1 ; Test that the memcpy library call simplifier works correctly.
3 ; RUN: opt < %s -instcombine -S | FileCheck %s
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"
7 declare i8* @memcpy(i8*, i8*, i32)
9 ; Check memcpy(mem1, mem2, size) -> llvm.memcpy(mem1, mem2, size, 1).
11 define i8* @test_simplify1(i8* %mem1, i8* %mem2, i32 %size) {
12 ; CHECK-LABEL: @test_simplify1(
13 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %mem1, i8* align 1 %mem2, i32 %size, i1 false)
14 ; CHECK-NEXT: ret i8* %mem1
16 %ret = call i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size)
20 ; Verify that the strictfp attr doesn't block this optimization.
22 define i8* @test_simplify2(i8* %mem1, i8* %mem2, i32 %size) {
23 ; CHECK-LABEL: @test_simplify2(
24 %ret = call i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size) strictfp
25 ; CHECK: call void @llvm.memcpy
27 ; CHECK: ret i8* %mem1