6ce08672fb
As detailed on PR40730, we are not correctly filling in the lane shuffle mask (D53148/rL344446) - we fill in for the correct src lane but don't add it to the correct mask element, so any reference to the correct element is likely to see an UNDEF mask index. This allows constant folding to propagate UNDEFs prior to the lane mask being (correctly) lowered to vperm2f128. This patch fixes the issue by fully populating the lane shuffle mask - this is more than is necessary (if we only filled in the required mask elements we might be able to match other shuffle instructions - broadcasts etc.), but its the most cautious approach as this needs to be cherrypicked into the 8.0.0 release branch. Differential Revision: https://reviews.llvm.org/D58237 llvm-svn: 354117
37 lines
1.7 KiB
LLVM
37 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s
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define <8 x i32> @shuffle_v8i32_0dcd3f14(<8 x i32> %a, <8 x i32> %b) {
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; CHECK-LABEL: shuffle_v8i32_0dcd3f14:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vextractf128 $1, %ymm0, %xmm2
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; CHECK-NEXT: vblendps {{.*#+}} xmm2 = xmm2[0],xmm0[1,2,3]
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; CHECK-NEXT: vpermilps {{.*#+}} xmm2 = xmm2[3,1,1,0]
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; CHECK-NEXT: vinsertf128 $1, %xmm2, %ymm0, %ymm0
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; CHECK-NEXT: vperm2f128 {{.*#+}} ymm1 = ymm1[2,3,2,3]
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; CHECK-NEXT: vpermilpd {{.*#+}} ymm1 = ymm1[0,0,3,2]
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; CHECK-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0],ymm1[1,2,3],ymm0[4],ymm1[5],ymm0[6,7]
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; CHECK-NEXT: retq
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%shuffle = shufflevector <8 x i32> %a, <8 x i32> %b, <8 x i32> <i32 0, i32 13, i32 12, i32 13, i32 3, i32 15, i32 1, i32 4>
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ret <8 x i32> %shuffle
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}
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; CHECK: .LCPI1_0:
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; CHECK-NEXT: .quad 60129542157
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; CHECK-NEXT: .quad 60129542157
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; CHECK-NEXT: .quad 68719476736
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; CHECK-NEXT: .quad 60129542157
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define <8 x i32> @shuffle_v8i32_0dcd3f14_constant(<8 x i32> %a0) {
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; CHECK-LABEL: shuffle_v8i32_0dcd3f14_constant:
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; CHECK: # %bb.0:
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; CHECK-NEXT: vextractf128 $1, %ymm0, %xmm1
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; CHECK-NEXT: vblendps {{.*#+}} xmm1 = xmm1[0],xmm0[1,2,3]
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; CHECK-NEXT: vpermilps {{.*#+}} xmm1 = xmm1[3,1,1,0]
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; CHECK-NEXT: vinsertf128 $1, %xmm1, %ymm0, %ymm0
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; CHECK-NEXT: vblendps {{.*#+}} ymm0 = ymm0[0],mem[1,2,3],ymm0[4],mem[5],ymm0[6,7]
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; CHECK-NEXT: retq
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%res = shufflevector <8 x i32> %a0, <8 x i32> <i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16>, <8 x i32> <i32 0, i32 13, i32 12, i32 13, i32 3, i32 15, i32 1, i32 4>
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ret <8 x i32> %res
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}
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