From f065f05397d0a46482f3dd1ebad31cb2d27bd236 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 4 Aug 2005 22:49:32 +0000
Subject: [PATCH] add a testcase nate requested
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22663 91177308-0d34-0410-b5e6-96231b3b80d8
---
test/Transforms/CondProp/phisimplify.ll | 33 +++++++++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 test/Transforms/CondProp/phisimplify.ll
diff --git a/test/Transforms/CondProp/phisimplify.ll b/test/Transforms/CondProp/phisimplify.ll
new file mode 100644
index 00000000000..818bcab40d2
--- /dev/null
+++ b/test/Transforms/CondProp/phisimplify.ll
@@ -0,0 +1,33 @@
+; RUN: llvm-as < %s | opt -condprop | llvm-dis | not grep phi
+
+int %test(uint %C, bool %Val) {
+ switch uint %C, label %T1 [
+ uint 4, label %T2
+ uint 17, label %T3
+ ]
+T1:
+ call void %a()
+ br label %Cont
+T2:
+ call void %b()
+ br label %Cont
+T3:
+ call void %c()
+ br label %Cont
+
+Cont:
+ ;; PHI becomes dead after threading T2
+ %C2 = phi bool [%Val, %T1], [true, %T2], [%Val, %T3]
+ br bool %C2, label %L2, label %F2
+L2:
+ call void %d()
+ ret int 17
+F2:
+ call void %e()
+ ret int 1
+}
+declare void %a()
+declare void %b()
+declare void %c()
+declare void %d()
+declare void %e()