OPC_PARAM_IARGS != 5
+#if MAX_OPC_PARAM_IARGS != 6
 # error Fix needed, number of supported input arguments changed!
 #endif
 
@@ -305,14 +305,16 @@ static const int tcg_target_call_iarg_regs[] = {
     TCG_REG_R4,
 #endif
     TCG_REG_R5,
+    TCG_REG_R6,
 #if TCG_TARGET_REG_BITS == 32
     /* 32 bit hosts need 2 * MAX_OPC_PARAM_IARGS registers. */
-    TCG_REG_R6,
     TCG_REG_R7,
 #if TCG_TARGET_NB_REGS >= 16
     TCG_REG_R8,
     TCG_REG_R9,
     TCG_REG_R10,
+    TCG_REG_R11,
+    TCG_REG_R12,
 #else
 # error Too few input registers available
 #endif