The rewriter works almost identically to -rewriter=trivial, except it also
eliminates any identity copies.

This makes the new register allocators independent of VirtRegRewriter.cpp which
will be going away at the same time as RegAllocLinearScan.

llvm-svn: 125967

Add FixedLenDecoderEmitter, the skeleton of a new disassembler emitter for fixed-length instruction encodings.
A major part of its (eventual) goal is to support a much cleaner separation between disassembly callbacks
provided by the target and the disassembler emitter itself, i.e. not requiring hardcoding of knowledge in tblgen
like the existing disassembly emitters do.

The hope is that some day this will allow us to replace the existing non-Thumb ARM disassembler and remove
some of the hacks the old one introduced to tblgen.

llvm-svn: 125966

query about available library functions.  For now this just has 
memset_pattern16, which exists on darwin, but it can be extended for a 
bunch of other things in the future.

llvm-svn: 125965

llvm-svn: 125964

llvm-svn: 125963

llvm-svn: 125962

Plus add a helper method ReadCoreReg(uint32_t regnum, bool *success) to simplify
coding a bit.

llvm-svn: 125961

llvm-svn: 125960

Add code to emulate LDRB (immediate, Thumb) instruction.

llvm-svn: 125959

llvm-svn: 125958

No functionality change.

llvm-svn: 125957

parallel with the rest of the tools directory as it depends on Clang.

llvm-svn: 125956

llvm-svn: 125949

testcases for the disassembler to make sure it still works for "msr".

llvm-svn: 125948

Plus add macro definitions for APSR_C and APSR_V to simplify code.

llvm-svn: 125947

scalar types. // rdar://7761305

llvm-svn: 125946

Add code to emulate LDR (register) Arm instruction.

llvm-svn: 125945

patch by Amit Kulkarni!

llvm-svn: 125944

llvm-svn: 125943

llvm-svn: 125845

overflow.  These subsume some existing equality transforms, so zap those.

llvm-svn: 125843

llvm-svn: 125842

TCE target has some too strict alignment rules (that the HW really does not require, but which caused problems elsewhere) for data types and an ABI change was decided.

llvm-svn: 125833

llvm-svn: 125832

llvm-svn: 125831

llvm-svn: 125830

taken (and used!).  This prevents merging the blocks (invalidating
the block addresses) in a case like this:

#define _THIS_IP_  ({ __label__ __here; __here: (unsigned long)&&__here; })

void foo() {
  printf("%p\n", _THIS_IP_);
  printf("%p\n", _THIS_IP_);
  printf("%p\n", _THIS_IP_);
}

which fixes PR4151.

llvm-svn: 125829

llvm-svn: 125828

This is part of a futile attempt to not "break" bizzaro
code like this:

 l1:
  printf("l1: %p\n", &&l1);
  ++x;

  if( x < 3 ) goto l1;


Previously we'd fold &&l1 to 1, which is fine per our semantics
but not helpful to the user.

llvm-svn: 125827

llvm-svn: 125826

a scoped enumeration type to an integral or floating type,
properly. There was an over-eager assertion, and it was missing the
floating-point case.

Fixes PR9107/<rdar://problem/8937402>. 

llvm-svn: 125825

llvm-svn: 125824

_Block_object_* flags;  it's just BLOCK_HAS_COPY_DISPOSE or not.

Also, we don't need to chase forwarding pointers prior to calling
_Block_object_dispose;  _Block_object_dispose in fact already does
this.

rdar://problem/9006315

llvm-svn: 125823

or union, place the qualifier on the outermost member reference
expression, which actually contains the entity name.

Fixes PR9188/<rdar://problem/8990184>.

llvm-svn: 125822

llvm-svn: 125821

This removes the final dependency edge from any lib outside of CodeGen
to core.  As a result we can, and do, trim the dependency on core
from libclang, PrintFunctionNames, the unit tests and c-index-test.
While at it, review and trim other unneeded dependencies.

llvm-svn: 125820

llvm-svn: 125819

enumeration type, we were generating an integer literal implicitly
casted to the appropriate enumeration type. However, later checks on
that expression would strip the implicit cast.

This commit tweaks the lame hack, by creating an explicit cast instead
of an implicit cast. The right answer is to introduce a 
SubstNonTypeTemplateParmExpr expression that acts like the substituted
result. I'll investigate that soon.

llvm-svn: 125818

bugs from other clients that don't expect to see a LabelDecl in a DeclStmt,
but if so they should be easy to fix.

This implements most of PR3429 and rdar://8287027

llvm-svn: 125817

llvm-svn: 125816