From 476983ab8cc765cfb88c9b49d82edf5c4ab85e25 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 20 Jun 2008 05:12:56 +0000
Subject: Fix PR2471, which is a bug involving an invalid promotion from a
conditional load.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52525 91177308-0d34-0410-b5e6-96231b3b80d8
---
test/Transforms/InstCombine/2008-06-19-UncondLoad.ll | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
create mode 100644 test/Transforms/InstCombine/2008-06-19-UncondLoad.ll
(limited to 'test')
diff --git a/test/Transforms/InstCombine/2008-06-19-UncondLoad.ll b/test/Transforms/InstCombine/2008-06-19-UncondLoad.ll
new file mode 100644
index 0000000..fa3dc0a
--- /dev/null
+++ b/test/Transforms/InstCombine/2008-06-19-UncondLoad.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep load | count 3
+; PR2471
+
+declare i32 @x(i32*)
+define i32 @b(i32* %a, i32* %b) {
+entry:
+ %tmp1 = load i32* %a
+ %tmp3 = load i32* %b
+ %add = add i32 %tmp1, %tmp3
+ %call = call i32 @x( i32* %a )
+ %tobool = icmp ne i32 %add, 0
+ ; not safe to turn into an uncond load
+ %cond = select i1 %tobool, i32* %b, i32* %a
+ %tmp8 = load i32* %cond
+ ret i32 %tmp8
+}
--
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