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[X86] Add an additional isel pattern to CVTDQ2PDrm/VCVTDQ2PDrm to enable load folding without the peephole pass. 

This pattern is already used in AVX512VL version of these instructions. Though AVX512VL version is missing other patterns.

llvm-svn: 315794
This commit is contained in:
Craig Topper 2017-10-14 04:18:06 +00:00
parent e55d9a1403
commit 53b0cb7fa9
1 changed files with 6 additions and 2 deletions
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8
llvm/lib/Target/X86/X86InstrSSE.td
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@ -1955,7 +1955,7 @@ let hasSideEffects = 0, mayLoad = 1 in
def VCVTDQ2PDrm : S2SI<0xE6, MRMSrcMem, (outs VR128:$dst), (ins i64mem:$src),
"vcvtdq2pd\t{$src, $dst|$dst, $src}",
[(set VR128:$dst,
(v2f64 (X86VSintToFP (bc_v4i32 (v2i64 (X86vzload addr:$src))))))]>,
(v2f64 (X86VSintToFP (bc_v4i32 (loadv2i64 addr:$src)))))]>,
VEX, Sched<[WriteCvtI2FLd]>, VEX_WIG;
def VCVTDQ2PDrr : S2SI<0xE6, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
"vcvtdq2pd\t{$src, $dst|$dst, $src}",
@ -1978,7 +1978,7 @@ let hasSideEffects = 0, mayLoad = 1 in
def CVTDQ2PDrm : S2SI<0xE6, MRMSrcMem, (outs VR128:$dst), (ins i64mem:$src),
"cvtdq2pd\t{$src, $dst|$dst, $src}",
[(set VR128:$dst,
(v2f64 (X86VSintToFP (bc_v4i32 (v2i64 (X86vzload addr:$src))))))],
(v2f64 (X86VSintToFP (bc_v4i32 (loadv2i64 addr:$src)))))],
IIC_SSE_CVT_PD_RR>, Sched<[WriteCvtI2FLd]>;
def CVTDQ2PDrr : S2SI<0xE6, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
"cvtdq2pd\t{$src, $dst|$dst, $src}",
@ -1990,12 +1990,16 @@ def CVTDQ2PDrr : S2SI<0xE6, MRMSrcReg, (outs VR128:$dst), (ins VR128:$src),
let Predicates = [HasAVX, NoVLX] in {
def : Pat<(v2f64 (X86VSintToFP (bc_v4i32 (v2i64 (scalar_to_vector (loadi64 addr:$src)))))),
(VCVTDQ2PDrm addr:$src)>;
def : Pat<(v2f64 (X86VSintToFP (bc_v4i32 (v2i64 (X86vzload addr:$src))))),
(VCVTDQ2PDrm addr:$src)>;
} // Predicates = [HasAVX, NoVLX]
// SSE2 register conversion intrinsics
let Predicates = [UseSSE2] in {
def : Pat<(v2f64 (X86VSintToFP (bc_v4i32 (v2i64 (scalar_to_vector (loadi64 addr:$src)))))),
(CVTDQ2PDrm addr:$src)>;
def : Pat<(v2f64 (X86VSintToFP (bc_v4i32 (v2i64 (X86vzload addr:$src))))),
(CVTDQ2PDrm addr:$src)>;
} // Predicates = [UseSSE2]
// Convert packed double to packed single