llvm-svn: 75503

Add infrastructure to allow post instruction printing action triggers.
We'll eventually use this to print comments in asm files and do other
fun things.

This adds interfaces to the AsmPrinter and changes TableGen to invoke
the postInstructionAction when appropriate.  It also add parameters to
TargetAsmInfo to control comment layout.

llvm-svn: 75490

Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.

llvm-svn: 75379

and abort()/exit() -> llvm_report_error().

llvm-svn: 75363

llvm-svn: 74953

llvm-svn: 74949

 - This more or less amounts to a revert of r65379. I'm curious to know what
   happened that caused this variable to become unused.

llvm-svn: 74579

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: 74179

llvm-svn: 74137

llvm-svn: 74134

llvm-svn: 74132

llvm-svn: 74101

llvm-svn: 74097

a bunch of code from all the targets, and eliminates nondeterministic
ordering of directives being emitted in the output.

llvm-svn: 74096

llvm-svn: 74065

llvm-svn: 73784

llvm-svn: 73738

llvm-svn: 73736

On Darwin, ams printer should output a second label before a jump table so the linker knows it's a new atom. But this is only needed if the jump table is put in a separate section from the function body.

llvm-svn: 73720

llvm-svn: 73464

llvm-svn: 73457

llvm-svn: 73426

llvm-svn: 73362

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

bootstrapping.

llvm-svn: 72200

llvm-svn: 72198

llvm-svn: 72197

llvm-svn: 72196

llvm-svn: 72195

llvm-svn: 72194

llvm-svn: 72193