vpblend intrinsics combines as shifts intrinsics due to absence return stmt between...

Fix PR20088

Differential Revision: http://reviews.llvm.org/D4277

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211617 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index e3fd0ceae319c5bafb70172fb33d292e40f2c9e8..874257f212496c95eff8ba583acd4a3effeb7613 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -19188,6 +19188,8 @@ static SDValue PerformINTRINSIC_WO_CHAINCombine(SDNode *N, SelectionDAG &DAG,
       if (C->isAllOnesValue())
         return Op1;
     }
+
+    return SDValue();
   }
 
   // Packed SSE2/AVX2 arithmetic shift immediate intrinsics.

diff --git a/test/CodeGen/X86/pr20088.ll b/test/CodeGen/X86/pr20088.ll
new file mode 100644 (file)
index 0000000..d7aab7f
--- /dev/null
+++ b/test/CodeGen/X86/pr20088.ll
@@ -0,0 +1,9 @@
+; RUN: llc < %s -mattr=+avx | FileCheck %s
+
+declare <16 x i8> @llvm.x86.sse41.pblendvb(<16 x i8>, <16 x i8>, <16 x i8>)
+
+define <16 x i8> @foo(<16 x i8> %x) {
+; CHECK: vpblendvb
+  %res = call <16 x i8> @llvm.x86.sse41.pblendvb(<16 x i8> zeroinitializer, <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> %x)
+  ret <16 x i8> %res;
+}