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Handle an addrspacecast case in memcpyopt 

llvm-svn: 199836
This commit is contained in:
Matt Arsenault 2014-01-22 21:53:19 +00:00
parent a11863820c
commit 84de61148b
2 changed files with 18 additions and 1 deletions
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2
llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
View File

@ -662,7 +662,7 @@ bool MemCpyOpt::performCallSlotOptzn(Instruction *cpy,
while (!srcUseList.empty()) {
User *UI = srcUseList.pop_back_val();
if (isa<BitCastInst>(UI)) {
if (isa<BitCastInst>(UI) || isa<AddrSpaceCastInst>(UI)) {
for (User::use_iterator I = UI->use_begin(), E = UI->use_end();
I != E; ++I)
srcUseList.push_back(*I);

17
llvm/test/Transforms/MemCpyOpt/memcpy.ll
View File

@ -78,6 +78,7 @@ define void @test4(i8 *%P) {
declare void @test4a(i8* align 1 byval)
declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
declare void @llvm.memcpy.p1i8.p1i8.i64(i8 addrspace(1)* nocapture, i8 addrspace(1)* nocapture, i64, i32, i1) nounwind
%struct.S = type { i128, [4 x i8]}
@ -152,6 +153,22 @@ declare noalias i8* @malloc(i32)
; rdar://11341081
%struct.big = type { [50 x i32] }
define void @test9_addrspacecast() nounwind ssp uwtable {
entry:
; CHECK-LABEL: @test9_addrspacecast(
; CHECK: f1
; CHECK-NOT: memcpy
; CHECK: f2
%b = alloca %struct.big, align 4
%tmp = alloca %struct.big, align 4
call void @f1(%struct.big* sret %tmp)
%0 = addrspacecast %struct.big* %b to i8 addrspace(1)*
%1 = addrspacecast %struct.big* %tmp to i8 addrspace(1)*
call void @llvm.memcpy.p1i8.p1i8.i64(i8 addrspace(1)* %0, i8 addrspace(1)* %1, i64 200, i32 4, i1 false)
call void @f2(%struct.big* %b)
ret void
}
define void @test9() nounwind ssp uwtable {
entry:
; CHECK: test9