Don't skip over instructions other than loads that might read memory
when trying to sink stores.
llvm-svn: 52259
diff --git a/llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll b/llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll
new file mode 100644
index 0000000..3f23098
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/2008-06-13-ReadOnlyCallStore.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | 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
+