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llvm/test/Transforms/InstCombine/x86-muldq.ll
Craig Topper b7ae55eb2c [InstCombine][X86] Add DemandedElts support for 512-bit PMULDQ/PMULUDQ instructions 
PMULDQ/PMULUDQ vXi64 instructions only use the even numbered v2Xi32 input elements which SimplifyDemandedVectorElts should try and use.

This builds on r290554 which added supported for 128 and 256-bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290582 91177308-0d34-0410-b5e6-96231b3b80d8
2016-12-27 05:30:09 +00:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
;
; PMULUDQ/PMULDQ - only the even elements (0, 2, 4, 6) of the vXi32 inputs are required.
;
define <2 x i64> @test_demanded_elts_pmuludq_128(<4 x i32> %a0, <4 x i32> %a1) {
; CHECK-LABEL: @test_demanded_elts_pmuludq_128(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <4 x i32> %a1, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i64> @llvm.x86.sse2.pmulu.dq(<4 x i32> %a0, <4 x i32> [[TMP1]])
; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <2 x i64> [[TMP2]], <2 x i64> undef, <2 x i32> zeroinitializer
; CHECK-NEXT: ret <2 x i64> [[TMP3]]
;
%1 = shufflevector <4 x i32> %a0, <4 x i32> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
%2 = shufflevector <4 x i32> %a1, <4 x i32> undef, <4 x i32> <i32 1, i32 1, i32 3, i32 3>
%3 = call <2 x i64> @llvm.x86.sse2.pmulu.dq(<4 x i32> %1, <4 x i32> %2)
%4 = shufflevector <2 x i64> %3, <2 x i64> undef, <2 x i32> zeroinitializer
ret <2 x i64> %4
}
define <4 x i64> @test_demanded_elts_pmuludq_256(<8 x i32> %a0, <8 x i32> %a1) {
; CHECK-LABEL: @test_demanded_elts_pmuludq_256(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <8 x i32> %a1, <8 x i32> undef, <8 x i32> <i32 1, i32 undef, i32 3, i32 undef, i32 5, i32 undef, i32 7, i32 undef>
; CHECK-NEXT: [[TMP2:%.*]] = call <4 x i64> @llvm.x86.avx2.pmulu.dq(<8 x i32> %a0, <8 x i32> [[TMP1]])
; CHECK-NEXT: ret <4 x i64> [[TMP2]]
;
%1 = shufflevector <8 x i32> %a0, <8 x i32> undef, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6>
%2 = shufflevector <8 x i32> %a1, <8 x i32> undef, <8 x i32> <i32 1, i32 1, i32 3, i32 3, i32 5, i32 5, i32 7, i32 7>
%3 = call <4 x i64> @llvm.x86.avx2.pmulu.dq(<8 x i32> %1, <8 x i32> %2)
ret <4 x i64> %3
}
define <8 x i64> @test_demanded_elts_pmuludq_512(<16 x i32> %a0, <16 x i32> %a1) {
; CHECK-LABEL: @test_demanded_elts_pmuludq_512(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <16 x i32> %a1, <16 x i32> undef, <16 x i32> <i32 1, i32 undef, i32 3, i32 undef, i32 5, i32 undef, i32 7, i32 undef, i32 9, i32 undef, i32 11, i32 undef, i32 13, i32 undef, i32 15, i32 undef>
; CHECK-NEXT: [[TMP2:%.*]] = call <8 x i64> @llvm.x86.avx512.pmulu.dq.512(<16 x i32> %a0, <16 x i32> [[TMP1]])
; CHECK-NEXT: ret <8 x i64> [[TMP2]]
;
%1 = shufflevector <16 x i32> %a0, <16 x i32> undef, <16 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6, i32 8, i32 8, i32 10, i32 10, i32 12, i32 12, i32 14, i32 14>
%2 = shufflevector <16 x i32> %a1, <16 x i32> undef, <16 x i32> <i32 1, i32 1, i32 3, i32 3, i32 5, i32 5, i32 7, i32 7, i32 9, i32 9, i32 11, i32 11, i32 13, i32 13, i32 15, i32 15>
%3 = call <8 x i64> @llvm.x86.avx512.pmulu.dq.512(<16 x i32> %1, <16 x i32> %2)
ret <8 x i64> %3
}
define <2 x i64> @test_demanded_elts_pmuldq_128(<4 x i32> %a0, <4 x i32> %a1) {
; CHECK-LABEL: @test_demanded_elts_pmuldq_128(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <4 x i32> %a1, <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 3, i32 undef>
; CHECK-NEXT: [[TMP2:%.*]] = call <2 x i64> @llvm.x86.sse41.pmuldq(<4 x i32> %a0, <4 x i32> [[TMP1]])
; CHECK-NEXT: ret <2 x i64> [[TMP2]]
;
%1 = shufflevector <4 x i32> %a0, <4 x i32> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
%2 = shufflevector <4 x i32> %a1, <4 x i32> undef, <4 x i32> <i32 1, i32 1, i32 3, i32 3>
%3 = call <2 x i64> @llvm.x86.sse41.pmuldq(<4 x i32> %1, <4 x i32> %2)
ret <2 x i64> %3
}
define <4 x i64> @test_demanded_elts_pmuluq_256(<8 x i32> %a0, <8 x i32> %a1) {
; CHECK-LABEL: @test_demanded_elts_pmuluq_256(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <8 x i32> %a1, <8 x i32> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 7, i32 undef>
; CHECK-NEXT: [[TMP2:%.*]] = call <4 x i64> @llvm.x86.avx2.pmul.dq(<8 x i32> %a0, <8 x i32> [[TMP1]])
; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <4 x i64> [[TMP2]], <4 x i64> undef, <4 x i32> <i32 0, i32 0, i32 3, i32 3>
; CHECK-NEXT: ret <4 x i64> [[TMP3]]
;
%1 = shufflevector <8 x i32> %a0, <8 x i32> undef, <8 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6>
%2 = shufflevector <8 x i32> %a1, <8 x i32> undef, <8 x i32> <i32 1, i32 1, i32 3, i32 3, i32 5, i32 5, i32 7, i32 7>
%3 = call <4 x i64> @llvm.x86.avx2.pmul.dq(<8 x i32> %1, <8 x i32> %2)
%4 = shufflevector <4 x i64> %3, <4 x i64> undef, <4 x i32> <i32 0, i32 0, i32 3, i32 3>
ret <4 x i64> %4
}
define <8 x i64> @test_demanded_elts_pmuluq_512(<16 x i32> %a0, <16 x i32> %a1) {
; CHECK-LABEL: @test_demanded_elts_pmuluq_512(
; CHECK-NEXT: [[TMP1:%.*]] = shufflevector <16 x i32> %a1, <16 x i32> undef, <16 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 7, i32 undef, i32 9, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 15, i32 undef>
; CHECK-NEXT: [[TMP2:%.*]] = call <8 x i64> @llvm.x86.avx512.pmul.dq.512(<16 x i32> %a0, <16 x i32> [[TMP1]])
; CHECK-NEXT: [[TMP3:%.*]] = shufflevector <8 x i64> [[TMP2]], <8 x i64> undef, <8 x i32> <i32 0, i32 0, i32 3, i32 3, i32 4, i32 4, i32 7, i32 7>
; CHECK-NEXT: ret <8 x i64> [[TMP3]]
;
%1 = shufflevector <16 x i32> %a0, <16 x i32> undef, <16 x i32> <i32 0, i32 0, i32 2, i32 2, i32 4, i32 4, i32 6, i32 6, i32 8, i32 8, i32 10, i32 10, i32 12, i32 12, i32 14, i32 14>
%2 = shufflevector <16 x i32> %a1, <16 x i32> undef, <16 x i32> <i32 1, i32 1, i32 3, i32 3, i32 5, i32 5, i32 7, i32 7, i32 9, i32 9, i32 11, i32 11, i32 13, i32 13, i32 15, i32 15>
%3 = call <8 x i64> @llvm.x86.avx512.pmul.dq.512(<16 x i32> %1, <16 x i32> %2)
%4 = shufflevector <8 x i64> %3, <8 x i64> undef, <8 x i32> <i32 0, i32 0, i32 3, i32 3, i32 4, i32 4, i32 7, i32 7>
ret <8 x i64> %4
}
declare <2 x i64> @llvm.x86.sse2.pmulu.dq(<4 x i32>, <4 x i32>) nounwind readnone
declare <2 x i64> @llvm.x86.sse41.pmuldq(<4 x i32>, <4 x i32>) nounwind readnone
declare <4 x i64> @llvm.x86.avx2.pmulu.dq(<8 x i32>, <8 x i32>) nounwind readnone
declare <4 x i64> @llvm.x86.avx2.pmul.dq(<8 x i32>, <8 x i32>) nounwind readnone
declare <8 x i64> @llvm.x86.avx512.pmulu.dq.512(<16 x i32>, <16 x i32>) nounwind readnone
declare <8 x i64> @llvm.x86.avx512.pmul.dq.512(<16 x i32>, <16 x i32>) nounwind readnone
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