From 741c0aea08feab0ebd1932aaa8dd38836b2073ea Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 29 Dec 2007 00:59:12 +0000
Subject: dead calls to llvm.stacksave can be deleted, even though they have
 potential side-effects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45392 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstCombine/deadcode.ll | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'test')

diff --git a/test/Transforms/InstCombine/deadcode.ll b/test/Transforms/InstCombine/deadcode.ll
index 6ff5ae8..43c1793 100644
--- a/test/Transforms/InstCombine/deadcode.ll
+++ b/test/Transforms/InstCombine/deadcode.ll
@@ -1,4 +1,5 @@
 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {ret i32 %A}
+; RUN: llvm-as < %s | opt -die | llvm-dis | not grep call.*llvm.stacksave
 
 define i32 @test(i32 %A) {
 	%X = or i1 false, false		
@@ -12,3 +13,12 @@ C:		; preds = %T, %0
 	%C.upgrd.1 = phi i32 [ %B, %T ], [ %A, %0 ]
 	ret i32 %C.upgrd.1
 }
+
+define i32* @test2(i32 %width) {
+	%tmp = call i8* @llvm.stacksave( )
+        %tmp14 = alloca i32, i32 %width
+	ret i32* %tmp14
+} 
+
+declare i8* @llvm.stacksave()
+
-- 
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