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Fix a case where debug_value was perturbing the

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line number info.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2010-01-19 22:50:05 +00:00
parent d8d0b6a42c
commit bbe2bbeac8
1 changed files with 19 additions and 4 deletions
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23
lib/Target/X86/X86RegisterInfo.cpp
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@ -666,6 +666,23 @@ X86RegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
}
}
/// findDebugLoc - find the next valid DebugLoc starting at MBBI, skipping
/// any DEBUG_VALUE instructions. Return UnknownLoc if there is none.
static
DebugLoc findDebugLoc(MachineBasicBlock::iterator &MBBI, MachineBasicBlock &MBB) {
DebugLoc DL;
if (MBBI != MBB.end()) {
// Skip debug declarations, we don't want a DebugLoc from them.
MachineBasicBlock::iterator MBBI2 = MBBI;
while (MBBI2 != MBB.end() &&
MBBI2->getOpcode()==TargetInstrInfo::DEBUG_VALUE)
MBBI2++;
if (MBBI2 != MBB.end())
DL = MBBI2->getDebugLoc();
}
return DL;
}
/// emitSPUpdate - Emit a series of instructions to increment / decrement the
/// stack pointer by a constant value.
static
@ -682,8 +699,7 @@ void emitSPUpdate(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI,
(Is64Bit ? X86::ADD64ri8 : X86::ADD32ri8) :
(Is64Bit ? X86::ADD64ri32 : X86::ADD32ri));
uint64_t Chunk = (1LL << 31) - 1;
DebugLoc DL = (MBBI != MBB.end() ? MBBI->getDebugLoc() :
DebugLoc::getUnknownLoc());
DebugLoc DL = findDebugLoc(MBBI, MBB);
while (Offset) {
uint64_t ThisVal = (Offset > Chunk) ? Chunk : Offset;
@ -1032,8 +1048,7 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
}
}
if (MBBI != MBB.end())
DL = MBBI->getDebugLoc();
DL = findDebugLoc(MBBI, MBB);
// Adjust stack pointer: ESP -= numbytes.
if (NumBytes >= 4096 && Subtarget->isTargetCygMing()) {