1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test that the strpbrk library call simplifier works correctly. 3; 4; RUN: opt < %s -instcombine -S | FileCheck %s 5 6target 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" 7 8@hello = constant [12 x i8] c"hello world\00" 9@w = constant [2 x i8] c"w\00" 10@null = constant [1 x i8] zeroinitializer 11 12declare i8* @strpbrk(i8*, i8*) 13 14; Check strpbrk(s, "") -> NULL. 15 16define i8* @test_simplify1(i8* %str) { 17; CHECK-LABEL: @test_simplify1( 18; CHECK-NEXT: ret i8* null 19; 20 %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 21 22 %ret = call i8* @strpbrk(i8* %str, i8* %pat) 23 ret i8* %ret 24} 25 26; Check strpbrk("", s) -> NULL. 27 28define i8* @test_simplify2(i8* %pat) { 29; CHECK-LABEL: @test_simplify2( 30; CHECK-NEXT: ret i8* null 31; 32 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 33 34 %ret = call i8* @strpbrk(i8* %str, i8* %pat) 35 ret i8* %ret 36} 37 38; Check strpbrk(s1, s2), where s1 and s2 are constants. 39 40define i8* @test_simplify3() { 41; CHECK-LABEL: @test_simplify3( 42; CHECK-NEXT: ret i8* getelementptr inbounds ([12 x i8], [12 x i8]* @hello, i32 0, i32 6) 43; 44 %str = getelementptr [12 x i8], [12 x i8]* @hello, i32 0, i32 0 45 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0 46 47 %ret = call i8* @strpbrk(i8* %str, i8* %pat) 48 ret i8* %ret 49} 50 51; Check strpbrk(s, "a") -> strchr(s, 'a'). 52 53define i8* @test_simplify4(i8* %str) { 54; CHECK-LABEL: @test_simplify4( 55; CHECK-NEXT: [[STRCHR:%.*]] = call i8* @strchr(i8* nonnull dereferenceable(1) [[STR:%.*]], i32 119) 56; CHECK-NEXT: ret i8* [[STRCHR]] 57; 58 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0 59 60 %ret = call i8* @strpbrk(i8* %str, i8* %pat) 61 ret i8* %ret 62} 63 64; Check cases that shouldn't be simplified. 65 66define i8* @test_no_simplify1(i8* %str, i8* %pat) { 67; CHECK-LABEL: @test_no_simplify1( 68; CHECK-NEXT: [[RET:%.*]] = call i8* @strpbrk(i8* [[STR:%.*]], i8* [[PAT:%.*]]) 69; CHECK-NEXT: ret i8* [[RET]] 70; 71 72 %ret = call i8* @strpbrk(i8* %str, i8* %pat) 73 ret i8* %ret 74} 75