FTL unwind parsing should handle ARM64
https://bugs.webkit.org/show_bug.cgi?id=128984
Reviewed by Oliver Hunt.
This makes unwind parsing handle ARM64 and it makes all clients of unwind info capable of
dealing with that architecture.
The big difference is that ARM64 has callee-save double registers. This is conceptually easy
to handle, but out code for dealing with callee-saves spoke of "GPRReg". We've been in this
situation before: code that needs to deal with either a GPRReg or a FPRReg. In the past we'd
hacked around the problem, but this time I decided to do a full frontal assault. This patch
adds a Reg class, which is a box for either GPRReg or FPRReg along with tools for iterating
over all possible registers. Then, I threaded this through SaveRestore, RegisterSet,
RegisterAtOffset, and UnwindInfo. With the help of Reg, it was easy to refactor the code to
handle FPRs in addition to GPRs.
- CMakeLists.txt:
- GNUmakefile.list.am:
- JavaScriptCore.vcxproj/JavaScriptCore.vcxproj:
- JavaScriptCore.xcodeproj/project.pbxproj:
- ftl/FTLOSRExitCompiler.cpp:
(JSC::FTL::compileStub):
- ftl/FTLRegisterAtOffset.cpp:
(JSC::FTL::RegisterAtOffset::dump):
- ftl/FTLRegisterAtOffset.h:
(JSC::FTL::RegisterAtOffset::RegisterAtOffset):
(JSC::FTL::RegisterAtOffset::operator!):
(JSC::FTL::RegisterAtOffset::reg):
(JSC::FTL::RegisterAtOffset::operator==):
(JSC::FTL::RegisterAtOffset::operator<):
(JSC::FTL::RegisterAtOffset::getReg):
(JSC::FTL::offsetOfReg):
- ftl/FTLSaveRestore.h:
- ftl/FTLUnwindInfo.cpp:
(JSC::FTL::UnwindInfo::parse):
(JSC::FTL::UnwindInfo::find):
(JSC::FTL::UnwindInfo::indexOf):
- ftl/FTLUnwindInfo.h:
- jit/Reg.cpp: Added.
(JSC::Reg::dump):
(JSC::Reg::Reg):
(JSC::Reg::fromIndex):
(JSC::Reg::first):
(JSC::Reg::last):
(JSC::Reg::next):
(JSC::Reg::index):
(JSC::Reg::isSet):
(JSC::Reg::operator!):
(JSC::Reg::isGPR):
(JSC::Reg::isFPR):
(JSC::Reg::gpr):
(JSC::Reg::fpr):
(JSC::Reg::operator==):
(JSC::Reg::operator!=):
(JSC::Reg::operator<):
(JSC::Reg::operator>):
(JSC::Reg::operator<=):
(JSC::Reg::operator>=):
(JSC::Reg::hash):
(JSC::Reg::invalid):
(JSC::RegisterSet::set):
(JSC::RegisterSet::clear):
(JSC::RegisterSet::get):
