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

llvm-svn: 93664

llvm-svn: 93628

llvm-svn: 93627

obsolete Mangler interfaces.

llvm-svn: 93356

SelectSectionForGlobal, unbreaking weak globals with no-name.

llvm-svn: 93336

on linux (even though they are pointless, they shouldn't ICE).

llvm-svn: 93308

llvm-svn: 93305

instead of returning it in an std::string.  Based on this change:

1. Change TargetLoweringObjectFileCOFF::getCOFFSection to take a StringRef
2. Change a bunch of targets to call makeNameProper with a smallstring,
   making several of them *much* more efficient.
3. Rewrite Mangler::makeNameProper to not build names and then prepend
   prefixes, not use temporary std::strings, and to avoid other crimes.

llvm-svn: 93298

not-readonly segment on darwin.

llvm-svn: 92933

$ svn merge -c -89279 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r89279 into '.':
U    lib/CodeGen/AsmPrinter/DwarfException.cpp
U    lib/Target/TargetLoweringObjectFile.cpp
$ svn merge -c -89270 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r89270 into '.':
G    lib/CodeGen/AsmPrinter/DwarfException.cpp
G    lib/Target/TargetLoweringObjectFile.cpp

llvm-svn: 89379

exception table than DataRel.

llvm-svn: 89279

Place the EH table in the __TEXT section on MachO. It saves space.

llvm-svn: 89270

llvm-svn: 86367

llvm-svn: 86251

U    lib/CodeGen/AsmPrinter/DwarfException.cpp
U    lib/CodeGen/AsmPrinter/DwarfException.h

--- Reverse-merging r82274 into '.':
U    lib/Target/TargetLoweringObjectFile.cpp
G    lib/CodeGen/AsmPrinter/DwarfException.cpp

These revisions were breaking everything.

llvm-svn: 82396

llvm-svn: 82356

internal, they shouldn't use the indirect pointer stuff. In the case of
throw_rethrow_test, it was marked as 'internal' and calculated its own offset to
its contents.

llvm-svn: 82354

llvm-svn: 82336

into the __DATA section. At launch time, dyld has to update most of the section
to fix up the type info pointers. It's better to place it into the __TEXT
section and use pc-rel indirect pointer encodings. Similar to the personality
routine.

llvm-svn: 82274

currently unused.

llvm-svn: 82157

Eliminate the PersonalityPrefix/Suffix & NeedsIndirectEncoding
fields from MAI: they aren't part of the asm syntax, they are
related to the structure of the object file.

To replace their functionality, add a new 
TLOF::getSymbolForDwarfGlobalReference method which asks targets
to decide how to reference a global from EH in a pc-relative way.

The default implementation just returns the symbol.  The default
darwin implementation references the symbol through an indirect
$non_lazy_ptr stub.  The bizarro x86-64 darwin specialization
handles the weird "foo@GOTPCREL+4" hack.

DwarfException.cpp now uses this to emit the reference to the
symbol in the right way, and this also eliminates another 
horrible hack from DwarfException.cpp:

-    if (strcmp(MAI->getPersonalitySuffix(), "+4@GOTPCREL"))
-      O << "-" << MAI->getPCSymbol();

llvm-svn: 81991

llvm-svn: 81322

llvm-svn: 81321

llvm-svn: 80176

llvm-svn: 79346

Patch by Dmitry Gorbachev!

llvm-svn: 79334

Clear the uniquing table when initializing TLOF to avoid a crash when the TLOF is reinitialized with a different MCContext.

llvm-svn: 79253

if not supported by the ELF subtarget.

llvm-svn: 79249

is why they are datarel).  This should fix PR4724, and is fallout
from r78890.

llvm-svn: 79111

them to null out the default section pointers.

llvm-svn: 79078

accidentally match unrelated things.

llvm-svn: 78966

must be emitted for PowerPC-Linux '.bss' section

llvm-svn: 78958

syntactically as a string, very similiar to what Chris did with MachO.
The parsing support and validation is not introduced yet.

llvm-svn: 78890

MCContext no longer maintains a string -> section map.

llvm-svn: 78874

them, so it doesn't have to explicitly free them.

llvm-svn: 78870

int x __attribute__((section("_foo, _bar"))) = 4;
int y __attribute__((section("_foo, _bar, 4byte_literals"))) = 1;

llvm-svn: 78867

llvm-svn: 78866