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Change StackSlotForVirtReg (which maps vregs to frame indices) from std::map to IndexedMap.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53414 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-07-10 18:23:23 +00:00
parent 6291d69c4c
commit bdb10fe0f6
1 changed files with 8 additions and 8 deletions
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16
lib/CodeGen/RegAllocLocal.cpp
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@ -31,7 +31,6 @@
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h"
#include <algorithm>
#include <map>
using namespace llvm;
STATISTIC(NumStores, "Number of stores added");
@ -45,7 +44,8 @@ namespace {
class VISIBILITY_HIDDEN RALocal : public MachineFunctionPass {
public:
static char ID;
RALocal() : MachineFunctionPass((intptr_t)&ID) {}
RALocal() : MachineFunctionPass((intptr_t)&ID),
StackSlotForVirtReg(-1) {}
private:
const TargetMachine *TM;
MachineFunction *MF;
@ -54,7 +54,7 @@ namespace {
// StackSlotForVirtReg - Maps virtual regs to the frame index where these
// values are spilled.
std::map<unsigned, int> StackSlotForVirtReg;
IndexedMap<int, VirtReg2IndexFunctor> StackSlotForVirtReg;
// Virt2PhysRegMap - This map contains entries for each virtual register
// that is currently available in a physical register.
@ -254,17 +254,16 @@ namespace {
/// to be held on the stack.
int RALocal::getStackSpaceFor(unsigned VirtReg, const TargetRegisterClass *RC) {
// Find the location Reg would belong...
std::map<unsigned, int>::iterator I = StackSlotForVirtReg.find(VirtReg);
if (I != StackSlotForVirtReg.end())
return I->second; // Already has space allocated?
int SS = StackSlotForVirtReg[VirtReg];
if (SS != -1)
return SS; // Already has space allocated?
// Allocate a new stack object for this spill location...
int FrameIdx = MF->getFrameInfo()->CreateStackObject(RC->getSize(),
RC->getAlignment());
// Assign the slot...
StackSlotForVirtReg.insert(I, std::make_pair(VirtReg, FrameIdx));
StackSlotForVirtReg[VirtReg] = FrameIdx;
return FrameIdx;
}
@ -961,6 +960,7 @@ bool RALocal::runOnMachineFunction(MachineFunction &Fn) {
// initialize the virtual->physical register map to have a 'null'
// mapping for all virtual registers
unsigned LastVirtReg = MF->getRegInfo().getLastVirtReg();
StackSlotForVirtReg.grow(LastVirtReg);
Virt2PhysRegMap.grow(LastVirtReg);
Virt2LastUseMap.grow(LastVirtReg);
VirtRegModified.resize(LastVirtReg+1-TargetRegisterInfo::FirstVirtualRegister);