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For FMA4, force all operands into registers.

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2009-12-02  Richard Henderson  <rth@redhat.com>

	* config/i386/i386.c (ix86_fixup_binary_operands): For FMA4, force
	all operands into registers.

From-SVN: r154969
This commit is contained in:
Richard Henderson 2009-12-03 21:27:02 -08:00 committed by Sebastian Pop
parent 80c0adc635
commit aa356b75ed
2 changed files with 15 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2009-12-02 Richard Henderson <rth@redhat.com>
* config/i386/i386.c (ix86_fixup_binary_operands): For FMA4, force
all operands into registers.
2009-12-02 Sebastian Pop <sebastian.pop@amd.com>
* config/i386/i386.c (ix86_expand_fma4_multiple_memory): Remove unused

10
gcc/config/i386/i386.c
View File

@ -13384,6 +13384,16 @@ ix86_fixup_binary_operands (enum rtx_code code, enum machine_mode mode,
if (MEM_P (src1) && !rtx_equal_p (dst, src1))
src1 = force_reg (mode, src1);
/* In order for the multiply-add patterns to get matched, we need
to aid combine by forcing all operands into registers to start. */
if (optimize && TARGET_FMA4)
{
if (MEM_P (src2))
src2 = force_reg (GET_MODE (src2), src2);
else if (MEM_P (src1))
src1 = force_reg (GET_MODE (src1), src1);
}
operands[1] = src1;
operands[2] = src2;
return dst;