; Test that the strchr library call simplifier works correctly. ; RUN: opt < %s -instcombine -S | FileCheck %s target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" @hello = constant [14 x i8] c"hello world\5Cn\00" @null = constant [1 x i8] zeroinitializer @chp = global i8* zeroinitializer declare i8* @strchr(i8*, i32) define void @test_simplify1() { ; CHECK: store i8* getelementptr inbounds ([14 x i8]* @hello, i32 0, i32 6) ; CHECK-NOT: call i8* @strchr ; CHECK: ret void %str = getelementptr [14 x i8]* @hello, i32 0, i32 0 %dst = call i8* @strchr(i8* %str, i32 119) store i8* %dst, i8** @chp ret void } define void @test_simplify2() { ; CHECK: store i8* null, i8** @chp, align 4 ; CHECK-NOT: call i8* @strchr ; CHECK: ret void %str = getelementptr [1 x i8]* @null, i32 0, i32 0 %dst = call i8* @strchr(i8* %str, i32 119) store i8* %dst, i8** @chp ret void } define void @test_simplify3() { ; CHECK: store i8* getelementptr inbounds ([14 x i8]* @hello, i32 0, i32 13) ; CHECK-NOT: call i8* @strchr ; CHECK: ret void %src = getelementptr [14 x i8]* @hello, i32 0, i32 0 %dst = call i8* @strchr(i8* %src, i32 0) store i8* %dst, i8** @chp ret void } define void @test_simplify4(i32 %chr) { ; CHECK: call i8* @memchr ; CHECK-NOT: call i8* @strchr ; CHECK: ret void %src = getelementptr [14 x i8]* @hello, i32 0, i32 0 %dst = call i8* @strchr(i8* %src, i32 %chr) store i8* %dst, i8** @chp ret void } define void @test_simplify5() { ; CHECK: store i8* getelementptr inbounds ([14 x i8]* @hello, i32 0, i32 13) ; CHECK-NOT: call i8* @strchr ; CHECK: ret void %src = getelementptr [14 x i8]* @hello, i32 0, i32 0 %dst = call i8* @strchr(i8* %src, i32 65280) store i8* %dst, i8** @chp ret void } ; Check transformation strchr(p, 0) -> p + strlen(p) define void @test_simplify6(i8* %str) { ; CHECK: %strlen = call i32 @strlen(i8* %str) ; CHECK-NOT: call i8* @strchr ; CHECK: %strchr = getelementptr i8* %str, i32 %strlen ; CHECK: store i8* %strchr, i8** @chp, align 4 ; CHECK: ret void %dst = call i8* @strchr(i8* %str, i32 0) store i8* %dst, i8** @chp ret void }