Fix a major regression on COFF targets introduced by r103267: 'discardable' section means that it is used only during the program load and can be discarded afterwards.
This way *only* debug sections can be discarded, but not the opposite. Seems like the copy-and-pasto from ELF code, since there it contains the reverse flag ('alloc').

llvm-svn: 107658

Spencer!

llvm-svn: 107418

llvm-svn: 107215

metadata types which should be marked as "weak", but which the linker will
remove upon final linkage. For example, the "objc_msgSend_fixup_alloc" symbol is
defined like this:

       .globl l_objc_msgSend_fixup_alloc
       .weak_definition l_objc_msgSend_fixup_alloc
       .section __DATA, __objc_msgrefs, coalesced
       .align 3
l_objc_msgSend_fixup_alloc:
        .quad   _objc_msgSend_fixup
        .quad   L_OBJC_METH_VAR_NAME_1

This is different from the "linker_private" linkage type, because it can't have
the metadata defined with ".weak_definition".

llvm-svn: 107205

and testcases accordingly.

llvm-svn: 104635

llvm-svn: 104414

and cleanup comments as well.

llvm-svn: 103985

llvm-svn: 103974

llvm-svn: 103304

patch by Peter Housel!

llvm-svn: 103267

patch by Sylvere Teissier!

llvm-svn: 101106

llvm-svn: 100815

merge XCore's section into MCSectionELF

llvm-svn: 100812

api and update clients to use MCContext instead.

llvm-svn: 100808

the compiler and asmparser now unique to the same sections.  This fixes
rdar://7835021.

llvm-svn: 100807

llvm-svn: 100709

create symbols.  It is extremely error prone and a source of a lot
of the remaining integrated assembler bugs on x86-64.

This fixes rdar://7807601.

llvm-svn: 99902

section, remove the target-specific code that performs this.

llvm-svn: 98580

llvm-svn: 98577

MCSectionMachO is already fine (yay for fixed size arrays?),
MCSectionCOFF still leaks.

llvm-svn: 98537

where we used ot create an MCSymbol for ".".  Now emit an assembler
temporary label and reference it instead of "." textually.

rdar://7739457

llvm-svn: 98292

an MCExpr and not an MCSymbol.  Change it to take an MCStreamer,
which is currently unused.

No functionality change.

llvm-svn: 98278

indicates that an MCSymbol is external or not. (It's true if it's external.)
This will be used to specify the correct information to add to non-lazy
pointers. That will be explained further when this bit is used.

llvm-svn: 98199

semantic instead of syntactic.  This completes MCization of
darwin/x86[-64]!

llvm-svn: 98145

llvm-svn: 98124

llvm-svn: 97895

is a workaround for <rdar://problem/7672401/> (which I filed).

This let's us build Wine on Darwin, and it gets the Qt build there a little bit
further (so Doug says).

llvm-svn: 97845

--- Reverse-merging r97592 into '.':
U    lib/CodeGen/TargetLoweringObjectFileImpl.cpp

llvm-svn: 97657

Place the LSDA into the TEXT section on Mach-O. This saves space.

llvm-svn: 97592

llvm-svn: 97295

It turned out that we failed to emit proper symbol stubs on non-x86/darwin for ages (we emitted a reference to a stub, but no stub was emitted). The code inside x86-32/macho target objfile lowering should actually be the generic one - move it there.

This (I really, really hope) should fix EH issues on ppc/darwin
and arm/darwin.

llvm-svn: 96755

ARM and Thumb tests.

llvm-svn: 96680

This hopefulyl should unbreak EH on PPC/Darwin.

llvm-svn: 96637

llvm-svn: 96288

llvm-svn: 96286

Preliminary patch to improve dwarf EH generation - Hooks to return Personality / FDE / LSDA / TType encoding depending on target / options (e.g. code model / relocation model) - MCIzation of Dwarf EH printer to use encoding information - Stub generation for ELF target (needed for indirect references) - Some other small changes here and there

llvm-svn: 96285

llvm-svn: 94189

.zerofill directive.  Streamerize its generation.

llvm-svn: 93868

and everything else (weak).

llvm-svn: 93846

GCC would put weak zero initialized mutable data in the .bss section,
we would put it into a crasy '.gnu.linkonce.b.test,"aw",@nobits' 
section.  Fixing this will allow simplifications next up.

llvm-svn: 93844