diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/i960/i960.c | 18 |
2 files changed, 19 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index eb30326..13f3151 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2002-10-07 Richard Henderson <rth@redhat.com> + * config/i960/i960.c (i960_setup_incoming_varargs): Create a + new rtx for comparing the argument pointer against zero. + (i960_va_start): Similarly. + +2002-10-07 Richard Henderson <rth@redhat.com> + * config/i960/i960.md (*): Use TFmode, not XFmode. * config/i960/i960.c (*): Likewise. (i960_arg_size_and_align): Remove XFmode alignment hack. diff --git a/gcc/config/i960/i960.c b/gcc/config/i960/i960.c index bde6710..f353c72 100644 --- a/gcc/config/i960/i960.c +++ b/gcc/config/i960/i960.c @@ -2552,16 +2552,20 @@ i960_setup_incoming_varargs (cum, mode, type, pretend_size, no_rtl) if (cum->ca_nstackparms == 0 && first_reg < NPARM_REGS && !no_rtl) { rtx label = gen_label_rtx (); - rtx regblock; + rtx regblock, fake_arg_pointer_rtx; - /* If arg_pointer_rtx == 0, no arguments were passed on the stack + /* Use a different rtx than arg_pointer_rtx so that cse and friends + can go on believing that the argument pointer can never be zero. */ + fake_arg_pointer_rtx = gen_raw_REG (Pmode, ARG_POINTER_REGNUM); + + /* If the argument pointer is 0, no arguments were passed on the stack and we need to allocate a chunk to save the registers (if any arguments were passed on the stack the caller would allocate the 48 bytes as well). We must allocate all 48 bytes (12*4) because va_start assumes it. */ - emit_insn (gen_cmpsi (arg_pointer_rtx, const0_rtx)); + emit_insn (gen_cmpsi (fake_arg_pointer_rtx, const0_rtx)); emit_jump_insn (gen_bne (label)); - emit_insn (gen_rtx_SET (VOIDmode, arg_pointer_rtx, + emit_insn (gen_rtx_SET (VOIDmode, fake_arg_pointer_rtx, stack_pointer_rtx)); emit_insn (gen_rtx_SET (VOIDmode, stack_pointer_rtx, memory_address (SImode, @@ -2598,6 +2602,7 @@ i960_va_start (valist, nextarg) rtx nextarg ATTRIBUTE_UNUSED; { tree s, t, base, num; + rtx fake_arg_pointer_rtx; /* The array type always decays to a pointer before we get here, so we can't use ARRAY_REF. */ @@ -2606,7 +2611,10 @@ i960_va_start (valist, nextarg) build (PLUS_EXPR, unsigned_type_node, valist, TYPE_SIZE_UNIT (TREE_TYPE (valist)))); - s = make_tree (unsigned_type_node, arg_pointer_rtx); + /* Use a different rtx than arg_pointer_rtx so that cse and friends + can go on believing that the argument pointer can never be zero. */ + fake_arg_pointer_rtx = gen_raw_REG (Pmode, ARG_POINTER_REGNUM); + s = make_tree (unsigned_type_node, fake_arg_pointer_rtx); t = build (MODIFY_EXPR, unsigned_type_node, base, s); TREE_SIDE_EFFECTS (t) = 1; expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); |