Fixed lowering of v816 shuffles.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63252 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index f48d752..6ec97e2 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -3677,7 +3677,7 @@ SDValue LowerVECTOR_SHUFFLEv8i16(SDValue V1, SDValue V2,
       ++V2InOrder;
     } else if (EltIdx < 8) {
       V1Elts.push_back(Elt);
-      V2Elts.push_back(DAG.getConstant(i+8, MaskEVT));
+      V2Elts.push_back(DAG.getConstant(EltIdx+8, MaskEVT));
       ++V1FromV1;
     } else {
       V1Elts.push_back(Elt);

diff --git a/test/CodeGen/X86/vec_shuffle-29.ll b/test/CodeGen/X86/vec_shuffle-29.ll
new file mode 100644 (file)
index 0000000..aac63c3
--- /dev/null
+++ b/test/CodeGen/X86/vec_shuffle-29.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | llc -march=x86 -mattr=sse41 -disable-mmx -o %t -f
+; RUN: not grep pextrw %t
+; RUN: grep pinsrw %t
+
+; Test for v8xi16 lowering where we extract the first element of the vector and
+; placed it in the second element of the result.
+
+define void @test_cl(<8 x i16> addrspace(1)* %dest, <8 x i16> addrspace(1)* %old) nounwind {
+entry:
+       %tmp3 = load <8 x i16> addrspace(1)* %old               ; <<8 x i16>> [#uses=1]
+       %tmp6 = shufflevector <8 x i16> %tmp3, <8 x i16> < i16 0, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef, i16 undef >, <8 x i32> < i32 8, i32 0, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef  >          ; <<8 x i16>> [#uses=1]
+       store <8 x i16> %tmp6, <8 x i16> addrspace(1)* %dest
+       ret void
+}
\ No newline at end of file