1; Test that the strchr library call simplifier works correctly. 2; RUN: opt < %s -instcombine -S | FileCheck %s 3 4target 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" 5 6@hello = constant [14 x i8] c"hello world\5Cn\00" 7@null = constant [1 x i8] zeroinitializer 8@chp = global i8* zeroinitializer 9 10declare i8* @strchr(i8*, i32) 11 12define void @test_simplify1() { 13; CHECK: store i8* getelementptr inbounds ([14 x i8]* @hello, i32 0, i32 6) 14; CHECK-NOT: call i8* @strchr 15; CHECK: ret void 16 17 %str = getelementptr [14 x i8]* @hello, i32 0, i32 0 18 %dst = call i8* @strchr(i8* %str, i32 119) 19 store i8* %dst, i8** @chp 20 ret void 21} 22 23define void @test_simplify2() { 24; CHECK: store i8* null, i8** @chp, align 4 25; CHECK-NOT: call i8* @strchr 26; CHECK: ret void 27 28 %str = getelementptr [1 x i8]* @null, i32 0, i32 0 29 %dst = call i8* @strchr(i8* %str, i32 119) 30 store i8* %dst, i8** @chp 31 ret void 32} 33 34define void @test_simplify3() { 35; CHECK: store i8* getelementptr inbounds ([14 x i8]* @hello, i32 0, i32 13) 36; CHECK-NOT: call i8* @strchr 37; CHECK: ret void 38 39 %src = getelementptr [14 x i8]* @hello, i32 0, i32 0 40 %dst = call i8* @strchr(i8* %src, i32 0) 41 store i8* %dst, i8** @chp 42 ret void 43} 44 45define void @test_simplify4(i32 %chr) { 46; CHECK: call i8* @memchr 47; CHECK-NOT: call i8* @strchr 48; CHECK: ret void 49 50 %src = getelementptr [14 x i8]* @hello, i32 0, i32 0 51 %dst = call i8* @strchr(i8* %src, i32 %chr) 52 store i8* %dst, i8** @chp 53 ret void 54} 55 56define void @test_simplify5() { 57; CHECK: store i8* getelementptr inbounds ([14 x i8]* @hello, i32 0, i32 13) 58; CHECK-NOT: call i8* @strchr 59; CHECK: ret void 60 61 %src = getelementptr [14 x i8]* @hello, i32 0, i32 0 62 %dst = call i8* @strchr(i8* %src, i32 65280) 63 store i8* %dst, i8** @chp 64 ret void 65} 66 67; Check transformation strchr(p, 0) -> p + strlen(p) 68define void @test_simplify6(i8* %str) { 69; CHECK: %strlen = call i32 @strlen(i8* %str) 70; CHECK-NOT: call i8* @strchr 71; CHECK: %strchr = getelementptr i8* %str, i32 %strlen 72; CHECK: store i8* %strchr, i8** @chp, align 4 73; CHECK: ret void 74 75 %dst = call i8* @strchr(i8* %str, i32 0) 76 store i8* %dst, i8** @chp 77 ret void 78} 79