| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -memcpyopt -S | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| 4 | target triple = "x86_64-apple-macosx10.8.0" |
| 5 | |
| 6 | %struct.foo = type { i8, [7 x i8], i32 } |
| 7 | |
| 8 | define i32 @test1(%struct.foo* nocapture %foobie) nounwind noinline ssp uwtable { |
| 9 | %bletch.sroa.1 = alloca [7 x i8], align 1 |
| 10 | %1 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 0 |
| 11 | store i8 98, i8* %1, align 4 |
| 12 | %2 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 1, i64 0 |
| 13 | %3 = getelementptr inbounds [7 x i8], [7 x i8]* %bletch.sroa.1, i64 0, i64 0 |
| 14 | call void @llvm.memcpy.p0i8.p0i8.i64(i8* %2, i8* %3, i64 7, i1 false) |
| 15 | %4 = getelementptr inbounds %struct.foo, %struct.foo* %foobie, i64 0, i32 2 |
| 16 | store i32 20, i32* %4, align 4 |
| 17 | ret i32 undef |
| 18 | |
| 19 | ; Check that the memcpy is removed. |
| 20 | ; CHECK-LABEL: @test1( |
| 21 | ; CHECK-NOT: call void @llvm.memcpy |
| 22 | } |
| 23 | |
| 24 | define void @test2(i8* sret noalias nocapture %out, i8* %in) nounwind noinline ssp uwtable { |
| 25 | call void @llvm.lifetime.start.p0i8(i64 8, i8* %in) |
| 26 | call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 8, i1 false) |
| 27 | ret void |
| 28 | |
| 29 | ; Check that the memcpy is removed. |
| 30 | ; CHECK-LABEL: @test2( |
| 31 | ; CHECK-NOT: call void @llvm.memcpy |
| 32 | } |
| 33 | |
| 34 | define void @test3(i8* sret noalias nocapture %out, i8* %in) nounwind noinline ssp uwtable { |
| 35 | call void @llvm.lifetime.start.p0i8(i64 4, i8* %in) |
| 36 | call void @llvm.memcpy.p0i8.p0i8.i64(i8* %out, i8* %in, i64 8, i1 false) |
| 37 | ret void |
| 38 | |
| 39 | ; Check that the memcpy is not removed. |
| 40 | ; CHECK-LABEL: @test3( |
| 41 | ; CHECK: call void @llvm.memcpy |
| 42 | } |
| 43 | |
| 44 | declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind |
| 45 | |
| 46 | declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind |