[PATCH] D157547: Arm64EC entry/exit thunks, consolidated.

[Daniel Paoliello via Phabricator via cfe-commits]

dpaoliello added inline comments.


================
Comment at: llvm/lib/Target/AArch64/AArch64MCInstLower.cpp:37-38
 
 MCSymbol *
 AArch64MCInstLower::GetGlobalAddressSymbol(const MachineOperand &MO) const {
   const GlobalValue *GV = MO.getGlobal();
----------------
We now also need to call this for constants in case the function is only referenced from a variable (e.g., a VTable) and is never called elsewhere.

I split this function into a new function `GetGlobalValueSymbol`:

```
MCSymbol *
AArch64MCInstLower::GetGlobalAddressSymbol(const MachineOperand &MO) const {
  return GetGlobalValueSymbol(MO.getGlobal(), MO.getTargetFlags());
}

MCSymbol *
AArch64MCInstLower::GetGlobalValueSymbol(const GlobalValue *GV, unsigned TargetFlags) const { ... }
```

And then called it from `AArch64AsmPrinter`:

```
const MCExpr *AArch64AsmPrinter::lowerConstant(const Constant *CV) {
  if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
    return MCSymbolRefExpr::create(MCInstLowering.GetGlobalValueSymbol(GV, 0), OutContext);

  return AsmPrinter::lowerConstant(CV);
}
```


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D157547