[NFC] [PowerPC] add an routine in PPCTargetLowering to determine if a global is accessed as got-indirect or not.
In theory, we should let the PPC target to determine how to lower the TOC Entry for globals.
And the PPCTargetLowering requires this query to do some optimization for TOC_Entry.
Differential Revision: https://reviews.llvm.org/D54925
llvm-svn: 348108
diff --git a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index 8af9680..7d9ea93 100644
--- a/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -4897,9 +4897,9 @@
SDValue TOCbase = N->getOperand(1);
SDNode *Tmp = CurDAG->getMachineNode(PPC::ADDIStocHA, dl, MVT::i64,
TOCbase, GA);
-
- if (isa<JumpTableSDNode>(GA) || isa<BlockAddressSDNode>(GA) ||
- CModel == CodeModel::Large) {
+ if (PPCLowering->isAccessedAsGotIndirect(GA)) {
+ // If it is access as got-indirect, we need an extra LD to load
+ // the address.
SDNode *MN = CurDAG->getMachineNode(PPC::LDtocL, dl, MVT::i64, GA,
SDValue(Tmp, 0));
transferMemOperands(N, MN);
@@ -4907,18 +4907,7 @@
return;
}
- if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(GA)) {
- const GlobalValue *GV = G->getGlobal();
- unsigned char GVFlags = PPCSubTarget->classifyGlobalReference(GV);
- if (GVFlags & PPCII::MO_NLP_FLAG) {
- SDNode *MN = CurDAG->getMachineNode(PPC::LDtocL, dl, MVT::i64, GA,
- SDValue(Tmp, 0));
- transferMemOperands(N, MN);
- ReplaceNode(N, MN);
- return;
- }
- }
-
+ // Build the address relative to the TOC-pointer..
ReplaceNode(N, CurDAG->getMachineNode(PPC::ADDItocL, dl, MVT::i64,
SDValue(Tmp, 0), GA));
return;