1 ; MemCpy optimizations should take place even in presence of invariant.start
2 ; RUN: opt < %s -basicaa -memcpyopt -dse -S | FileCheck %s
4 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"
6 target triple = "i686-apple-darwin9"
8 %0 = type { x86_fp80, x86_fp80 }
9 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i1) nounwind
10 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture readonly, i64, i1)
11 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
13 declare {}* @llvm.invariant.start.p0i8(i64, i8* nocapture) nounwind readonly
15 ; FIXME: The invariant.start does not modify %P.
16 ; The intermediate alloca and one of the memcpy's should be eliminated, the
17 ; other should be transformed to a memmove.
18 define void @test1(i8* %P, i8* %Q) nounwind {
19 %memtmp = alloca %0, align 16
20 %R = bitcast %0* %memtmp to i8*
21 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 16 %R, i8* align 16 %P, i32 32, i1 false)
22 %i = call {}* @llvm.invariant.start.p0i8(i64 32, i8* %P)
23 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 16 %Q, i8* align 16 %R, i32 32, i1 false)
25 ; CHECK-LABEL: @test1(
26 ; CHECK-NEXT: %memtmp = alloca %0, align 16
27 ; CHECK-NEXT: %R = bitcast %0* %memtmp to i8*
28 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 16 %R, i8* align 16 %P, i32 32, i1 false)
29 ; CHECK-NEXT: %i = call {}* @llvm.invariant.start.p0i8(i64 32, i8* %P)
30 ; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 16 %Q, i8* align 16 %R, i32 32, i1 false)
31 ; CHECK-NEXT: ret void
35 ; The invariant.start intrinsic does not inhibit tranforming the memcpy to a
37 define void @test2(i8* %dst1, i8* %dst2, i8 %c) {
38 ; CHECK-LABEL: define void @test2(
39 ; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* %dst1, i8 %c, i64 128, i1 false)
40 ; CHECK-NEXT: %i = call {}* @llvm.invariant.start.p0i8(i64 32, i8* %dst1)
41 ; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 %dst2, i8 %c, i64 128, i1 false)
42 ; CHECK-NEXT: ret void
43 call void @llvm.memset.p0i8.i64(i8* %dst1, i8 %c, i64 128, i1 false)
44 %i = call {}* @llvm.invariant.start.p0i8(i64 32, i8* %dst1)
45 call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %dst2, i8* align 8 %dst1, i64 128, i1 false)