6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-11-03 14:21:30 +00:00
Code Issues Projects Releases Wiki Activity

Added more comments

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1498 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ruchira Sasanka
2002-01-07 21:03:42 +00:00
parent 690f367f6b
commit bf915524a1
2 changed files with 29 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
lib/Target/SparcV9/SparcV9RegInfo.cpp
View File

@@ -1161,31 +1161,28 @@ MachineInstr * UltraSparcRegInfo::cpValue2Value(Value *Src, Value *Dest) const{
//----------------------------------------------------------------------------
// This method inserts caller saving/restoring instructons before/after
// a call machine instruction.
// a call machine instruction. The caller saving/restoring instructions are
// inserted like:
//
// ** caller saving instructions
// other instructions inserted for the call by ColorCallArg
// CALL instruction
// other instructions inserted for the call ColorCallArg
// ** caller restoring instructions
//
//----------------------------------------------------------------------------
void UltraSparcRegInfo::insertCallerSavingCode(const MachineInstr *MInst,
const BasicBlock *BB,
PhyRegAlloc &PRA) const {
// assert( (getInstrInfo()).isCall( MInst->getOpCode() ) );
// Clear the temp area of the stack
//PRA.mcInfo.popAllTempValues(target);
// TODO*** Don't do this since we can have a situation like
/*
stx %o1 %i6 1999 <--- inserted by this code
stx %o5 %i6 2007
*****
stx %o1 %i6 2007 ???? <-- inserted by statck2stack call arg
*/
// has set to record which registers were saved/restored
//
hash_set<unsigned> PushedRegSet;
// Now find the LR of the return value of the call
// The last *implicit operand* is the return value of a call
// Insert it to to he PushedRegSet since we must not save that register
@@ -1350,11 +1347,6 @@ void UltraSparcRegInfo::insertCallerSavingCode(const MachineInstr *MInst,
} // for each value in the LV set after instruction
// Clear the temp area of the stack
// PRA.mcInfo.popAllTempValues(target);
// TODO *** see above call - optimize later
}
//---------------------------------------------------------------------------