New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27570 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/vec_shuffle.ll b/test/Transforms/InstCombine/vec_shuffle.ll
new file mode 100644 (file)
index 0000000..09e9a6a
--- /dev/null
+++ b/test/Transforms/InstCombine/vec_shuffle.ll
@@ -0,0 +1,17 @@
+; RUN: llvm-as < %s | opt -instcombine -disable-output &&
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep vector_shuffle
+
+%T = type <4 x float>
+
+implementation
+
+%T %test1(%T %v1) {
+  %v2 = shufflevector %T %v1, %T undef, <4 x uint> <uint 0, uint 1, uint 2, uint 3>
+  ret %T %v2
+}
+
+%T %test2(%T %v1) {
+  %v2 = shufflevector %T %v1, %T %v1, <4 x uint> <uint 0, uint 5, uint 2, uint 7>
+  ret %T %v2
+}
+