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[PR2327] Leverage TargetRegisterInfo to compute frame offsets for GC metadata.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54994 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Gordon Henriksen 2008-08-19 17:06:35 +00:00
parent 2d450ebe18
commit fcbcfaa95f
1 changed files with 5 additions and 7 deletions
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12
lib/CodeGen/GCStrategy.cpp
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@ -26,6 +26,7 @@
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/Compiler.h"
using namespace llvm;
@ -356,14 +357,12 @@ void MachineCodeAnalysis::FindSafePoints(MachineFunction &MF) {
}
void MachineCodeAnalysis::FindStackOffsets(MachineFunction &MF) {
uint64_t StackSize = MFI->getStackSize();
uint64_t OffsetAdjustment = MFI->getOffsetAdjustment();
uint64_t OffsetOfLocalArea = TM->getFrameInfo()->getOffsetOfLocalArea();
const TargetRegisterInfo *TRI = TM->getRegisterInfo();
assert(TRI && "TargetRegisterInfo not available!");
for (GCFunctionInfo::roots_iterator RI = FI->roots_begin(),
RE = FI->roots_end(); RI != RE; ++RI)
RI->StackOffset = MFI->getObjectOffset(RI->Num) + StackSize
- OffsetOfLocalArea + OffsetAdjustment;
RI->StackOffset = TRI->getFrameIndexOffset(MF, RI->Num);
}
bool MachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) {
@ -378,10 +377,9 @@ bool MachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) {
TM = &MF.getTarget();
MMI = &getAnalysis<MachineModuleInfo>();
TII = TM->getInstrInfo();
MFI = MF.getFrameInfo();
// Find the size of the stack frame.
FI->setFrameSize(MFI->getStackSize());
FI->setFrameSize(MF.getFrameInfo()->getStackSize());
// Find all safe points.
FindSafePoints(MF);