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: 77293

llvm-svn: 77292

to a few tests where it is required for the expected transformation.

llvm-svn: 77290

llvm-svn: 77289

llvm-svn: 77287

llvm-svn: 77286

point where SI can get deleted. This fixes a use of free'd memory.
This fixes Externals/Povray.

llvm-svn: 77285

llvm-svn: 77275

if there are no other uses.  If people don't need this routine
anymore, if should be deleted.

llvm-svn: 77274

to match llvm-ld's default behavior.

llvm-svn: 77273

llvm-svn: 77272

llvm-svn: 77271

llvm-svn: 77269

llvm-svn: 77266

llvm-svn: 77262

llvm-svn: 77261

llvm-svn: 77260

LangRef.html changes for details.

llvm-svn: 77259

 - My DFS traversal of LLVM is, at least for now, nearly complete! :)

llvm-svn: 77258

llvm-svn: 77257

llvm-svn: 77256

it conforms to the assertion added in r77245. This fixes a failure
in qa_override.c in clang's testsuite.

llvm-svn: 77255

MCSections soon instead of Section for all targets, and we need something to
own them.

llvm-svn: 77252

llvm-svn: 77251

llvm-svn: 77250

llvm-svn: 77247

that the subclass hasn't left any pending data in the buffer.

llvm-svn: 77245

llvm-svn: 77244

llvm-svn: 77243

Remove TPat. No patterns depend on just isThumb(). Must use either T1Pat (isThumb1Only()) or T2Pat (is Thumb2).

llvm-svn: 77242

llvm-svn: 77240

llvm-svn: 77239

llvm-svn: 77238

implementations that need it, rearrange ELFTAI.

llvm-svn: 77236

llvm-svn: 77233

llvm-svn: 77232

llvm-svn: 77231

convertToThreeAddress can't handle Thumb2 instructions (which don't have same address mode as ARM instructions).

llvm-svn: 77230

llvm-svn: 77229