| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test that the memcpy library call simplifier works correctly. |
| ; |
| ; RUN: opt < %s -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" |
| |
| declare i8* @memcpy(i8*, i8*, i32) |
| |
| ; Check memcpy(mem1, mem2, size) -> llvm.memcpy(mem1, mem2, size, 1). |
| |
| define i8* @test_simplify1(i8* %mem1, i8* %mem2, i32 %size) { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 [[MEM1:%.*]], i8* align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false) |
| ; CHECK-NEXT: ret i8* [[MEM1]] |
| ; |
| %ret = call i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size) |
| ret i8* %ret |
| } |
| |
| ; Verify that the strictfp attr doesn't block this optimization. |
| |
| define i8* @test_simplify2(i8* %mem1, i8* %mem2, i32 %size) strictfp { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 [[MEM1:%.*]], i8* align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false) |
| ; CHECK-NEXT: ret i8* [[MEM1]] |
| ; |
| %ret = call i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size) strictfp |
| ret i8* %ret |
| } |
| |
| define i8* @test_no_incompatible_attr(i8* %mem1, i8* %mem2, i32 %size) { |
| ; CHECK-LABEL: @test_no_incompatible_attr( |
| ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 [[MEM1:%.*]], i8* align 1 [[MEM2:%.*]], i32 [[SIZE:%.*]], i1 false) |
| ; CHECK-NEXT: ret i8* [[MEM1]] |
| |
| %ret = call dereferenceable(1) i8* @memcpy(i8* %mem1, i8* %mem2, i32 %size) |
| ret i8* %ret |
| } |