it is highly specific to the object file that will be generated in the end,
this introduces a new TargetLoweringObjectFile interface that is implemented
for each of ELF/MachO/COFF/Alpha/PIC16 and XCore.

Though still is still a brutal and ugly refactoring, this is a major step
towards goodness.

This patch also:
1. fixes a bunch of dangling pointer problems in the PIC16 backend.
2. disables the TargetLowering copy ctor which PIC16 was accidentally using.
3. gets us closer to xcore having its own crazy target section flags and
   pic16 not having to shadow sections with its own objects.
4. fixes wierdness where ELF targets would set CStringSection but not
   CStringSection_.  Factor the code better.
5. fixes some bugs in string lowering on ELF targets.

llvm-svn: 77294

MCSections soon instead of Section for all targets, and we need something to
own them.

llvm-svn: 77252

instead and drive things based off of that.

llvm-svn: 77184

llvm-svn: 77152

just use a smallstring instead.

llvm-svn: 77144

to its classification.

llvm-svn: 77140

llvm-svn: 77138

llvm-svn: 77137

llvm-svn: 77134

Also, change MDString to use a StringRef.

llvm-svn: 77098

llvm-svn: 76970

eliminating isNamed.

llvm-svn: 76946

Put comment printing under asm-verbose.

llvm-svn: 76780

a new getSectionForMergableConstant hook.  This removes one dependence
of TAI on Type, and provides the hook with enough info to make the 
right decision based on whether the global has relocations etc.

llvm-svn: 76705

and call PrintGlobalVariable, allowing elimination and simplification
of various targets.

llvm-svn: 76604

LLVM IR concept.

llvm-svn: 76590

"LinkerPrivatePrefix". It seems to have been used in only one place before I
started this "linker_private" business. I'm thinking that a rename is in
order...

llvm-svn: 76479

doesn't cause ".no_dead_strip" to be emitted on darwin.

llvm-svn: 76399

llvm-svn: 76246

llvm-svn: 76237

emit the EHFrame label next to the section_eh_frame and
eh_frame_common labels.

llvm-svn: 76234

starting in getCurrentFunctionEHName.  Among other problems,
we would try to privative a "foo.eh" label, but end up emitting
the label as _Lfoo.eh instead of L_foo.eh on darwin.  This is really
bad, and the linker has always tolerated these labels existing.
For now, just emit them as _foo.eh.

This patch also fixes problems with ".eh" labels on unnamed
functions and eliminates two strangely defined TargetAsmInfo
hooks.

llvm-svn: 76231

llvm-svn: 76228

Emit line numbers in asm comments when available.

llvm-svn: 76117

This prefix is used by LLVM to inform the asm printer to not emit usual global symbol prefix before the symbol name.

llvm-svn: 75875

llvm-svn: 75742

Have asm printers use formatted_raw_ostream directly to avoid a
dynamic_cast<>.

llvm-svn: 75670

additional bug fixes:

1. The bug that everyone hit was a problem in the asmprinter where it
   would remove $stub but keep the L prefix on a name when emitting the
   indirect symbol.  This is easy to fix by keeping the name of the stub
   and the name of the symbol in a StringMap instead of just keeping a
   StringSet and trying to reconstruct it late.

2. There was a problem printing the personality function.  The current
   logic to print out the personality function from the DWARF information
   is a bit of a cesspool right now that duplicates a bunch of other 
   logic in the asm printer.  The short version of it is that it depends
   on emitting both the L and _ prefix for symbols (at least on darwin)
   and until I can untangle it, it is best to switch the mangler back to
   emitting both prefixes.

llvm-svn: 75646

This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").

llvm-svn: 75640

--- Reverse-merging r75619 into '.':
U    lib/Target/DarwinTargetAsmInfo.cpp
U    lib/CodeGen/AsmPrinter/AsmPrinter.cpp
--- Reverse-merging r75618 into '.':
U    lib/CodeGen/ELFWriter.cpp
U    lib/CodeGen/MachOCodeEmitter.cpp
U    lib/CodeGen/MachOWriter.cpp
--- Reverse-merging r75617 into '.':
U    lib/Target/CBackend/CBackend.cpp
--- Reverse-merging r75616 into '.':
U    tools/bugpoint/Miscompilation.cpp
U    tools/lto/LTOCodeGenerator.cpp
U    tools/lto/LTOModule.cpp

llvm-svn: 75638

dubious looking things that I need to investigate in more detail.

llvm-svn: 75619

indicates whether the label is private or not, instead of taking
prefix stuff.  One effect of this is that symbols will be generated
with *just* the private prefix, instead of both the private prefix
*and* the user-label-prefix, but this doesn't matter as long as it
is consistent.  For example we'll now get "Lfoo" instead of "L_foo".
These are just assembler temporary labels anyway, so they never even
make it into the .o file.

llvm-svn: 75607

llvm-svn: 75574

llvm-svn: 75540

llvm-svn: 75515

llvm-svn: 75507

llvm-svn: 75503

Add infrastructure to allow post instruction printing action triggers.
We'll eventually use this to print comments in asm files and do other
fun things.

This adds interfaces to the AsmPrinter and changes TableGen to invoke
the postInstructionAction when appropriate.  It also add parameters to
TargetAsmInfo to control comment layout.

llvm-svn: 75490

Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.

llvm-svn: 75379

and abort()/exit() -> llvm_report_error().

llvm-svn: 75363