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- Really preserve dbg_value instructions when the register is spilled.

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- Also, update dbg_value is the value is being re-matted from a frame slot, e.g. fixed slots for arguments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102565 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2010-04-28 23:52:26 +00:00
parent f38c6c89f1
commit 6691a8935c
1 changed files with 3 additions and 2 deletions
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5
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -1297,11 +1297,12 @@ rewriteInstructionsForSpills(const LiveInterval &li, bool TrySplit,
++ri;
if (MI->isDebugValue()) {
// Modify DBG_VALUE now that the value is in a spill slot.
if (Slot == VirtRegMap::NO_STACK_SLOT) {
if (Slot != VirtRegMap::MAX_STACK_SLOT || isLoadSS) {
uint64_t Offset = MI->getOperand(1).getImm();
const MDNode *MDPtr = MI->getOperand(2).getMetadata();
DebugLoc DL = MI->getDebugLoc();
if (MachineInstr *NewDV = tii_->emitFrameIndexDebugValue(*mf_, Slot,
int FI = isLoadSS ? LdSlot : (int)Slot;
if (MachineInstr *NewDV = tii_->emitFrameIndexDebugValue(*mf_, FI,
Offset, MDPtr, DL)) {
DEBUG(dbgs() << "Modifying debug info due to spill:" << "\t" << *MI);
ReplaceMachineInstrInMaps(MI, NewDV);