handle the upper16/lower16 target operand flags on symbol references for MC
instruction lowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114191 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMMCInstLower.cpp b/lib/Target/ARM/ARMMCInstLower.cpp
index 404a73b..03c3825 100644
--- a/lib/Target/ARM/ARMMCInstLower.cpp
+++ b/lib/Target/ARM/ARMMCInstLower.cpp
@@ -40,20 +40,39 @@
}
#endif
-MCSymbol *ARMMCInstLower::
-GetGlobalAddressSymbol(const MachineOperand &MO) const {
+MCSymbol *ARMMCInstLower::GetGlobalAddressSymbol(const GlobalValue *GV) const {
+ return Printer.Mang->getSymbol(GV);
+}
+
+const MCSymbolRefExpr *ARMMCInstLower::
+GetSymbolRef(const MachineOperand &MO) const {
+ assert(MO.isGlobal() && "Isn't a global address reference?");
// FIXME: HANDLE PLT references how??
+
+ const MCSymbolRefExpr *SymRef;
+ const MCSymbol *Symbol = GetGlobalAddressSymbol(MO.getGlobal());
+
switch (MO.getTargetFlags()) {
default: assert(0 && "Unknown target flag on GV operand");
- case 0: break;
+ case 0:
+ SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, Ctx);
+ break;
+ case ARMII::MO_LO16:
+ SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_LO16, Ctx);
+ break;
+ case ARMII::MO_HI16:
+ SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_HI16, Ctx);
+ break;
}
- return Printer.Mang->getSymbol(MO.getGlobal());
+ return SymRef;
}
MCSymbol *ARMMCInstLower::
GetExternalSymbolSymbol(const MachineOperand &MO) const {
// FIXME: HANDLE PLT references how??
+ // FIXME: This probably needs to be merged with the above SymbolRef stuff
+ // to handle :lower16: and :upper16: (?)
switch (MO.getTargetFlags()) {
default: assert(0 && "Unknown target flag on GV operand");
case 0: break;
@@ -115,6 +134,17 @@
return MCOperand::CreateExpr(Expr);
}
+MCOperand ARMMCInstLower::
+LowerSymbolRefOperand(const MachineOperand &MO,
+ const MCSymbolRefExpr *Sym) const {
+ const MCExpr *Expr = Sym;
+ if (!MO.isJTI() && MO.getOffset())
+ Expr = MCBinaryExpr::CreateAdd(Expr,
+ MCConstantExpr::Create(MO.getOffset(), Ctx),
+ Ctx);
+ return MCOperand::CreateExpr(Expr);
+}
+
void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
OutMI.setOpcode(MI->getOpcode());
@@ -141,7 +171,7 @@
MO.getMBB()->getSymbol(), Ctx));
break;
case MachineOperand::MO_GlobalAddress:
- MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
+ MCOp = LowerSymbolRefOperand(MO, GetSymbolRef(MO));
break;
case MachineOperand::MO_ExternalSymbol:
MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));