replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Make more explicit and add some currently disabled error messages for 

stack realignment on ARM.

Also check for function attributes as we do on X86 as well as
make explicit that we're checking can as well as needs in this function.

llvm-svn: 108582
This commit is contained in:
Eric Christopher 2010-07-17 00:27:24 +00:00
parent c0be37287c
commit 24e3aa011a
1 changed files with 18 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
llvm/lib/Target/ARM/ARMBaseRegisterInfo.cpp
View File

@ -627,12 +627,26 @@ bool ARMBaseRegisterInfo::canRealignStack(const MachineFunction &MF) const {
bool ARMBaseRegisterInfo::
needsStackRealignment(const MachineFunction &MF) const {
const MachineFrameInfo *MFI = MF.getFrameInfo();
const Function *F = MF.getFunction();
const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
return (RealignStack &&
!AFI->isThumb1OnlyFunction() &&
(MFI->getMaxAlignment() > StackAlign) &&
!MFI->hasVarSizedObjects());
bool requiresRealignment =
RealignStack && ((MFI->getMaxAlignment() > StackAlign) ||
F->hasFnAttr(Attribute::StackAlignment));
// FIXME: Currently we don't support stack realignment for functions with
// variable-sized allocas.
// FIXME: It's more complicated than this...
if (0 && requiresRealignment && MFI->hasVarSizedObjects())
report_fatal_error(
"Stack realignment in presense of dynamic allocas is not supported");
// FIXME: This probably isn't the right place for this.
if (0 && requiresRealignment && AFI->isThumb1OnlyFunction())
report_fatal_error(
"Stack realignment in thumb1 functions is not supported");
return requiresRealignment && canRealignStack(MF);
}
bool ARMBaseRegisterInfo::