1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; Test that the memcpy library call simplifier works correctly.
3;
4; RUN: opt < %s -instcombine -S | FileCheck %s
5
6target 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
8declare i8* @memcpy(i8*, i8*, i32)
9
10; Check memcpy(mem1, mem2, size) -> llvm.memcpy(mem1, mem2, size, 1).
11
12define i8* @test_simplify1(i8* %mem1, i8* %mem2, i32 %size) {
13; CHECK-LABEL: @test_simplify1(
14; CHECK-NEXT:    call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 [[MEM1:%.*]], i8* align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false)
15; CHECK-NEXT:    ret i8* [[MEM1]]
16;
17  %ret = call i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size)
18  ret i8* %ret
19}
20
21; Verify that the strictfp attr doesn't block this optimization.
22
23define i8* @test_simplify2(i8* %mem1, i8* %mem2, i32 %size) strictfp {
24; CHECK-LABEL: @test_simplify2(
25; CHECK-NEXT:    call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 [[MEM1:%.*]], i8* align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false)
26; CHECK-NEXT:    ret i8* [[MEM1]]
27;
28  %ret = call i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size) strictfp
29  ret i8* %ret
30}
31