From c2f33f24afdba9813a202bb1b8f9ee5480863c69 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 13 Dec 2008 18:39:44 +0000
Subject: [PATCH] gvn should never crash on this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60987 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/GVN/2008-12-12-RLE-Crash.ll | 35 +++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 test/Transforms/GVN/2008-12-12-RLE-Crash.ll

diff --git a/test/Transforms/GVN/2008-12-12-RLE-Crash.ll b/test/Transforms/GVN/2008-12-12-RLE-Crash.ll
new file mode 100644
index 00000000000..99fadc716c7
--- /dev/null
+++ b/test/Transforms/GVN/2008-12-12-RLE-Crash.ll
@@ -0,0 +1,35 @@
+; RUN: llvm-as < %s | opt -gvn | llvm-dis
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin7"
+
+define i32 @main(i32 %argc, i8** %argv) nounwind {
+entry:
+	br label %bb84
+
+bb41:		; preds = %bb82
+	%tmp = load i8* %opt.0, align 1		; <i8> [#uses=0]
+	%tmp1 = getelementptr i8* %opt.0, i32 1		; <i8*> [#uses=2]
+	switch i32 0, label %bb81 [
+		i32 102, label %bb82
+		i32 110, label %bb79
+		i32 118, label %bb80
+	]
+
+bb79:		; preds = %bb41
+	br label %bb82
+
+bb80:		; preds = %bb41
+	ret i32 0
+
+bb81:		; preds = %bb41
+	ret i32 1
+
+bb82:		; preds = %bb84, %bb79, %bb41
+	%opt.0 = phi i8* [ %tmp3, %bb84 ], [ %tmp1, %bb79 ], [ %tmp1, %bb41 ]		; <i8*> [#uses=3]
+	%tmp2 = load i8* %opt.0, align 1		; <i8> [#uses=0]
+	br i1 false, label %bb84, label %bb41
+
+bb84:		; preds = %bb82, %entry
+	%tmp3 = getelementptr i8* null, i32 1		; <i8*> [#uses=1]
+	br label %bb82
+}