forked from OSchip/llvm-project
a9968c0a33
Currently needsStackRealignment returns false if canRealignStack returns false. This means that the behavior of needsStackRealignment does not correspond to it's name and description; a function might need stack realignment, but if it is not possible then this function returns false. Furthermore, needsStackRealignment is not virtual and therefore some backends have made use of canRealignStack to indicate whether a function needs stack realignment. This patch attempts to clarify the situation by separating them and introducing new names: - shouldRealignStack - true if there is any reason the stack should be realigned - canRealignStack - true if we are still able to realign the stack (e.g. we can still reserve/have reserved a frame pointer) - hasStackRealignment = shouldRealignStack && canRealignStack (not target customisable) Targets can now override shouldRealignStack to indicate that stack realignment is required. This change will make it easier in a future change to handle the case where we need to realign the stack but can't do so (for example when the register allocator creates an aligned spill after the frame pointer has been eliminated). Differential Revision: https://reviews.llvm.org/D98716 Change-Id: Ib9a4d21728bf9d08a545b4365418d3ffe1af4d87 |
||
|---|---|---|
| .. | ||
| AsmParser | ||
| Disassembler | ||
| MCTargetDesc | ||
| TargetInfo | ||
| CMakeLists.txt | ||
| Lanai.h | ||
| Lanai.td | ||
| LanaiAluCode.h | ||
| LanaiAsmPrinter.cpp | ||
| LanaiCallingConv.td | ||
| LanaiCondCode.h | ||
| LanaiDelaySlotFiller.cpp | ||
| LanaiFrameLowering.cpp | ||
| LanaiFrameLowering.h | ||
| LanaiISelDAGToDAG.cpp | ||
| LanaiISelLowering.cpp | ||
| LanaiISelLowering.h | ||
| LanaiInstrFormats.td | ||
| LanaiInstrInfo.cpp | ||
| LanaiInstrInfo.h | ||
| LanaiInstrInfo.td | ||
| LanaiMCInstLower.cpp | ||
| LanaiMCInstLower.h | ||
| LanaiMachineFunctionInfo.cpp | ||
| LanaiMachineFunctionInfo.h | ||
| LanaiMemAluCombiner.cpp | ||
| LanaiRegisterInfo.cpp | ||
| LanaiRegisterInfo.h | ||
| LanaiRegisterInfo.td | ||
| LanaiSchedule.td | ||
| LanaiSelectionDAGInfo.cpp | ||
| LanaiSelectionDAGInfo.h | ||
| LanaiSubtarget.cpp | ||
| LanaiSubtarget.h | ||
| LanaiTargetMachine.cpp | ||
| LanaiTargetMachine.h | ||
| LanaiTargetObjectFile.cpp | ||
| LanaiTargetObjectFile.h | ||
| LanaiTargetTransformInfo.h | ||