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re PR tree-optimization/50873 (The fix to PR50730 causes gcc.c-torture/unsorted/dilayout.c to ICE)

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gcc/
	PR middle-end/50873
	* optabs.c (maybe_legitimize_operand_same_code): Use copy_to_mode_reg
	instead of force_reg.  Do nothing if the address is already a
	non-virtual pseudo register.

From-SVN: r182244
This commit is contained in:
Richard Sandiford 2011-12-12 15:18:24 +00:00 committed by Richard Sandiford
parent c9556982a7
commit 431e1124ed
2 changed files with 28 additions and 14 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2011-12-12 Richard Sandiford <richard.sandiford@linaro.org>
PR middle-end/50873
* optabs.c (maybe_legitimize_operand_same_code): Use copy_to_mode_reg
instead of force_reg. Do nothing if the address is already a
non-virtual pseudo register.
2011-12-12 Torvald Riegel <triegel@redhat.com>
* gimplify.c (voidify_wrapper_expr): Add default handling for

35
gcc/optabs.c
View File

@ -8242,24 +8242,31 @@ maybe_legitimize_operand_same_code (enum insn_code icode, unsigned int opno,
return true;
/* If the operand is a memory whose address has no side effects,
try forcing the address into a register. The check for side
effects is important because force_reg cannot handle things
like auto-modified addresses. */
if (insn_data[(int) icode].operand[opno].allows_mem
&& MEM_P (op->value)
&& !side_effects_p (XEXP (op->value, 0)))
try forcing the address into a non-virtual pseudo register.
The check for side effects is important because copy_to_mode_reg
cannot handle things like auto-modified addresses. */
if (insn_data[(int) icode].operand[opno].allows_mem && MEM_P (op->value))
{
rtx addr, mem, last;
rtx addr, mem;
last = get_last_insn ();
addr = force_reg (Pmode, XEXP (op->value, 0));
mem = replace_equiv_address (op->value, addr);
if (insn_operand_matches (icode, opno, mem))
mem = op->value;
addr = XEXP (mem, 0);
if (!(REG_P (addr) && REGNO (addr) > LAST_VIRTUAL_REGISTER)
&& !side_effects_p (addr))
{
op->value = mem;
return true;
rtx last;
enum machine_mode mode;
last = get_last_insn ();
mode = targetm.addr_space.address_mode (MEM_ADDR_SPACE (mem));
mem = replace_equiv_address (mem, copy_to_mode_reg (mode, addr));
if (insn_operand_matches (icode, opno, mem))
{
op->value = mem;
return true;
}
delete_insns_since (last);
}
delete_insns_since (last);
}
return false;