New testcase that crashes the loop extractor

llvm-svn: 12399

1 files changed, 27 insertions, 0 deletions

diff --git a/llvm/test/Regression/Transforms/CodeExtractor/2004-03-14-NoSwitchSupport.ll b/llvm/test/Regression/Transforms/CodeExtractor/2004-03-14-NoSwitchSupport.ll
new file mode 100644
index 00000000000..71445557f43
--- /dev/null
+++ b/llvm/test/Regression/Transforms/CodeExtractor/2004-03-14-NoSwitchSupport.ll
@@ -0,0 +1,27 @@
+; RUN: llvm-as < %s | opt -loop-extract-single -disable-output
+
+void %ab() {
+entry:
+	br label %codeReplTail
+
+then.1:		; preds = %codeReplTail
+	br label %loopentry.1
+
+loopentry.1:		; preds = %loopentry.1.preheader, %no_exit.1
+	br bool false, label %no_exit.1, label %loopexit.0.loopexit1
+
+no_exit.1:		; preds = %loopentry.1
+	br label %loopentry.1
+
+loopexit.0.loopexit:		; preds = %codeReplTail
+	ret void
+
+loopexit.0.loopexit1:		; preds = %loopentry.1
+	ret void
+
+codeReplTail:		; preds = %codeRepl, %codeReplTail
+	switch ushort 0, label %codeReplTail [
+		 ushort 0, label %loopexit.0.loopexit
+		 ushort 1, label %then.1
+	]
+}