1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test that the strcspn library call simplifier works correctly. 3; 4; RUN: opt < %s -instcombine -S | FileCheck %s 5 6target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 7 8@abcba = constant [6 x i8] c"abcba\00" 9@abc = constant [4 x i8] c"abc\00" 10@null = constant [1 x i8] zeroinitializer 11 12declare i64 @strcspn(i8*, i8*) 13 14; Check strcspn(s, "") -> strlen(s). 15 16define i64 @test_simplify1(i8* %str) { 17; CHECK-LABEL: @test_simplify1( 18; CHECK-NEXT: [[STRLEN:%.*]] = call i64 @strlen(i8* nonnull dereferenceable(1) [[STR:%.*]]) 19; CHECK-NEXT: ret i64 [[STRLEN]] 20; 21 %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 22 23 %ret = call i64 @strcspn(i8* %str, i8* %pat) 24 ret i64 %ret 25} 26 27; Check strcspn("", s) -> 0. 28 29define i64 @test_simplify2(i8* %pat) { 30; CHECK-LABEL: @test_simplify2( 31; CHECK-NEXT: ret i64 0 32; 33 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 34 35 %ret = call i64 @strcspn(i8* %str, i8* %pat) 36 ret i64 %ret 37} 38 39; Check strcspn(s1, s2), where s1 and s2 are constants. 40 41define i64 @test_simplify3() { 42; CHECK-LABEL: @test_simplify3( 43; CHECK-NEXT: ret i64 0 44; 45 %str = getelementptr [6 x i8], [6 x i8]* @abcba, i32 0, i32 0 46 %pat = getelementptr [4 x i8], [4 x i8]* @abc, i32 0, i32 0 47 48 %ret = call i64 @strcspn(i8* %str, i8* %pat) 49 ret i64 %ret 50} 51 52; Check cases that shouldn't be simplified. 53 54define i64 @test_no_simplify1(i8* %str, i8* %pat) { 55; CHECK-LABEL: @test_no_simplify1( 56; CHECK-NEXT: [[RET:%.*]] = call i64 @strcspn(i8* [[STR:%.*]], i8* [[PAT:%.*]]) 57; CHECK-NEXT: ret i64 [[RET]] 58; 59 60 %ret = call i64 @strcspn(i8* %str, i8* %pat) 61 ret i64 %ret 62} 63