RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-31 20:51:52 +01:00
Code Issues Projects Releases Wiki Activity

[PowerPC] Make AddrSpaceCast noop

Browse Source 
PowerPC targets do not use address spaces. As a result, we can get selection
failures with address space casts. This patch makes those casts noops.

Patch by Valentin Churavy.

Differential revision: https://reviews.llvm.org/D43781

llvm-svn: 327877
This commit is contained in:
Nemanja Ivanovic 2018-03-19 18:50:02 +00:00
parent 58094170aa
commit 3ba3c2e680
2 changed files with 27 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Target/PowerPC/PPCISelLowering.h
View File

@ -884,6 +884,11 @@ namespace llvm {
}
};
bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
// Addrspacecasts are always noops.
return true;
}
bool canReuseLoadAddress(SDValue Op, EVT MemVT, ReuseLoadInfo &RLI,
SelectionDAG &DAG,
ISD::LoadExtType ET = ISD::NON_EXTLOAD) const;

22
test/CodeGen/PowerPC/addrspacecast.ll Normal file
View File

@ -0,0 +1,22 @@
; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu %s -o - | FileCheck %s
; Check that codegen for an addrspace cast succeeds without error.
define <4 x i32 addrspace(1)*> @f (<4 x i32*> %x) {
%1 = addrspacecast <4 x i32*> %x to <4 x i32 addrspace(1)*>
ret <4 x i32 addrspace(1)*> %1
; CHECK-LABEL: @f
}
; Check that fairly complicated addrspace cast and operations succeed without error.
%struct = type opaque
define void @g (%struct addrspace(10)** %x) {
%1 = load %struct addrspace(10)*, %struct addrspace(10)** %x
%2 = addrspacecast %struct addrspace(10)* %1 to %struct addrspace(11)*
%3 = bitcast %struct addrspace(11)* %2 to i8 addrspace(11)*
%4 = getelementptr i8, i8 addrspace(11)* %3, i64 16
%5 = bitcast i8 addrspace(11)* %4 to %struct addrspace(10)* addrspace(11)*
%6 = load %struct addrspace(10)*, %struct addrspace(10)* addrspace(11)* %5
store %struct addrspace(10)* %6, %struct addrspace(10)** undef
ret void
; CHECK-LABEL: @g
}