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X86: Pattern match scalar loads + vcvtph2ps into just vcvtph2ps.

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vcvtph2ps only reads the lower 64 bits of the address passed to the
intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206579 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2014-04-18 10:45:33 +00:00
parent 64eed05a3a
commit c32e261a1a
2 changed files with 20 additions and 0 deletions
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6
lib/Target/X86/X86InstrSSE.td
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@@ -8304,6 +8304,12 @@ let Predicates = [HasF16C] in {
defm VCVTPH2PSY : f16c_ph2ps<VR256, f128mem, int_x86_vcvtph2ps_256>, VEX_L;
defm VCVTPS2PH : f16c_ps2ph<VR128, f64mem, int_x86_vcvtps2ph_128>;
defm VCVTPS2PHY : f16c_ps2ph<VR256, f128mem, int_x86_vcvtps2ph_256>, VEX_L;
// Pattern match vcvtph2ps of a scalar i64 load.
def : Pat<(int_x86_vcvtph2ps_128 (vzmovl_v2i64 addr:$src)),
(VCVTPH2PSrm addr:$src)>;
def : Pat<(int_x86_vcvtph2ps_128 (vzload_v2i64 addr:$src)),
(VCVTPH2PSrm addr:$src)>;
}
//===----------------------------------------------------------------------===//