Meador Inge | 7629de3 | 2012-11-08 01:33:50 +0000 | [diff] [blame] | 1 | ; Test that the strspn 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 | @abcba = constant [6 x i8] c"abcba\00" |
| 8 | @abc = constant [4 x i8] c"abc\00" |
| 9 | @null = constant [1 x i8] zeroinitializer |
| 10 | |
| 11 | declare i64 @strspn(i8*, i8*) |
| 12 | |
| 13 | ; Check strspn(s, "") -> 0. |
| 14 | |
| 15 | define i64 @test_simplify1(i8* %str) { |
| 16 | ; CHECK: @test_simplify1 |
| 17 | %pat = getelementptr [1 x i8]* @null, i32 0, i32 0 |
| 18 | |
| 19 | %ret = call i64 @strspn(i8* %str, i8* %pat) |
| 20 | ret i64 %ret |
| 21 | ; CHECK-NEXT: ret i64 0 |
| 22 | } |
| 23 | |
| 24 | ; Check strspn("", s) -> 0. |
| 25 | |
| 26 | define i64 @test_simplify2(i8* %pat) { |
| 27 | ; CHECK: @test_simplify2 |
| 28 | %str = getelementptr [1 x i8]* @null, i32 0, i32 0 |
| 29 | |
| 30 | %ret = call i64 @strspn(i8* %str, i8* %pat) |
| 31 | ret i64 %ret |
| 32 | ; CHECK-NEXT: ret i64 0 |
| 33 | } |
| 34 | |
| 35 | ; Check strspn(s1, s2), where s1 and s2 are constants. |
| 36 | |
| 37 | define i64 @test_simplify3() { |
| 38 | ; CHECK: @test_simplify3 |
| 39 | %str = getelementptr [6 x i8]* @abcba, i32 0, i32 0 |
| 40 | %pat = getelementptr [4 x i8]* @abc, i32 0, i32 0 |
| 41 | |
| 42 | %ret = call i64 @strspn(i8* %str, i8* %pat) |
| 43 | ret i64 %ret |
| 44 | ; CHECK-NEXT: ret i64 5 |
| 45 | } |
| 46 | |
| 47 | ; Check cases that shouldn't be simplified. |
| 48 | |
| 49 | define i64 @test_no_simplify1(i8* %str, i8* %pat) { |
| 50 | ; CHECK: @test_no_simplify1 |
| 51 | |
| 52 | %ret = call i64 @strspn(i8* %str, i8* %pat) |
| 53 | ; CHECK-NEXT: %ret = call i64 @strspn(i8* %str, i8* %pat) |
| 54 | ret i64 %ret |
| 55 | ; CHECK-NEXT: ret i64 %ret |
| 56 | } |