1; Test that the strcat libcall simplifier works correctly. 2; 3; RUN: opt < %s -instcombine -S | FileCheck %s 4 5target 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@hello = constant [6 x i8] c"hello\00" 8@empty = constant [1 x i8] c"\00" 9@a = common global [32 x i8] zeroinitializer, align 1 10 11declare i8* @strcat(i8*, i8*) 12 13define void @test_simplify1() { 14; CHECK-LABEL: @test_simplify1( 15; CHECK-NOT: call i8* @strcat 16; CHECK: ret void 17 18 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 19 %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0 20 call i8* @strcat(i8* %dst, i8* %src) 21 ret void 22} 23 24define void @test_simplify2() { 25; CHECK-LABEL: @test_simplify2( 26; CHECK-NEXT: ret void 27 28 %dst = getelementptr [32 x i8], [32 x i8]* @a, i32 0, i32 0 29 %src = getelementptr [1 x i8], [1 x i8]* @empty, i32 0, i32 0 30 call i8* @strcat(i8* %dst, i8* %src) 31 ret void 32} 33