| Nick Lewycky | 703e488 | 2014-07-14 18:52:02 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -memcpyopt -S | FileCheck %s |
| 2 | |
| 3 | target datalayout = "e" |
| 4 | |
| 5 | declare void @foo(i8*) |
| 6 | declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind |
| 7 | |
| 8 | define void @test() { |
| 9 | %ptr1 = alloca i8 |
| 10 | %ptr2 = alloca i8 |
| 11 | call void @foo(i8* %ptr2) |
| 12 | call void @llvm.memcpy.p0i8.p0i8.i32(i8* %ptr1, i8* %ptr2, i32 1, i32 1, i1 false) |
| 13 | call void @foo(i8* %ptr1) |
| 14 | ret void |
| 15 | |
| 16 | ; Check that the transformation isn't applied if the called function can |
| 17 | ; capture the pointer argument (i.e. the nocapture attribute isn't present) |
| 18 | ; CHECK-LABEL: @test( |
| 19 | ; CHECK: call void @foo(i8* %ptr2) |
| 20 | ; CHECK-NEXT: call void @llvm.memcpy |
| 21 | ; CHECK-NEXT: call void @foo(i8* %ptr1) |
| 22 | } |