fix an infinite loop in reassociate building emacs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92679 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/test/Transforms/Reassociate/crash.ll b/test/Transforms/Reassociate/crash.ll
new file mode 100644
index 0000000000..12f8a376fd
--- /dev/null
+++ b/test/Transforms/Reassociate/crash.ll
@@ -0,0 +1,15 @@
+; RUN: opt -reassociate -disable-output %s
+
+
+; rdar://7507855
+define fastcc i32 @test() nounwind {
+entry:
+  %cond = select i1 undef, i32 1, i32 -1          ; <i32> [#uses=2]
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.body, %entry
+  %sub889 = sub i32 undef, undef                  ; <i32> [#uses=1]
+  %sub891 = sub i32 %sub889, %cond                ; <i32> [#uses=0]
+  %add896 = sub i32 0, %cond                      ; <i32> [#uses=0]
+  ret i32 undef
+}