vendor/llvm/llvm-r72732

1 files changed, 22 insertions, 0 deletions

diff --git a/test/Transforms/SimplifyLibCalls/StrChr.ll b/test/Transforms/SimplifyLibCalls/StrChr.ll
new file mode 100644
index 0000000000000..802639f723208
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/StrChr.ll
@@ -0,0 +1,22 @@
+; Test that the StrChrOptimizer works correctly
+; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
+; RUN:   not grep {call.*@strchr}
+
+@hello = constant [14 x i8] c"hello world\5Cn\00"		; <[14 x i8]*> [#uses=1]
+@null = constant [1 x i8] zeroinitializer		; <[1 x i8]*> [#uses=1]
+
+declare i8* @strchr(i8*, i32)
+
+declare i32 @puts(i8*)
+
+define i32 @main() {
+	%hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0		; <i8*> [#uses=2]
+	%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0		; <i8*> [#uses=1]
+	%world = call i8* @strchr( i8* %hello_p, i32 119 )		; <i8*> [#uses=1]
+	%ignore = call i8* @strchr( i8* %null_p, i32 119 )		; <i8*> [#uses=0]
+	%len = call i32 @puts( i8* %world )		; <i32> [#uses=1]
+	%index = add i32 %len, 112		; <i32> [#uses=2]
+	%result = call i8* @strchr( i8* %hello_p, i32 %index )		; <i8*> [#uses=0]
+	ret i32 %index
+}
+