In some cases such as interpreters using indirectbr, the CFG can be very
complicated, and live range splitting may be forced to insert a large
number of phi-defs.  When that happens, traceSiblingValue can spend a
lot of time zipping around in the CFG looking for defs and reloads.

This patch causes more information to be cached in SibValues, and the
cached values are used to terminate searches early.  This speeds up
spilling by 20x in one interpreter test case.  For more typical code,
this is just a 10% speedup of spilling.

The previous version had bugs that caused miscompilations. They have
been fixed.

llvm-svn: 139378

 --show-aliases (-a) shows aliases for commands, as well as built-in commands
 --hide-user-defined (-u) hides user defined commands
by default 'help' without arguments does not show aliases anymore. to see them, add --show-aliases
to have only built-in commands appear, use 'help --hide-user-defined' ; there is currently no way to hide
built-in commands from the help output
'help command' is not changed by this commit, and help is shown even if command is an alias and -a is not specified

llvm-svn: 139377

./build-swig-Python.sh: line 76: INTERFACE_FILES: command not found

when running SWIG, which was introduced during the last checkin.

llvm-svn: 139376

llvm-svn: 139375

llvm-svn: 139374

construct a new DeclRefExpr rather than re-using the existing
DeclRefExpr. Patch by Likai Liu, fixes PR8345.

llvm-svn: 139373

llvm-svn: 139372

llvm-svn: 139371

Thread safety: This patch deals with previously unhandled cases when building lock expressions. We now resolve this expressions, avoid crashing when encountering cast expressions, and have a diagnostic for unresolved lock expressions

llvm-svn: 139370

llvm-svn: 139369

llvm-svn: 139368

llvm-svn: 139367

llvm-svn: 139364

llvm-svn: 139363

llvm-svn: 139362

what 'nullPos' is supposed to mean, at least at this one site.
Use closed forms for the arithmetic.  Rip out some clever but
ultimately pointless code that was trying to use 0 or 0L depending
the size of a pointer vs. the size of int;  first, it didn't work
on LLP64 systems, and second, the sentinel checking code requires
a pointer-typed value anyway, so this fixit would not have actually
removed the warning.

llvm-svn: 139361

any given function.  As pointed out by John McCall, this is needed to
have redundant eh.typeid.for tests be eliminated in the presence of
cleanups.

llvm-svn: 139360

instead of codegen waiting to consume such a declaration, which won't
happen if that decls are coming from a PCH.

Fixes rdar://10028656.

llvm-svn: 139359

in the translation unit.

llvm-svn: 139358

llvm-svn: 139357

llvm-svn: 139356

llvm-svn: 139355

converting to an arbitrary Objective-C pointer type is.  Without
significantly re-implementing anything, change the API to reflect this,
and as a minor optimization, strip the pointer conversion off before
potentially building it.

Mostly, this removes a really bizarre-looking bit of code from
BuildInstanceMessage.

llvm-svn: 139354

Fix handling of Intel syntax disassembling of movs and stos to stop being blank. Also fixed scas, and cmps to always print size suffix in Intel syntax since its abiguous without arguments. Fixes PR10875.

llvm-svn: 139353

than conversions of C pointers to ObjC pointers.  In order to ensure that
we've caught every case, add asserts to CastExpr that strictly determine
which cast kind is used for which kind of bit cast.

llvm-svn: 139352

Clean up the RebuildUnknownAnyExpr visitor in SemaExpr.cpp.  Mainly swapped around variable names so that this visitor be more like other visitors in clang.

llvm-svn: 139351

Changed references of BaseTy, MemInitTy, CXXScopeTy, TemplateParamsTy to CXXBaseSpecifier, CXXCtorInitializer, NestedNameSpecifier, TemplateParameterList and removed their typedefs.

llvm-svn: 139350

Change references to StmtTy to Stmt and removed typedefs of StmtTy.  Also removed typedef of AttrTy since it is not used.

llvm-svn: 139349

indicates that a declaration is only visible within the module it is
declared in.

llvm-svn: 139348

llvm-svn: 139347

Capitialize paramater names in SemaExpr.cpp and resolve any parameter name conflicts between declarations and definitions from this and previous refactorings.

llvm-svn: 139346

llvm-svn: 139345

removing support for Mips1 and Mips2. 

This change and the ones that follow have been discussed with and approved by
Bruno.

llvm-svn: 139344

llvm-svn: 139343

llvm-svn: 139342

MachOObjectFile.cpp:524: error: unused variable 'NumLoadCommands' [-Wunused-variable]

llvm-svn: 139341

llvm-svn: 139340

llvm-svn: 139339

llvm-svn: 139338

Basic infrastructure code to exploit malloc stack logging as available on Mac OS X to track the allocation history of pointers on the target process

llvm-svn: 139337