diff options
| author | Michael Liao <michael.liao@intel.com> | 2012-08-31 20:12:31 +0000 |
|---|---|---|
| committer | Michael Liao <michael.liao@intel.com> | 2012-08-31 20:12:31 +0000 |
| commit | 265bcb1e5b106a7c5db2bfcfb13cceffe0c413be (patch) | |
| tree | 4b71ac71eae05fb78c0c2225f0dc2e843c84bd53 /test/CodeGen | |
| parent | 3185f9a2ea80afec30064b7cd095f82c31dc154e (diff) | |
Fix PR12359
- In addition to undefined, if V2 is zero vector, skip 2nd PSHUFB and POR as
well as PSHUFB will zero elements with negative indices.
Patch by Sriram Murali <sriram.murali@intel.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163018 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/X86/pr12359.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/CodeGen/X86/pr12359.ll b/test/CodeGen/X86/pr12359.ll new file mode 100644 index 0000000000..024b163fa7 --- /dev/null +++ b/test/CodeGen/X86/pr12359.ll @@ -0,0 +1,10 @@ +; RUN: llc -asm-verbose -mtriple=x86_64-unknown-unknown -mcpu=corei7 < %s | FileCheck %s +define <16 x i8> @shuf(<16 x i8> %inval1) { +entry: + %0 = shufflevector <16 x i8> %inval1, <16 x i8> zeroinitializer, <16 x i32> <i32 0, i32 4, i32 3, i32 2, i32 16, i32 16, i32 3, i32 4, i32 0, i32 4, i32 3, i32 2, i32 16, i32 16, i32 3, i32 4> + ret <16 x i8> %0 +; CHECK: shuf +; CHECK: # BB#0: # %entry +; CHECK-NEXT: pshufb +; CHECK-NEXT: ret +} |