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

simplify and commonize some of the asmprinter logic for globals.

This also avoids printing the MCSection for .zerofill, which broke
the llvm-gcc build.

llvm-svn: 93843

1. TargetLoweringObjectFileMachO should decide if something
   goes in zerofill instead of having every target do it.
2. TargetLoweringObjectFileMachO should assign said symbols to
   the right MCSection, the asmprinters should just emit to the
   right section.
3. Since all zerofill stuff goes through mcstreamer anymore,
   MAI can have a bool "haszerofill" instead of having the textual
   directive to emit.

llvm-svn: 93838

to Mangler.  Now MCSymbol just decides whether to slap quotes around
a symbol when printing it.

This also fixes some weirdness where two MCSymbols could be created
for the same symbol, if one needed to be mangled and got mangled to
the other one.

llvm-svn: 93690