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| author | Richard Henderson <rth@redhat.com> | 2009-12-03 21:27:02 -0800 |
|---|---|---|
| committer | Sebastian Pop <spop@gcc.gnu.org> | 2009-12-04 05:27:02 +0000 |
| commit | aa356b75ed99be1a2e60fbe7d77a95bc4ae2811c (patch) | |
| tree | adfb6be751e51461568782abc3fbb2ea6a6293ca /gcc | |
| parent | 80c0adc635c392856f1a5ef0d89d8dd62ac960c1 (diff) | |
| download | gcc-aa356b75ed99be1a2e60fbe7d77a95bc4ae2811c.zip gcc-aa356b75ed99be1a2e60fbe7d77a95bc4ae2811c.tar.gz gcc-aa356b75ed99be1a2e60fbe7d77a95bc4ae2811c.tar.bz2 | |
For FMA4, force all operands into registers.
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/i386/i386.c | 10 |
2 files changed, 15 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ceb7ba7..16e80f1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 82ec08f..436e935 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -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; |