diff options
Diffstat (limited to 'lib/CodeGen/GCRootLowering.cpp')
-rw-r--r-- | lib/CodeGen/GCRootLowering.cpp | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/lib/CodeGen/GCRootLowering.cpp b/lib/CodeGen/GCRootLowering.cpp index 9d38e4c..ac35165 100644 --- a/lib/CodeGen/GCRootLowering.cpp +++ b/lib/CodeGen/GCRootLowering.cpp @@ -332,19 +332,22 @@ bool GCMachineCodeAnalysis::runOnMachineFunction(MachineFunction &MF) { return false; FI = &getAnalysis<GCModuleInfo>().getFunctionInfo(*MF.getFunction()); - if (!FI->getStrategy().needsSafePoints()) - return false; - MMI = &getAnalysis<MachineModuleInfo>(); TII = MF.getSubtarget().getInstrInfo(); - // Find the size of the stack frame. - FI->setFrameSize(MF.getFrameInfo()->getStackSize()); + // Find the size of the stack frame. There may be no correct static frame + // size, we use UINT64_MAX to represent this. + const MachineFrameInfo *MFI = MF.getFrameInfo(); + const TargetRegisterInfo *RegInfo = MF.getSubtarget().getRegisterInfo(); + const bool DynamicFrameSize = MFI->hasVarSizedObjects() || + RegInfo->needsStackRealignment(MF); + FI->setFrameSize(DynamicFrameSize ? UINT64_MAX : MFI->getStackSize()); // Find all safe points. - FindSafePoints(MF); + if (FI->getStrategy().needsSafePoints()) + FindSafePoints(MF); - // Find the stack offsets for all roots. + // Find the concrete stack offsets for all roots (stack slots) FindStackOffsets(MF); return false; |