[PATCH] D43781: Make AddrSpaceCast noops on PPC
Nemanja Ivanovic via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Mar 19 11:54:16 PDT 2018
This revision was automatically updated to reflect the committed changes.
Closed by commit rL327877: [PowerPC] Make AddrSpaceCast noop (authored by nemanjai, committed by ).
Repository:
rL LLVM
https://reviews.llvm.org/D43781
Files:
llvm/trunk/lib/Target/PowerPC/PPCISelLowering.h
llvm/trunk/test/CodeGen/PowerPC/addrspacecast.ll
Index: llvm/trunk/test/CodeGen/PowerPC/addrspacecast.ll
===================================================================
--- llvm/trunk/test/CodeGen/PowerPC/addrspacecast.ll
+++ llvm/trunk/test/CodeGen/PowerPC/addrspacecast.ll
@@ -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
+}
Index: llvm/trunk/lib/Target/PowerPC/PPCISelLowering.h
===================================================================
--- llvm/trunk/lib/Target/PowerPC/PPCISelLowering.h
+++ llvm/trunk/lib/Target/PowerPC/PPCISelLowering.h
@@ -884,6 +884,11 @@
}
};
+ 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;
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