; Test that the StrRChrOptimizer works correctly
; RUN: opt < %s -simplify-libcalls -S | FileCheck %s

target datalayout = "-p:64:64:64"

@hello = constant [14 x i8] c"hello world\5Cn\00"
@null = constant [1 x i8] zeroinitializer

declare i8* @strrchr(i8*, i32)

define void @foo(i8* %bar) {
	%hello_p = getelementptr [14 x i8]* @hello, i32 0, i32 0
	%null_p = getelementptr [1 x i8]* @null, i32 0, i32 0
	%world = call i8* @strrchr(i8* %hello_p, i32 119)
; CHECK: getelementptr i8* %hello_p, i64 6
	%ignore = call i8* @strrchr(i8* %null_p, i32 119)
; CHECK-NOT: call i8* strrchr
	%null = call i8* @strrchr(i8* %hello_p, i32 0)
; CHECK: getelementptr i8* %hello_p, i64 13
	%strchr = call i8* @strrchr(i8* %bar, i32 0)
; CHECK: call i8* @strchr(i8* %bar, i32 0)
	ret void
}