if (GVar->isThreadLocal())
return false;
- // Set up the basic address.
+ // Okay, we've committed to selecting this global. Set up the basic address.
AM.GV = GV;
if (!isCall &&
!Subtarget->is64Bit())
AM.Base.Reg = getInstrInfo()->getGlobalBaseReg(&MF);
- // Emit an extra load if the ABI requires it.
- if (Subtarget->GVRequiresExtraLoad(GV, TM, isCall)) {
- // Check to see if we've already materialized this
- // value in a register in this block.
- DenseMap<const Value *, unsigned>::iterator I = LocalValueMap.find(V);
- if (I != LocalValueMap.end() && I->second != 0) {
- AM.Base.Reg = I->second;
- AM.GV = 0;
- return true;
+ // If the ABI doesn't require an extra load, return a direct reference to
+ // the global.
+ if (!Subtarget->GVRequiresExtraLoad(GV, TM, isCall)) {
+ if (Subtarget->isPICStyleRIPRel()) {
+ // Use rip-relative addressing if we can. Above we verified that the
+ // base and index registers are unused.
+ assert(AM.Base.Reg == 0 && AM.IndexReg == 0);
+ AM.Base.Reg = X86::RIP;
}
+ return true;
+ }
+
+ // Check to see if we've already materialized this stub loaded value into a
+ // register in this block. If so, just reuse it.
+ DenseMap<const Value*, unsigned>::iterator I = LocalValueMap.find(V);
+ unsigned LoadReg;
+ if (I != LocalValueMap.end() && I->second != 0) {
+ LoadReg = I->second;
+ } else {
// Issue load from stub.
unsigned Opc = 0;
const TargetRegisterClass *RC = NULL;
StubAM.Base.Reg = X86::RIP;
}
}
-
- unsigned ResultReg = createResultReg(RC);
- addFullAddress(BuildMI(MBB, DL, TII.get(Opc), ResultReg), StubAM);
-
- // Now construct the final address. Note that the Disp, Scale,
- // and Index values may already be set here.
- AM.Base.Reg = ResultReg;
- AM.GV = 0;
-
+
+ LoadReg = createResultReg(RC);
+ addFullAddress(BuildMI(MBB, DL, TII.get(Opc), LoadReg), StubAM);
+
// Prevent loading GV stub multiple times in same MBB.
- LocalValueMap[V] = AM.Base.Reg;
- } else if (Subtarget->isPICStyleRIPRel()) {
- // Use rip-relative addressing if we can.
- AM.Base.Reg = X86::RIP;
+ LocalValueMap[V] = LoadReg;
}
+ // Now construct the final address. Note that the Disp, Scale,
+ // and Index values may already be set here.
+ AM.Base.Reg = LoadReg;
+ AM.GV = 0;
return true;
}