| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test that the strpbrk library call simplifier works correctly. |
| ; |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| 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" |
| |
| @hello = constant [12 x i8] c"hello world\00" |
| @w = constant [2 x i8] c"w\00" |
| @null = constant [1 x i8] zeroinitializer |
| |
| declare i8* @strpbrk(i8*, i8*) |
| |
| ; Check strpbrk(s, "") -> NULL. |
| |
| define i8* @test_simplify1(i8* %str) { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 |
| |
| %ret = call i8* @strpbrk(i8* %str, i8* %pat) |
| ret i8* %ret |
| } |
| |
| ; Check strpbrk("", s) -> NULL. |
| |
| define i8* @test_simplify2(i8* %pat) { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: ret i8* null |
| ; |
| %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 |
| |
| %ret = call i8* @strpbrk(i8* %str, i8* %pat) |
| ret i8* %ret |
| } |
| |
| ; Check strpbrk(s1, s2), where s1 and s2 are constants. |
| |
| define i8* @test_simplify3() { |
| ; CHECK-LABEL: @test_simplify3( |
| ; CHECK-NEXT: ret i8* getelementptr inbounds ([12 x i8], [12 x i8]* @hello, i32 0, i32 6) |
| ; |
| %str = getelementptr [12 x i8], [12 x i8]* @hello, i32 0, i32 0 |
| %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0 |
| |
| %ret = call i8* @strpbrk(i8* %str, i8* %pat) |
| ret i8* %ret |
| } |
| |
| ; Check strpbrk(s, "a") -> strchr(s, 'a'). |
| |
| define i8* @test_simplify4(i8* %str) { |
| ; CHECK-LABEL: @test_simplify4( |
| ; CHECK-NEXT: [[STRCHR:%.*]] = call i8* @strchr(i8* noundef nonnull dereferenceable(1) [[STR:%.*]], i32 119) |
| ; CHECK-NEXT: ret i8* [[STRCHR]] |
| ; |
| %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0 |
| |
| %ret = call i8* @strpbrk(i8* %str, i8* %pat) |
| ret i8* %ret |
| } |
| |
| ; Check cases that shouldn't be simplified. |
| |
| define i8* @test_no_simplify1(i8* %str, i8* %pat) { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; CHECK-NEXT: [[RET:%.*]] = call i8* @strpbrk(i8* [[STR:%.*]], i8* [[PAT:%.*]]) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| |
| %ret = call i8* @strpbrk(i8* %str, i8* %pat) |
| ret i8* %ret |
| } |