llvm-svn: 64582

Fix pr3571: If stride is a value defined by an instruction, make sure it dominates the loop preheader. When IV users are strength reduced, the stride is inserted into the preheader. It could create a use before def situation.

llvm-svn: 64579

llvm-svn: 64575

"system() declared with attribute warn_unused_result."

llvm-svn: 64574

llvm-svn: 64573

llvm-svn: 64555

Cleanup some warning.

Remark: when struct/class are declared differently than they are defined, this make problem for VC++ since it seems to mangle class differently that struct. These error are very hard to understand and find. So please, try to keep your definition/declaration in sync.

Only tested with VS2008. hope it does not break anything. feel free to revert.

llvm-svn: 64554

intrinsics to any IntrWriteArgMem intrinsics.

llvm-svn: 64551

llvm-svn: 64550

now that this no longer implies nocapture.

llvm-svn: 64540

taken advantage of anywhere.  Change the definition
of IntrWriteArgMem to no longer imply nocapture, and
explicitly add nocapture attributes everywhere (well,
not quite everywhere, because some of these intrinsics
did capture their arguments!).  Also, make clear that
the lack of other side-effects does not exclude doing
volatile loads or stores - the atomic intrinsics do
these, yet they are all marked IntrWriteArgMem (this
change is safe because nothing exploited it).

llvm-svn: 64539

llvm-svn: 64535

 - Test for signed and unsigned wrapping conditions, instead of just
   testing for non-negative induction ranges. 
 - Handle loops with GT comparisons, in addition to LT comparisons.
 - Support more cases of induction variables that don't start at 0.

llvm-svn: 64532

llvm-svn: 64531

No functionality change.

llvm-svn: 64530

llvm-svn: 64511

llvm-svn: 64496

printing getName(), so that unnamed values are printed correctly.

llvm-svn: 64468

about the code it describes, but at least now the comment
is right.

llvm-svn: 64465

being used for atomic intrinsics, it seems the
access may be volatile.  No code was exploiting
the original non-volatile definition, so only
the comment needs changing.

llvm-svn: 64464

it only reads memory!  The other change has no
functional effect, it just seems more logical to
go in order of decreasing knowledge.

llvm-svn: 64463

llvm-svn: 64460

mark the first argument nocapture if endptr=NULL for each particular call.

llvm-svn: 64453

link-time failures when building with optimization.  Just
get rid of them.

llvm-svn: 64449

llvm-svn: 64448

llvm-svn: 64444

Make sure the SCC pass manager initializes any contained
function pass managers.  Without this, simplify-libcalls
would add nocapture attributes when run on its own, but
not when run as part of -std-compile-opts or similar.

llvm-svn: 64443

couldn't ever be the return of call instruction. However, it's quite possible
that said local allocation is itself the return of a function call. That's
what malloc and calloc are for, actually.

llvm-svn: 64442

addrec in a different loop to check the value being added to
the accumulated Start value, not the Start value before it has
the new value added to it. This prevents LSR from going crazy
on the included testcase. Dale, please review.

llvm-svn: 64440

"I got blisters on my fingers."

llvm-svn: 64439

llvm-svn: 64438

There were some that might even matter in X86FastISel.

llvm-svn: 64437

llvm-svn: 64436

llvm-svn: 64435

llvm-svn: 64433

llvm-svn: 64432

llvm-svn: 64431

llvm-svn: 64430

llvm-svn: 64429

llvm-svn: 64428