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Improve debugging output and clean up some code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10288 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alkis Evlogimenos 2003-12-04 03:57:28 +00:00
parent d866473094
commit 69546d5f84
1 changed files with 14 additions and 17 deletions
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31
lib/CodeGen/RegAllocLinearScan.cpp
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@ -150,10 +150,9 @@ namespace {
/// stack slot /// stack slot
void assignVirt2StackSlot(unsigned virtReg); void assignVirt2StackSlot(unsigned virtReg);
/// findOrCreateStackSlot - returns the offset of the /// getStackSlot - returns the offset of the specified
/// specified register on the stack allocating space if /// register on the stack
/// necessary int getStackSlot(unsigned virtReg);
int findOrCreateStackSlot(unsigned virtReg);
/// spillVirtReg - spills the virtual register /// spillVirtReg - spills the virtual register
void spillVirtReg(unsigned virtReg); void spillVirtReg(unsigned virtReg);
@ -749,29 +748,27 @@ void RA::assignVirt2StackSlot(unsigned virtReg)
if (v2pMap_.find(virtReg) != v2pMap_.end()) { if (v2pMap_.find(virtReg) != v2pMap_.end()) {
clearVirtReg(virtReg); clearVirtReg(virtReg);
} }
else {
v2pMap_[virtReg] = 0; // this marks that this virtual register
// lives on the stack
}
} }
int RA::findOrCreateStackSlot(unsigned virtReg) int RA::getStackSlot(unsigned virtReg)
{ {
// use lower_bound so that we can do a possibly O(1) insert later // use lower_bound so that we can do a possibly O(1) insert later
// if necessary // if necessary
Virt2StackSlotMap::iterator it = v2ssMap_.lower_bound(virtReg); Virt2StackSlotMap::iterator it = v2ssMap_.find(virtReg);
if (it != v2ssMap_.end() && it->first == virtReg) { assert(it != v2ssMap_.end() &&
return it->second; "attempt to get stack slot on register that does not live on the stack");
} return it->second;
const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(virtReg);
int frameIndex = mf_->getFrameInfo()->CreateStackObject(rc);
v2ssMap_.insert(it, std::make_pair(virtReg, frameIndex));
return frameIndex;
} }
void RA::spillVirtReg(unsigned virtReg) void RA::spillVirtReg(unsigned virtReg)
{ {
DEBUG(std::cerr << "\t\t\tspilling register: " << virtReg); DEBUG(std::cerr << "\t\t\tspilling register: " << virtReg);
const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(virtReg); const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(virtReg);
int frameIndex = findOrCreateStackSlot(virtReg); int frameIndex = getStackSlot(virtReg);
DEBUG(std::cerr << " to stack slot #" << frameIndex << '\n'); DEBUG(std::cerr << " to stack slot #" << frameIndex << '\n');
++numSpilled; ++numSpilled;
instrAdded_ += mri_->storeRegToStackSlot(*currentMbb_, currentInstr_, instrAdded_ += mri_->storeRegToStackSlot(*currentMbb_, currentInstr_,
@ -783,7 +780,7 @@ void RA::loadVirt2PhysReg(unsigned virtReg, unsigned physReg)
{ {
DEBUG(std::cerr << "\t\t\tloading register: " << virtReg); DEBUG(std::cerr << "\t\t\tloading register: " << virtReg);
const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(virtReg); const TargetRegisterClass* rc = mf_->getSSARegMap()->getRegClass(virtReg);
int frameIndex = findOrCreateStackSlot(virtReg); int frameIndex = getStackSlot(virtReg);
DEBUG(std::cerr << " from stack slot #" << frameIndex << '\n'); DEBUG(std::cerr << " from stack slot #" << frameIndex << '\n');
instrAdded_ += mri_->loadRegFromStackSlot(*currentMbb_, currentInstr_, instrAdded_ += mri_->loadRegFromStackSlot(*currentMbb_, currentInstr_,
physReg, frameIndex, rc); physReg, frameIndex, rc);