| ; Test that the strcat libcall simplifier works correctly. |
| ; |
| ; RUN: opt < %s -passes=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 [6 x i8] c"hello\00" |
| @empty = constant [1 x i8] c"\00" |
| @a = common global [32 x i8] zeroinitializer, align 1 |
| |
| declare ptr @strcat(ptr, ptr) |
| |
| define void @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NOT: call ptr @strcat |
| ; CHECK: ret void |
| |
| call ptr @strcat(ptr @a, ptr @hello) |
| ret void |
| } |
| |
| define void @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: ret void |
| |
| call ptr @strcat(ptr @a, ptr @empty) |
| ret void |
| } |
