1; Test that the strpbrk library call simplifier works correctly. 2; 3; RUN: opt < %s -instcombine -S | FileCheck %s 4 5target 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 11declare i8* @strpbrk(i8*, i8*) 12 13; Check strpbrk(s, "") -> NULL. 14 15define i8* @test_simplify1(i8* %str) { 16; CHECK-LABEL: @test_simplify1( 17 %pat = getelementptr [1 x i8], [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 26define i8* @test_simplify2(i8* %pat) { 27; CHECK-LABEL: @test_simplify2( 28 %str = getelementptr [1 x i8], [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 37define i8* @test_simplify3() { 38; CHECK-LABEL: @test_simplify3( 39 %str = getelementptr [12 x i8], [12 x i8]* @hello, i32 0, i32 0 40 %pat = getelementptr [2 x i8], [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], [12 x i8]* @hello, i32 0, i32 6) 45} 46 47; Check strpbrk(s, "a") -> strchr(s, 'a'). 48 49define i8* @test_simplify4(i8* %str) { 50; CHECK-LABEL: @test_simplify4( 51 %pat = getelementptr [2 x i8], [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 61define 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