New testcase that crashes the -lowerswitch pass

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12383 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LowerSwitch/2004-03-13-SwitchIsDefaultCrash.ll b/test/Transforms/LowerSwitch/2004-03-13-SwitchIsDefaultCrash.ll
new file mode 100644 (file)
index 0000000..4c412aa
--- /dev/null
+++ b/test/Transforms/LowerSwitch/2004-03-13-SwitchIsDefaultCrash.ll
@@ -0,0 +1,21 @@
+; RUN: llvm-as < %s | opt -lowerswitch -disable-output
+
+void %solve() {
+entry:
+       %targetBlock = call ushort %solve_code( )               ; <ushort> [#uses=1]
+       br label %codeReplTail
+
+then.1:                ; preds = %codeReplTail
+       ret void
+
+loopexit.0:            ; preds = %codeReplTail
+       ret void
+
+codeReplTail:          ; preds = %entry, %codeReplTail
+       switch ushort %targetBlock, label %codeReplTail [
+                ushort 0, label %loopexit.0
+                ushort 1, label %then.1
+       ]
+}
+
+declare ushort %solve_code()