New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2695 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/GCSE/2002-05-21-NoSharedDominator.ll b/test/Transforms/GCSE/2002-05-21-NoSharedDominator.ll
new file mode 100644 (file)
index 0000000..1f4ec5b
--- /dev/null
+++ b/test/Transforms/GCSE/2002-05-21-NoSharedDominator.ll
@@ -0,0 +1,13 @@
+; This testcase shows a bug where an common subexpression exists, but there
+; is no shared dominator block that the expression can be hoisted out to.
+;
+; RUN: as < %s | opt -gcse | dis
+
+int "test"(int %X, int %Y) {
+       %Z = add int %X, %Y
+       ret int %Z
+
+Unreachable:
+       %Q = add int %X, %Y
+       ret int %Q
+}