llvm-svn: 62306

llvm-svn: 62304

No functionality change.

llvm-svn: 62303

llvm-svn: 62302

For example, PIC16 needs to break a long or int constant into mulitple parts and emit multiple directives. So Allow targets to overried EmitConstantValueOnly().

llvm-svn: 62301

No functionality change.

llvm-svn: 62300

llvm-svn: 62299

llvm-svn: 62298

Clean up previous cast optimization a bit. Also make zext elimination a bit more aggressive: if it's not necessary to emit an AND (i.e. high bits are already zero), it's profitable to evaluate the operand at a different type.

llvm-svn: 62297

adding more information to the temporary variables names so that
they don't conflict.

llvm-svn: 62296

llvm-svn: 62295

llvm-svn: 62294

llvm-svn: 62292

a new toy hazard recognizier heuristic which attempts to direct the
scheduler to avoid clumping large groups of loads or stores too densely.

llvm-svn: 62291

Sema::ActOnFunctionDeclarator().  
No functionality change.  

llvm-svn: 62290

llvm-svn: 62289

llvm-svn: 62288

llvm-svn: 62287

Validate dbg_* intrinsics before lowering them.

llvm-svn: 62286

llvm-svn: 62285

to support MachineInstr-based scheduling in addition to
SDNode-based scheduling.

llvm-svn: 62284

loops, hoisting instructions all the way out in one step rather
than hoisting them one nest level at a time. Also, make a few
other code simplifications. This speeds up MachineLICM
by several fold.

llvm-svn: 62283

llvm-svn: 62282

llvm-svn: 62281

llvm-svn: 62279

init of static vars still not working. I'll get back to it tomorrow or so

llvm-svn: 62278

llvm-svn: 62277

llvm-svn: 62276

and into the ScheduleDAGInstrs class, so that they don't get
destructed and re-constructed for each block. This fixes a
compile-time hot spot in the post-pass scheduler.

To help facilitate this, tidy and do some minor reorganization
in the scheduler constructor functions.

llvm-svn: 62275

enum E {
 A = 1U,
 B
};

Don't make an implicit cast expr of null for B.

llvm-svn: 62274

- IdentifierInfo can now (optionally) have its string data not be
  co-located with itself.  This is for use with PTH.  This aspect is a
  little gross, as getName() and getLength() now make assumptions
  about a possible alternate representation of IdentifierInfo.
  Perhaps we should make IdentifierInfo have virtual methods?

IdentifierTable:
- Added class "IdentifierInfoLookup" that can be used by
  IdentifierTable to perform "string -> IdentifierInfo" lookups using
  an auxilliary data structure.  This is used by PTH.
- Perform tests show that IdentifierTable::get() does not slow down
  because of the extra check for the IdentiferInfoLookup object (the
  regular StringMap lookup does enough work to mitigate the impact of
  an extra null pointer check).
- The upshot is that now that some IdentifierInfo objects might be
  owned by the IdentiferInfoLookup object.  This should be reviewed.

PTH:
- Modified PTHManager::GetIdentifierInfo to *not* insert entries in
  IdentifierTable's string map, and instead create IdentifierInfo
  objects on the fly when mapping from persistent IDs to
  IdentifierInfos.  This saves a ton of work with string copies,
  hashing, and StringMap lookup and resizing.  This change was
  motivated because when processing source files in the PTH cache we
  don't need to do any string -> IdentifierInfo lookups.
- PTHManager now subclasses IdentifierInfoLookup, allowing clients of
  IdentifierTable to transparently use IdentifierInfo objects managed
  by the PTH file.  PTHManager resolves "string -> IdentifierInfo"
  queries by doing a binary search over a sorted table of identifier
  strings in the PTH file (the exact algorithm we use can be changed
  as needed).

These changes lead to the following performance changes when using PTH on Cocoa.h:
- fsyntax-only: 10% performance improvement
- Eonly: 30% performance improvement

llvm-svn: 62273

llvm-svn: 62272

this fixes PR3332

llvm-svn: 62271

and uninitialized use options.

llvm-svn: 62270

Use light weight DebugInfo object directly.

llvm-svn: 62269

llvm-svn: 62268

llvm-svn: 62267

previous commit.

llvm-svn: 62266

llvm-svn: 62265

llvm-svn: 62264