Let's see if we can break things.
Lower GOT relative addresses to Lo and HI.
Update both ISels to select them when they can.
Saves instructions here and there.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25001 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Alpha/AlphaISelPattern.cpp b/lib/Target/Alpha/AlphaISelPattern.cpp
index 2ce18e1..80e18e7 100644
--- a/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -676,31 +676,26 @@
getValueInfo(dyn_cast<SrcValueSDNode>(N.getOperand(2))->getValue(),
i, j, k);
- GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(Address);
- if (GASD && !GASD->getGlobal()->isExternal()) {
- Tmp1 = MakeReg(MVT::i64);
- AlphaLowering.restoreGP(BB);
- BuildMI(BB, Alpha::LDAHr, 2, Tmp1)
- .addGlobalAddress(GASD->getGlobal()).addReg(Alpha::R29);
- if (EnableAlphaLSMark)
- BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
- .addImm(getUID());
- BuildMI(BB, GetRelVersion(Opc), 2, Result)
- .addGlobalAddress(GASD->getGlobal()).addReg(Tmp1);
- } else if (ConstantPoolSDNode *CP =
- dyn_cast<ConstantPoolSDNode>(Address)) {
- unsigned CPIdx = BB->getParent()->getConstantPool()->
- getConstantPoolIndex(CP->get());
- AlphaLowering.restoreGP(BB);
- has_sym = true;
- Tmp1 = MakeReg(MVT::i64);
- BuildMI(BB, Alpha::LDAHr, 2, Tmp1).addConstantPoolIndex(CPIdx)
- .addReg(Alpha::R29);
- if (EnableAlphaLSMark)
- BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
- .addImm(getUID());
- BuildMI(BB, GetRelVersion(Opc), 2, Result)
- .addConstantPoolIndex(CPIdx).addReg(Tmp1);
+ if (Address.getOpcode() == AlphaISD::GPRelLo) {
+ unsigned Hi = SelectExpr(Address.getOperand(1));
+ Address = Address.getOperand(0);
+ if (GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(Address)) {
+ if (EnableAlphaLSMark)
+ BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
+ .addImm(getUID());
+ BuildMI(BB, GetRelVersion(Opc), 2, Result)
+ .addGlobalAddress(GASD->getGlobal()).addReg(Hi);
+ } else if (ConstantPoolSDNode *CP =
+ dyn_cast<ConstantPoolSDNode>(Address)) {
+ unsigned CPIdx = BB->getParent()->getConstantPool()->
+ getConstantPoolIndex(CP->get());
+ has_sym = true;
+ if (EnableAlphaLSMark)
+ BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
+ .addImm(getUID());
+ BuildMI(BB, GetRelVersion(Opc), 2, Result)
+ .addConstantPoolIndex(CPIdx).addReg(Tmp1);
+ } else assert(0 && "Unknown Lo part");
} else if(Address.getOpcode() == ISD::FrameIndex) {
if (EnableAlphaLSMark)
BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
@@ -718,6 +713,36 @@
}
return Result;
}
+ case AlphaISD::GlobalBaseReg:
+ AlphaLowering.restoreGP(BB);
+ BuildMI(BB, Alpha::BIS, 2, Result).addReg(Alpha::R29).addReg(Alpha::R29);
+ return Result;
+ case AlphaISD::GPRelHi:
+ if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(N.getOperand(0)))
+ BuildMI(BB, Alpha::LDAHr, 2, Result)
+ .addConstantPoolIndex(BB->getParent()->getConstantPool()->
+ getConstantPoolIndex(CP->get()))
+ .addReg(SelectExpr(N.getOperand(1)));
+ else if (GlobalAddressSDNode *GASD =
+ dyn_cast<GlobalAddressSDNode>(N.getOperand(0)))
+ BuildMI(BB, Alpha::LDAHr, 2, Result)
+ .addGlobalAddress(GASD->getGlobal())
+ .addReg(SelectExpr(N.getOperand(1)));
+ else assert(0 && "unknown Hi part");
+ return Result;
+ case AlphaISD::GPRelLo:
+ if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(N.getOperand(0)))
+ BuildMI(BB, Alpha::LDAr, 2, Result)
+ .addConstantPoolIndex(BB->getParent()->getConstantPool()->
+ getConstantPoolIndex(CP->get()))
+ .addReg(SelectExpr(N.getOperand(1)));
+ else if (GlobalAddressSDNode *GASD =
+ dyn_cast<GlobalAddressSDNode>(N.getOperand(0)))
+ BuildMI(BB, Alpha::LDAr, 2, Result)
+ .addGlobalAddress(GASD->getGlobal())
+ .addReg(SelectExpr(N.getOperand(1)));
+ else assert(0 && "unknown Lo part");
+ return Result;
case ISD::GlobalAddress:
AlphaLowering.restoreGP(BB);
@@ -1699,17 +1724,16 @@
getValueInfo(cast<SrcValueSDNode>(N.getOperand(3))->getValue(),
i, j, k);
- GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(Address);
- if (GASD && !GASD->getGlobal()->isExternal()) {
- Tmp2 = MakeReg(MVT::i64);
- AlphaLowering.restoreGP(BB);
- BuildMI(BB, Alpha::LDAHr, 2, Tmp2)
- .addGlobalAddress(GASD->getGlobal()).addReg(Alpha::R29);
- if (EnableAlphaLSMark)
- BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
- .addImm(getUID());
- BuildMI(BB, GetRelVersion(Opc), 3).addReg(Tmp1)
- .addGlobalAddress(GASD->getGlobal()).addReg(Tmp2);
+ if (Address.getOpcode() == AlphaISD::GPRelLo) {
+ unsigned Hi = SelectExpr(Address.getOperand(1));
+ Address = Address.getOperand(0);
+ if (GlobalAddressSDNode *GASD = dyn_cast<GlobalAddressSDNode>(Address)) {
+ if (EnableAlphaLSMark)
+ BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)
+ .addImm(getUID());
+ BuildMI(BB, GetRelVersion(Opc), 3).addReg(Tmp1)
+ .addGlobalAddress(GASD->getGlobal()).addReg(Hi);
+ } else assert(0 && "Unknown Lo part");
} else if(Address.getOpcode() == ISD::FrameIndex) {
if (EnableAlphaLSMark)
BuildMI(BB, Alpha::MEMLABEL, 4).addImm(i).addImm(j).addImm(k)