Author: dim
Date: Sun May 28 18:18:01 2017
New Revision: 319082
URL: https://svnweb.freebsd.org/changeset/base/319082
Log:
MFC r318906:
Pull in r303257 from upstream llvm trunk (by Krzysztof Parzyszek)
[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
Modified:
stable/11/contrib/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/contrib/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp
==============================================================================
--- stable/11/contrib/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp Sun May
28 18:13:44 2017 (r319081)
+++ stable/11/contrib/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp Sun May
28 18:18:01 2017 (r319082)
@@ -1775,32 +1775,37 @@ void PPCFrameLowering::processFunctionBe
// 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
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