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