6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-13 20:32:21 +00:00
Code Issues Projects Releases Wiki Activity

Reduce the amount of LLVM Values for which we save reg. allocator

Browse Source 
state. Also, save the state for the incoming register of each phi
node.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13906 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2004-05-30 07:08:43 +00:00
parent a7afac29d0
commit 25d4b54f93
1 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
lib/Target/SparcV9/RegAlloc/PhyRegAlloc.cpp
View File

@ -28,6 +28,7 @@
#include "../LiveVar/FunctionLiveVarInfo.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/iPHINode.h"
#include "llvm/iOther.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
@ -1164,18 +1165,22 @@ void PhyRegAlloc::saveState () {
saveStateForValue (state, Arg, -1, ArgNum);
++ArgNum;
}
unsigned Insn = 0;
unsigned InstCount = 0;
// Instructions themselves encoded as operand # -1
for (const_inst_iterator II=inst_begin (Fn), IE=inst_end (Fn); II!=IE; ++II){
saveStateForValue (state, (&*II), Insn, -1);
for (unsigned i = 0; i < (*II).getNumOperands (); ++i) {
const Value *V = (*II).getOperand (i);
// Don't worry about it unless it's something whose reg. we'll need.
if (!isa<Argument> (V) && !isa<Instruction> (V))
continue;
saveStateForValue (state, V, Insn, i);
const Instruction *Inst = &*II;
saveStateForValue (state, Inst, InstCount, -1);
if (isa<PHINode> (Inst)) {
MachineCodeForInstruction &MCforPN = MachineCodeForInstruction::get(Inst);
// Last instr should be the copy...figure out what reg it is reading from
if (Value *PhiCpRes = MCforPN.back()->getOperand(0).getVRegValueOrNull()){
if (DEBUG_RA)
std::cerr << "Found Phi copy result: " << PhiCpRes->getName()
<< " in: " << *MCforPN.back() << "\n";
saveStateForValue (state, PhiCpRes, InstCount, -2);
}
++Insn;
}
++InstCount;
}
}