1 ; Test that the strchr library call simplifier works correctly. 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 4 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" 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 10 declare i8* @strchr(i8*, i32) 11 12 define 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 23 define 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 34 define 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 45 define 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 56 define 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) 68 define 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
