the .zerofill directive emission to not be darwin-specific

llvm-svn: 33304

non-statics.
* Introduce new option to output zero-initialized data to .bss section.
This can reduce size of binaries. Enable it by default for ELF &
Cygwin/Mingw targets. Probably, Darwin should be also added.

llvm-svn: 33299

llvm-svn: 33256

llvm-svn: 33198

llvm-svn: 33191

* PIC-aware internal structures in X86 Codegen have been refactored
* Visibility (default/weak) has been added
* Docs fixes (external weak linkage, visibility, formatting)

llvm-svn: 33136

- New target type "mingw" was introduced
- Same things for both mingw & cygwin are marked as "cygming" (as in
gcc)
- .lcomm is supported here, so allow LLVM to use it
- Correctly use underscored versions of setjmp & _longjmp for both mingw
& cygwin

llvm-svn: 32833

llvm-svn: 32703

llvm-svn: 32648

if a variable has no initialization, I->getInitializer() will fail

llvm-svn: 32407

is 'unsigned'.

llvm-svn: 32279

llvm-svn: 32091

A initialized global variable cannot be extern weak. However, if a global value's initializer is itself a external weak symbol, emit the weak reference.

llvm-svn: 32069

llvm-svn: 32067

llvm-svn: 32066

llvm-svn: 32065

llvm-svn: 32052

llvm-svn: 31327

2. Added partial debug support for mingw\cygwin targets (the same as
   Linux\ELF). Please note, that currently mingw\cygwin uses 'stabs' format
   for storing debug info by default, thus many (runtime) libraries has
   this information included. These formats shouldn't be mixed in one binary
   ('stabs' & 'DWARF'), otherwise binutils tools will be confused.

llvm-svn: 31311

Defaulting second arguments of SwitchTo*Section, this should make things
somehow clearer.

llvm-svn: 31306

llvm-svn: 31304

llvm-svn: 31303

generated object modules to be debugged with gdb. Hopefully this helps
pre-release debugging.

llvm-svn: 31299

llvm-svn: 31252

llvm-svn: 31203

llvm-svn: 31171

This will allow (after llvm-gcc linkage fix) more dummy tests using
libstdc++ to pass on mingw :)

llvm-svn: 31120

Added workaround for linker bug with linkonce sections.
Changed sections prefix to allow linker merge them
(PE loader doesn't like too much long-named sections :) )
All of this unbreaks libstdc++ on mingw32 allowing (small)
programs to be compiled, linked and run.

llvm-svn: 31033

targets.

llvm-svn: 31011

llvm-svn: 30964

llvm-svn: 30608

llvm-svn: 30549

Added X86 StdCall & FastCall calling conventions. Codegen will follow.

llvm-svn: 30446

DLL* linkages got full (I hope) codegeneration support in C & both x86
assembler backends.
External weak linkage added for future use, we don't provide any
codegeneration, etc. support for it.

llvm-svn: 30374

llvm-svn: 30177

llvm-svn: 30162

llvm-svn: 30146

llvm-svn: 30126

the number of relocations in object files, shrinkifying them.

llvm-svn: 29650

llvm-svn: 29322