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author | Richard Henderson <richard.henderson@linaro.org> | 2023-03-03 13:47:27 -0800 |
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committer | Richard Henderson <richard.henderson@linaro.org> | 2023-03-05 13:44:07 -0800 |
commit | f85b1fc4a0a572b0b92f5199deac1fb57e6f2aa3 (patch) | |
tree | 5dcbb497577b31738aaf50bc5429632f257c5bb5 /tcg/tcg-op.c | |
parent | 533206f0520e2d46362e4e6d920c8b9fa7ec1bb4 (diff) | |
download | qemu-f85b1fc4a0a572b0b92f5199deac1fb57e6f2aa3.zip qemu-f85b1fc4a0a572b0b92f5199deac1fb57e6f2aa3.tar.gz qemu-f85b1fc4a0a572b0b92f5199deac1fb57e6f2aa3.tar.bz2 |
tcg: Link branches to the labels
This allows us to easily find all branches that use a label.
Since 'refs' is only tested vs zero, remove it and test for
an empty list instead. Drop the use of bitfields, which had
been used to pack refs into a single 32-bit word.
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg/tcg-op.c')
-rw-r--r-- | tcg/tcg-op.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index f2269a1..77658a8 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -84,6 +84,22 @@ void tcg_gen_op6(TCGOpcode opc, TCGArg a1, TCGArg a2, TCGArg a3, op->args[5] = a6; } +/* Generic ops. */ + +static void add_last_as_label_use(TCGLabel *l) +{ + TCGLabelUse *u = tcg_malloc(sizeof(TCGLabelUse)); + + u->op = tcg_last_op(); + QSIMPLEQ_INSERT_TAIL(&l->branches, u, next); +} + +void tcg_gen_br(TCGLabel *l) +{ + tcg_gen_op1(INDEX_op_br, label_arg(l)); + add_last_as_label_use(l); +} + void tcg_gen_mb(TCGBar mb_type) { if (tcg_ctx->gen_tb->cflags & CF_PARALLEL) { @@ -216,8 +232,8 @@ void tcg_gen_brcond_i32(TCGCond cond, TCGv_i32 arg1, TCGv_i32 arg2, TCGLabel *l) if (cond == TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond != TCG_COND_NEVER) { - l->refs++; tcg_gen_op4ii_i32(INDEX_op_brcond_i32, arg1, arg2, cond, label_arg(l)); + add_last_as_label_use(l); } } @@ -1474,7 +1490,6 @@ void tcg_gen_brcond_i64(TCGCond cond, TCGv_i64 arg1, TCGv_i64 arg2, TCGLabel *l) if (cond == TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond != TCG_COND_NEVER) { - l->refs++; if (TCG_TARGET_REG_BITS == 32) { tcg_gen_op6ii_i32(INDEX_op_brcond2_i32, TCGV_LOW(arg1), TCGV_HIGH(arg1), TCGV_LOW(arg2), @@ -1483,6 +1498,7 @@ void tcg_gen_brcond_i64(TCGCond cond, TCGv_i64 arg1, TCGv_i64 arg2, TCGLabel *l) tcg_gen_op4ii_i64(INDEX_op_brcond_i64, arg1, arg2, cond, label_arg(l)); } + add_last_as_label_use(l); } } @@ -1493,12 +1509,12 @@ void tcg_gen_brcondi_i64(TCGCond cond, TCGv_i64 arg1, int64_t arg2, TCGLabel *l) } else if (cond == TCG_COND_ALWAYS) { tcg_gen_br(l); } else if (cond != TCG_COND_NEVER) { - l->refs++; tcg_gen_op6ii_i32(INDEX_op_brcond2_i32, TCGV_LOW(arg1), TCGV_HIGH(arg1), tcg_constant_i32(arg2), tcg_constant_i32(arg2 >> 32), cond, label_arg(l)); + add_last_as_label_use(l); } } |