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diff test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll	Thu Dec 12 13:56:28 2013 +0900
@@ -0,0 +1,19 @@
+; RUN: opt < %s -instcombine -S | grep "store i8" | count 2
+
+define i32 @a(i8* %s) nounwind  {
+entry:
+	store i8 0, i8* %s, align 1 ; This store cannot be eliminated!
+	%tmp3 = call i32 @strlen( i8* %s ) nounwind readonly
+	%tmp5 = icmp ne i32 %tmp3, 0
+	br i1 %tmp5, label %bb, label %bb8
+
+bb:		; preds = %entry
+	store i8 0, i8* %s, align 1
+	br label %bb8
+
+bb8:
+	ret i32 %tmp3
+}
+
+declare i32 @strlen(i8*) nounwind readonly 
+