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Diffstat (limited to 'llvm/test/CodeGen/X86/pr24562.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/pr24562.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/pr24562.ll b/llvm/test/CodeGen/X86/pr24562.ll new file mode 100644 index 00000000000..f2e134bbd07 --- /dev/null +++ b/llvm/test/CodeGen/X86/pr24562.ll @@ -0,0 +1,19 @@ +; RUN: llc -mattr=+ssse3 -mtriple=x86_64-unknown-unknown < %s | FileCheck %s + +; The pshufb from function @pr24562 was wrongly folded into its first operand +; as a result of a late target shuffle combine on the legalized selection dag. +; +; Check that the pshufb is correctly folded to a zero vector. + +define <2 x i64> @pr24562() { +; CHECK-LABEL: pr24562: +; CHECK: # BB#0: # %entry +; CHECK-NEXT: xorps %xmm0, %xmm0 +; CHECK-NEXT: retq +entry: + %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 + %1 = bitcast <16 x i8> %0 to <2 x i64> + ret <2 x i64> %1 +} + +declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>) |
