MCSection subclasses yet, but this is a step in the right direction.

llvm-svn: 77708

Start using DebugInfoFinder.

llvm-svn: 77621

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

llvm-svn: 77152

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

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

llvm-svn: 74953

llvm-svn: 74949

llvm-svn: 74477

llvm-svn: 74452

Update dwarf writer to only emit one DW_TAG_compile_unit per .o file. 

llvm-svn: 74449

Remove debug info anchors - llvm.dbg.compile_units, llvm.dbg.subprograms
and llvm.dbg.global_variables.

llvm-svn: 74251

llvm-svn: 74215

llvm-svn: 74134

llvm-svn: 73736

llvm-svn: 73457

llvm-svn: 73426

llvm.dbg.region.end() intrinsic is not required to be in _last_ basic block in a function.  If that happens then any basic block that follows (lexically) the block with regin.end will not have scope info available.  LexicalScopeStack relies on processing basic block in CFG order, but this processing order is not guaranteed. Things get complicated when the optimizer gets a chance to optimizer IR with dbg intrinsics. 
Apply defensive patch to preserve at least one lexical scope till the end of function.

llvm-svn: 73282

llvm-svn: 73244

llvm-svn: 72948

llvm-svn: 72699

llvm-svn: 72604

llvm-svn: 72198

llvm-svn: 72197

llvm-svn: 72196

llvm-svn: 72195

llvm-svn: 72194

llvm-svn: 72193

the 'constract function dbg thingy'. Rename some methods to make them consistent
with the rest of the methods. Move the 'Emit' methods to the end of the file.

llvm-svn: 72192

llvm-svn: 72064

llvm-svn: 72057

function, this could be many, many times. We don't want to re-add variables to
that DIE for each time. We just want to add them once. Check to make sure that
we haven't added them already.

llvm-svn: 72047

Again, no intendtional functionality change.

llvm-svn: 71854