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[AVX512] Pull pattern for subvector extract into the instruction definition

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No functional change.

I initially thought that pulling the Pat<> into the instruction pattern was
not possible because it was doing a transform on the index in order to convert
it from a per-element (extract_subvector) index into a per-chunk (vextract*x4)
index.

Turns out this also works inside the pattern because the vextract_extract
PatFrag has an OperandTransform EXTRACT_get_vextract{128,256}_imm, so the
index in $idx goes through the same conversion.

The existing test CodeGen/X86/avx512-insert-extract.ll extended in the
previous commit provides coverage for this change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218480 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adam Nemet 2014-09-25 23:48:49 +00:00
parent 2f3ccfc257
commit 08f261afbf
1 changed files with 6 additions and 9 deletions
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15
lib/Target/X86/X86InstrAVX512.td
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@ -422,10 +422,12 @@ multiclass vextract_for_size<int Opcode,
SDNodeXForm EXTRACT_get_vextract_imm> {
let hasSideEffects = 0, ExeDomain = To.ExeDomain in {
def rr : AVX512AIi8<Opcode, MRMDestReg, (outs To.RC:$dst),
(ins VR512:$src1, i8imm:$src2),
"vextract" # To.EltTypeName # "x4\t{$src2, $src1, $dst|"
"$dst, $src1, $src2}",
[]>, EVEX, EVEX_V512;
(ins VR512:$src1, i8imm:$idx),
"vextract" # To.EltTypeName # "x4\t{$idx, $src1, $dst|"
"$dst, $src1, $idx}",
[(set To.RC:$dst, (vextract_extract:$idx (From.VT VR512:$src1),
(iPTR imm)))]>,
EVEX, EVEX_V512;
let mayStore = 1 in
def rm : AVX512AIi8<Opcode, MRMDestMem, (outs),
(ins To.MemOp:$dst, VR512:$src1, i8imm:$src2),
@ -434,11 +436,6 @@ multiclass vextract_for_size<int Opcode,
[]>, EVEX, EVEX_V512, EVEX_CD8<To.EltSize, CD8VT4>;
}
// Codegen pattern, e.g. v16i32 -> v4i32 for vextracti32x4
def : Pat<(vextract_extract:$ext (From.VT VR512:$src1), (iPTR imm)),
(To.VT (!cast<Instruction>(NAME # To.EltSize # "x4rr") VR512:$src1,
(EXTRACT_get_vextract_imm To.RC:$ext)))>;
// Codegen pattern with the alternative types, e.g. v8i64 -> v2i64 for
// vextracti32x4
def : Pat<(vextract_extract:$ext (AltFrom.VT VR512:$src1), (iPTR imm)),