getAnalysisIfAvailable<TargetData>.

llvm-svn: 76676

llvm-svn: 76598

llvm-svn: 76595

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

doesn't cause ".no_dead_strip" to be emitted on darwin.

llvm-svn: 76399

"private" symbols which the assember shouldn't strip, but which the linker may
remove after evaluation. This is mostly useful for Objective-C metadata.

This is plumbing, so we don't have a use of it yet. More to come, etc.

llvm-svn: 76385

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

llvm-svn: 76324

sign bit set.

llvm-svn: 76304

llvm-svn: 76302

llvm-svn: 76301

bitcasts.

It would also be possible to canonicalize the other way; does anyone 
have a preference?

llvm-svn: 76300

where int is 32 bits.

llvm-svn: 76293

all values belonging to the intersection will belong to the resulting range.
The former was inconsistent about that point (either way is fine, just pick
one.) This is part of PR4545.

llvm-svn: 76289

which cannot be folded even if they have constant operands. Significantly
helps if_spppsubr.c attached to PR4573.

llvm-svn: 76285

llvm-svn: 76284

ConstantExpr and Instruction. This involves duplicating some code
between GetElementPtrInst and GEPOperator, but it's not a lot.

llvm-svn: 76265

GEPOperator's hasNoPointer0verflow(), and make a few places in instcombine
that create GEPs that may overflow clear the NoOverflow value. Among
other things, this partially addresses PR2831.

llvm-svn: 76252

llvm-svn: 76249

in a convenient manner, factoring out some common code from
InstructionCombining and ValueTracking. Move the contents of
BinaryOperators.h into Operator.h and use Operator to generalize them
to support ConstantExprs as well as Instructions.

llvm-svn: 76232

llvm-svn: 76184

isSafeToSpeculativelyExecute. The new method is a bit closer to what 
the callers actually care about in that it rejects more things callers 
don't want.  It also adds more precise handling for integer 
division, and unifies code for analyzing the legality of a speculative 
load.

llvm-svn: 76150

our current context-passing stuff, which is also fixed here

llvm-svn: 76089

llvm-svn: 75863

using it.

llvm-svn: 75852

operands; it's possible to end up with a constant-foldable operand to 
most instructions, even those which can't trap.

llvm-svn: 75845

llvm-svn: 75723

and use this to simplify more code.

llvm-svn: 75722

llvm-svn: 75703

llvm-svn: 75642

This adds location info for all llvm_unreachable calls (which is a macro now) in
!NDEBUG builds.
In NDEBUG builds location info and the message is off (it only prints
"UREACHABLE executed").

llvm-svn: 75640

This results in the pass manager running IVUsers only once for
indvars, instead of twice.

llvm-svn: 75633

llvm-svn: 75586

function.

llvm-svn: 75584

block has a single unique exiting block.

llvm-svn: 75579

xor R, R is a common and valid idiom for zeroing a register, for example.

llvm-svn: 75571

llvm-svn: 75539