36 lines
1.7 KiB
LLVM
36 lines
1.7 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -relocation-model=pic -mtriple=x86_64-unknown-unknown -mattr=+ssse3 < %s | FileCheck %s
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; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+ssse3 < %s | FileCheck %s
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; Verify that the backend correctly folds the shuffle in function 'fold_pshufb'
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; into a simple load from constant pool.
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define <2 x i64> @fold_pshufb() {
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; CHECK-LABEL: fold_pshufb:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: movaps {{.*#+}} xmm0 = [0,0,0,0,1,0,0,0,2,0,0,0,3,0,0,0]
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; CHECK-NEXT: retq
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entry:
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%0 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> <i8 0, i8 0, i8 0, i8 0, i8 1, i8 0, i8 0, i8 0, i8 2, i8 0, i8 0, i8 0, i8 3, i8 0, i8 0, i8 0>, <16 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15>)
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%1 = bitcast <16 x i8> %0 to <2 x i64>
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ret <2 x i64> %1
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}
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; The pshufb from function @pr24562 was wrongly folded into its first operand
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; as a result of a late target shuffle combine on the legalized selection dag.
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;
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; Check that the pshufb is correctly folded to a zero vector.
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define <2 x i64> @pr24562() {
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; CHECK-LABEL: pr24562:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xorps %xmm0, %xmm0
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; CHECK-NEXT: retq
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entry:
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%0 = call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> <i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1>, <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>) #2
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%1 = bitcast <16 x i8> %0 to <2 x i64>
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ret <2 x i64> %1
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}
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declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>)
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