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Imported Upstream version 6.4.0.137

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Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
2019-07-26 19:53:28 +00:00
parent e9207cf623
commit ef583813eb
2712 changed files with 74169 additions and 40587 deletions
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12
external/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp vendored
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@@ -917,6 +917,8 @@ int AArch64FrameLowering::resolveFrameIndexReference(const MachineFunction &MF,
int FPOffset = MFI.getObjectOffset(FI) + FixedObject + 16;
int Offset = MFI.getObjectOffset(FI) + MFI.getStackSize();
bool isFixed = MFI.isFixedObjectIndex(FI);
bool isCSR = !isFixed && MFI.getObjectOffset(FI) >=
-((int)AFI->getCalleeSavedStackSize());
// Use frame pointer to reference fixed objects. Use it for locals if
// there are VLAs or a dynamically realigned SP (and thus the SP isn't
@@ -930,6 +932,12 @@ int AArch64FrameLowering::resolveFrameIndexReference(const MachineFunction &MF,
// Argument access should always use the FP.
if (isFixed) {
UseFP = hasFP(MF);
} else if (isCSR && RegInfo->needsStackRealignment(MF)) {
// References to the CSR area must use FP if we're re-aligning the stack
// since the dynamically-sized alignment padding is between the SP/BP and
// the CSR area.
assert(hasFP(MF) && "Re-aligned stack must have frame pointer");
UseFP = true;
} else if (hasFP(MF) && !RegInfo->hasBasePointer(MF) &&
!RegInfo->needsStackRealignment(MF)) {
// Use SP or FP, whichever gives us the best chance of the offset
@@ -947,9 +955,9 @@ int AArch64FrameLowering::resolveFrameIndexReference(const MachineFunction &MF,
}
}
assert((isFixed || !RegInfo->needsStackRealignment(MF) || !UseFP) &&
assert(((isFixed || isCSR) || !RegInfo->needsStackRealignment(MF) || !UseFP) &&
"In the presence of dynamic stack pointer realignment, "
"non-argument objects cannot be accessed through the frame pointer");
"non-argument/CSR objects cannot be accessed through the frame pointer");
if (UseFP) {
FrameReg = RegInfo->getFrameRegister(MF);