d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Pull in r303257 from upstream llvm trunk (by Krzysztof Parzyszek)

Browse Source 
[PPC] Properly update register save area offsets

  The variables MinGPR/MinG8R were not updated properly when resetting the
  offsets, which in the included testcase lead to saving the CR register
  in the same location as R30.

  This fixes another issue reported in PR26519.

  Differential Revision: https://reviews.llvm.org/D33017

Reported by:	Mark Millard
PR:		206990
MFC after:	3 days
This commit is contained in:
Dimitry Andric 2017-05-25 23:14:51 +00:00
parent fd8245d704
commit e26b433edd
1 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
contrib/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
View File

@ -1775,32 +1775,37 @@ void PPCFrameLowering::processFunctionBeforeFrameFinalized(MachineFunction &MF,
// Check whether the frame pointer register is allocated. If so, make sure it
// is spilled to the correct offset.
if (needsFP(MF)) {
HasGPSaveArea = true;
int FI = PFI->getFramePointerSaveIndex();
assert(FI && "No Frame Pointer Save Slot!");
MFI.setObjectOffset(FI, LowerBound + MFI.getObjectOffset(FI));
// FP is R31/X31, so no need to update MinGPR/MinG8R.
HasGPSaveArea = true;
}
if (PFI->usesPICBase()) {
HasGPSaveArea = true;
int FI = PFI->getPICBasePointerSaveIndex();
assert(FI && "No PIC Base Pointer Save Slot!");
MFI.setObjectOffset(FI, LowerBound + MFI.getObjectOffset(FI));
MinGPR = std::min<unsigned>(MinGPR, PPC::R30);
HasGPSaveArea = true;
}
const PPCRegisterInfo *RegInfo =
static_cast<const PPCRegisterInfo *>(Subtarget.getRegisterInfo());
if (RegInfo->hasBasePointer(MF)) {
HasGPSaveArea = true;
int FI = PFI->getBasePointerSaveIndex();
assert(FI && "No Base Pointer Save Slot!");
MFI.setObjectOffset(FI, LowerBound + MFI.getObjectOffset(FI));
unsigned BP = RegInfo->getBaseRegister(MF);
if (PPC::G8RCRegClass.contains(BP)) {
MinG8R = std::min<unsigned>(MinG8R, BP);
HasG8SaveArea = true;
} else if (PPC::GPRCRegClass.contains(BP)) {
MinGPR = std::min<unsigned>(MinGPR, BP);
HasGPSaveArea = true;
}
}
// General register save area starts right below the Floating-point