llvm-svn: 77516

 - Call RAUW to delete all instructions (this is a patch from Nick Lewycky).

llvm-svn: 77512

llvm-svn: 77494

into a new BB that has no predecessors.

llvm-svn: 77433

llvm-svn: 77366

llvm-svn: 77347

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

llvm-svn: 77290

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: 77271

llvm-svn: 77247

llvm-svn: 77152

llvm-svn: 77148

llvm-svn: 77145

Also, change MDString to use a StringRef.

llvm-svn: 77098

 - The only meat here is in Value.{h,cpp} the rest is essential 'const
   std::string &' -> 'const Twine &'.

llvm-svn: 77048

llvm-svn: 77045

llvm-svn: 77044

llvm-svn: 77039

llvm-svn: 77033

getAnalysisIfAvailable<TargetData>().

llvm-svn: 77028

 - Some clients which used DOUT have moved to DEBUG. We are deprecating the
   "magic" DOUT behavior which avoided calling printing functions when the
   statement was disabled. In addition to being unnecessary magic, it had the
   downside of leaving code in -Asserts builds, and of hiding potentially
   unnecessary computations.

llvm-svn: 77019

Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types.  More to come.

llvm-svn: 77011

llvm-svn: 76988

instead of getAnalysis<TargetData>().

llvm-svn: 76982

 - Yay for '-'s and simplifications!

 - I kept StringMap::GetOrCreateValue for compatibility purposes, this can
   eventually go away. Likewise the StringMapEntry Create functions still follow
   the old style.

 - NIFC.

llvm-svn: 76888

simplify it.

llvm-svn: 76866

also apply to vectors.  This allows us to compile this:

#include <emmintrin.h>
__m128i a(__m128 a, __m128 b) { return a==a & b==b; }
__m128i b(__m128 a, __m128 b) { return a!=a | b!=b; }

to:

_a:
	cmpordps	%xmm1, %xmm0
	ret
_b:
	cmpunordps	%xmm1, %xmm0
	ret

with clang instead of to a ton of horrible code.

llvm-svn: 76863

no functionality change.

llvm-svn: 76859

llvm-svn: 76702

getAnalysisIfAvailable<TargetData>.

llvm-svn: 76676

llvm-svn: 76598

llvm-svn: 76533

llvm-svn: 76442

Getelementptrs that are defined to wrap are virtually useless to
optimization, and getelementptrs that are undefined on any kind
of overflow are too restrictive -- it's difficult to ensure that
all intermediate addresses are within bounds. I'm going to take
a different approach.

Remove a few optimizations that depended on this flag.

llvm-svn: 76437

insertelement/extractelement.

I'm not entirely sure this is precisely what we want to do: should we 
prefer bitcast(insertelement) or insertelement(bitcast)?  Similarly. should we 
prefer extractelement(bitcast) or bitcast(extractelement)?

llvm-svn: 76345

way (bitcast -> insert/extractelement).

llvm-svn: 76325

sign bit set.

llvm-svn: 76304

llvm-svn: 76302

llvm-svn: 76301