xref: /llvm-project/llvm/test/Transforms/MemCpyOpt/variable-sized-memset-memcpy.ll (revision a11faeed446882a81e79d780125d93e7199df645) 
1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s
3target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
4
5define void @test(ptr %src, i8 %c, i64 %size) {
6; CHECK-LABEL: @test(
7; CHECK-NEXT:    [[DST1:%.*]] = alloca i8, i64 [[SIZE:%.*]], align 1
8; CHECK-NEXT:    [[DST2:%.*]] = alloca i8, i64 [[SIZE]], align 1
9; CHECK-NEXT:    call void @llvm.memset.p0.i64(ptr align 8 [[DST1]], i8 [[C:%.*]], i64 [[SIZE]], i1 false)
10; CHECK-NEXT:    call void @llvm.memset.p0.i64(ptr align 8 [[DST2]], i8 [[C]], i64 [[SIZE]], i1 false)
11; CHECK-NEXT:    ret void
12;
13  %dst1 = alloca i8, i64 %size
14  %dst2 = alloca i8, i64 %size
15  call void @llvm.memset.p0.i64(ptr align 8 %dst1, i8 %c, i64 %size, i1 false)
16  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst2, ptr align 8 %dst1, i64 %size, i1 false)
17
18  ret void
19}
20
21; Differing sizes, so left as it is.
22define void @negative_test(ptr %src, i8 %c, i64 %size1, i64 %size2) {
23; CHECK-LABEL: @negative_test(
24; CHECK-NEXT:    [[DST1:%.*]] = alloca i8, i64 [[SIZE1:%.*]], align 1
25; CHECK-NEXT:    [[DST2:%.*]] = alloca i8, i64 [[SIZE2:%.*]], align 1
26; CHECK-NEXT:    call void @llvm.memset.p0.i64(ptr align 8 [[DST1]], i8 [[C:%.*]], i64 [[SIZE1]], i1 false)
27; CHECK-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[DST2]], ptr align 8 [[DST1]], i64 [[SIZE2]], i1 false)
28; CHECK-NEXT:    ret void
29;
30  %dst1 = alloca i8, i64 %size1
31  %dst2 = alloca i8, i64 %size2
32  call void @llvm.memset.p0.i64(ptr align 8 %dst1, i8 %c, i64 %size1, i1 false)
33  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dst2, ptr align 8 %dst1, i64 %size2, i1 false)
34
35  ret void
36}
37
38declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)
39declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)
40