JF Bastien 9994b911f4 Targets: commonize some stack realignment code ... This patch does the following: * Fix FIXME on `needsStackRealignment`: it is now shared between multiple targets, implemented in `TargetRegisterInfo`, and isn't `virtual` anymore. This will break out-of-tree targets, silently if they used `virtual` and with a build error if they used `override`. * Factor out `canRealignStack` as a `virtual` function on `TargetRegisterInfo`, by default only looks for the `no-realign-stack` function attribute. Multiple targets duplicated the same `needsStackRealignment` code: - Aarch64. - ARM. - Mips almost: had extra `DEBUG` diagnostic, which the default implementation now has. - PowerPC. - WebAssembly. - x86 almost: has an extra `-force-align-stack` option, which the default implementation now has. The default implementation of `needsStackRealignment` used to just return `false`. My current patch changes the behavior by simply using the above shared behavior. This affects: - AMDGPU - BPF - CppBackend - MSP430 - NVPTX - Sparc - SystemZ - XCore - Out-of-tree targets This is a breaking change! `make check` passes. The only implementation of the `virtual` function (besides the slight different in x86) was Hexagon (which did `MF.getFrameInfo()->getMaxAlignment() > 8`), and potentially some out-of-tree targets. Hexagon now uses the default implementation. `needsStackRealignment` was being overwritten in `<Target>GenRegisterInfo.inc`, to return `false` as the default also did. That was odd and is now gone. Reviewers: sunfish Subscribers: aemerson, llvm-commits, jfb Differential Revision: http://reviews.llvm.org/D11160 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242727 91177308-0d34-0410-b5e6-96231b3b80d8		2015-07-20 22:51:32 +00:00
..
AsmMatcherEmitter.cpp
AsmWriterEmitter.cpp
AsmWriterInst.cpp
AsmWriterInst.h
CallingConvEmitter.cpp
CMakeLists.txt
CodeEmitterGen.cpp
CodeGenDAGPatterns.cpp
CodeGenDAGPatterns.h
CodeGenInstruction.cpp
CodeGenInstruction.h
CodeGenIntrinsics.h
CodeGenMapTable.cpp
CodeGenRegisters.cpp
CodeGenRegisters.h
CodeGenSchedule.cpp
CodeGenSchedule.h
CodeGenTarget.cpp
CodeGenTarget.h
CTagsEmitter.cpp
DAGISelEmitter.cpp
DAGISelMatcher.cpp
DAGISelMatcher.h
DAGISelMatcherEmitter.cpp
DAGISelMatcherGen.cpp
DAGISelMatcherOpt.cpp
DFAPacketizerEmitter.cpp
DisassemblerEmitter.cpp
FastISelEmitter.cpp
FixedLenDecoderEmitter.cpp
InstrInfoEmitter.cpp
IntrinsicEmitter.cpp
LLVMBuild.txt
Makefile
module.modulemap
OptParserEmitter.cpp
PseudoLoweringEmitter.cpp
RegisterInfoEmitter.cpp	Targets: commonize some stack realignment code	2015-07-20 22:51:32 +00:00
SequenceToOffsetTable.h
SubtargetEmitter.cpp
TableGen.cpp
TableGenBackends.h
tdtags
X86DisassemblerShared.h
X86DisassemblerTables.cpp
X86DisassemblerTables.h
X86ModRMFilters.cpp
X86ModRMFilters.h
X86RecognizableInstr.cpp
X86RecognizableInstr.h