[llvm] 23f144e - [NFC] Add extra documentation for GetSymbolFromOperand() in PPCMCInstLower.cpp

[Amy Kwan via llvm-commits]

Author: Amy Kwan
Date: 2023-09-07T21:01:28-05:00
New Revision: 23f144ec1c014fb26a98cff407d2d83b50f11baf

URL: https://github.com/llvm/llvm-project/commit/23f144ec1c014fb26a98cff407d2d83b50f11baf
DIFF: https://github.com/llvm/llvm-project/commit/23f144ec1c014fb26a98cff407d2d83b50f11baf.diff

LOG: [NFC] Add extra documentation for GetSymbolFromOperand() in PPCMCInstLower.cpp

Add a missing comment from D155600, where we note that we get the symbol
from a global, due to XCOFF-specific intricacies.

Added: 
    

Modified: 
    llvm/lib/Target/PowerPC/PPCMCInstLower.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp b/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
index ba5465f8bb6edcd..c9797fdc22863df 100644
--- a/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
+++ b/llvm/lib/Target/PowerPC/PPCMCInstLower.cpp
@@ -32,6 +32,8 @@ using namespace llvm;
 static MCSymbol *GetSymbolFromOperand(const MachineOperand &MO,
                                       AsmPrinter &AP) {
   if (MO.isGlobal()) {
+    // Get the symbol from the global, accounting for XCOFF-specific
+    // intricacies (see TargetLoweringObjectFileXCOFF::getTargetSymbol).
     const GlobalValue *GV = MO.getGlobal();
     return AP.getSymbol(GV);
   }