From 283dda16ab75eb1ac697b99cc00089a4767c7bd9 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 5 Mar 2003 20:22:50 +0000
Subject: [PATCH] Add testcase for new feature for simplifycfg pass

llvm-svn: 5697
---
 .../Transforms/SimplifyCFG/PhiBlockMerge.ll   | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 llvm/test/Regression/Transforms/SimplifyCFG/PhiBlockMerge.ll

diff --git a/llvm/test/Regression/Transforms/SimplifyCFG/PhiBlockMerge.ll b/llvm/test/Regression/Transforms/SimplifyCFG/PhiBlockMerge.ll
new file mode 100644
index 000000000000..d1df2a17b7d7
--- /dev/null
+++ b/llvm/test/Regression/Transforms/SimplifyCFG/PhiBlockMerge.ll
@@ -0,0 +1,26 @@
+; Test merging of blocks that only have PHI nodes in them
+;
+; RUN: if as < %s | opt -simplifycfg | dis | grep 'N:'
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+;
+
+int %test(bool %a, bool %b) {
+        br bool %a, label %M, label %O
+
+O:
+	br bool %b, label %N, label %Q
+Q:
+	br label %N
+N:
+	%Wp = phi int [0, %O], [1, %Q]
+	; This block should be foldable into M
+	br label %M
+
+M:
+	%W = phi int [%Wp, %N], [2, %0]
+	%R = add int %W, 1
+	ret int %R
+}
+