new testcase, vector operations should be CSE'd

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27690 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/GCSE/vectorops.ll b/test/Transforms/GCSE/vectorops.ll
new file mode 100644 (file)
index 0000000..4178960
--- /dev/null
+++ b/test/Transforms/GCSE/vectorops.ll
@@ -0,0 +1,26 @@
+; RUN: llvm-as < %s | opt -gcse -instcombine -disable-output &&
+; RUN: llvm-as < %s | opt -gcse -instcombine | llvm-dis | not grep sub
+
+uint %test_extractelement(<4 x uint> %V) {
+        %R = extractelement <4 x uint> %V, uint 1
+        %R2 = extractelement <4 x uint> %V, uint 1
+       %V = sub uint %R, %R2
+        ret uint %V
+}
+
+<4 x uint> %test_insertelement(<4 x uint> %V) {
+        %R = insertelement <4 x uint> %V, uint 0, uint 0
+        %R2 = insertelement <4 x uint> %V, uint 0, uint 0
+       %x = sub <4 x uint> %R, %R2
+        ret <4 x uint> %x
+}
+
+<4 x uint> %test_shufflevector(<4 x uint> %V) {
+        %R = shufflevector <4 x uint> %V, <4 x uint> %V, 
+                  <4 x uint> < uint 1, uint undef, uint 7, uint 2>
+        %R2 = shufflevector <4 x uint> %V, <4 x uint> %V, 
+                   <4 x uint> < uint 1, uint undef, uint 7, uint 2>
+       %x = sub <4 x uint> %R, %R2
+        ret <4 x uint> %x
+}
+