| Meador Inge | 40b6fac | 2012-10-15 03:47:37 +0000 | [diff] [blame] | 1 | ; Test that the strncmp library call simplifier works correctly. |
| 2 | ; RUN: opt < %s -instcombine -S | FileCheck %s |
| 3 | |
| 4 | 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" |
| 5 | |
| 6 | @hello = constant [6 x i8] c"hello\00" |
| 7 | @hell = constant [5 x i8] c"hell\00" |
| 8 | |
| 9 | declare i16 @strncmp(i8*, i8*, i32) |
| 10 | |
| 11 | define i16 @test_nosimplify() { |
| Stephen Lin | c1c7a13 | 2013-07-14 01:42:54 +0000 | [diff] [blame] | 12 | ; CHECK-LABEL: @test_nosimplify( |
| Meador Inge | 40b6fac | 2012-10-15 03:47:37 +0000 | [diff] [blame] | 13 | ; CHECK: call i16 @strncmp |
| 14 | ; CHECK: ret i16 %temp1 |
| 15 | |
| David Blaikie | 79e6c74 | 2015-02-27 19:29:02 +0000 | [diff] [blame] | 16 | %str1 = getelementptr inbounds [5 x i8], [5 x i8]* @hell, i32 0, i32 0 |
| 17 | %str2 = getelementptr inbounds [6 x i8], [6 x i8]* @hello, i32 0, i32 0 |
| Meador Inge | 40b6fac | 2012-10-15 03:47:37 +0000 | [diff] [blame] | 18 | %temp1 = call i16 @strncmp(i8* %str1, i8* %str2, i32 10) |
| 19 | ret i16 %temp1 |
| 20 | } |