From: Owen Anderson <resistor@mac.com>
Date: Tue, 2 Dec 2008 04:25:42 +0000 (+0000)
Subject: Add a test for my previous PRE fix.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=e209d9a3e6c8a1b3e75e42546adc99e17da075a7;p=oota-llvm.git

Add a test for my previous PRE fix.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60394 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/Transforms/GVN/pre.ll b/test/Transforms/GVN/pre.ll
new file mode 100644
index 00000000000..f00bda3c446
--- /dev/null
+++ b/test/Transforms/GVN/pre.ll
@@ -0,0 +1,27 @@
+; RUN: llvm-as < %s | opt -gvn -enable-pre | llvm-dis | grep {.pre}
+
+@H = common global i32 0		; <i32*> [#uses=2]
+@G = common global i32 0		; <i32*> [#uses=1]
+
+define i32 @test() nounwind {
+entry:
+	%0 = load i32* @H, align 4		; <i32> [#uses=2]
+	%1 = call i32 (...)* @foo() nounwind		; <i32> [#uses=1]
+	%2 = icmp ne i32 %1, 0		; <i1> [#uses=1]
+	br i1 %2, label %bb, label %bb1
+
+bb:		; preds = %entry
+	%3 = add i32 %0, 42		; <i32> [#uses=1]
+	store i32 %3, i32* @G, align 4
+	br label %bb1
+
+bb1:		; preds = %bb, %entry
+	%4 = add i32 %0, 42		; <i32> [#uses=1]
+	store i32 %4, i32* @H, align 4
+	br label %return
+
+return:		; preds = %bb1
+	ret i32 0
+}
+
+declare i32 @foo(...)