1 ; Test that the strcpy library call simplifier works correctly. 2 ; rdar://6839935 3 ; RUN: opt < %s -instcombine -S | FileCheck %s 4 ; 5 ; This transformation requires the pointer size, as it assumes that size_t is 6 ; the size of a pointer. 7 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-n8:16:32" 8 9 @hello = constant [6 x i8] c"hello\00" 10 @a = common global [32 x i8] zeroinitializer, align 1 11 @b = common global [32 x i8] zeroinitializer, align 1 12 13 declare i8* @strcpy(i8*, i8*) 14 15 define void @test_simplify1() { 16 ; CHECK-LABEL: @test_simplify1( 17 18 %dst = getelementptr [32 x i8]* @a, i32 0, i32 0 19 %src = getelementptr [6 x i8]* @hello, i32 0, i32 0 20 21 call i8* @strcpy(i8* %dst, i8* %src) 22 ; CHECK: @llvm.memcpy.p0i8.p0i8.i32 23 ret void 24 } 25 26 define i8* @test_simplify2() { 27 ; CHECK-LABEL: @test_simplify2( 28 29 %dst = getelementptr [32 x i8]* @a, i32 0, i32 0 30 31 %ret = call i8* @strcpy(i8* %dst, i8* %dst) 32 ; CHECK: ret i8* getelementptr inbounds ([32 x i8]* @a, i32 0, i32 0) 33 ret i8* %ret 34 } 35 36 define i8* @test_no_simplify1() { 37 ; CHECK-LABEL: @test_no_simplify1( 38 39 %dst = getelementptr [32 x i8]* @a, i32 0, i32 0 40 %src = getelementptr [32 x i8]* @b, i32 0, i32 0 41 42 %ret = call i8* @strcpy(i8* %dst, i8* %src) 43 ; CHECK: call i8* @strcpy 44 ret i8* %ret 45 } 46
