If the target prefers it, use _setjmp/_longjmp should be used instead of setjmp/longjmp for llvm.setjmp/llvm.longjmp.

llvm-svn: 23481

llvm-svn: 23480

and _setjmp/_longjmp should be used instead (for llvm.setjmp/llvm.longjmp).

llvm-svn: 23479

llvm-svn: 23478

is performed so it is only at most once per function that contains an invoke
instead of once per invoke in the function.  This patch has the following perks:

1. It fixes PR631, which complains about slowness.
2. If fixes PR240, which complains about non-volatile vars being live across
   setjmp/longjmps.
3. It improves (but does not fix) the jmpbuf alignment issue on itanium by not
   forcing the jmpbufs to always be 8-bytes off the alignment of the structure.
4. It speeds up 253.perlbmk from 338s to 13.70s (a 25x improvement!), making us
   now about 4% faster than GCC.

Further improvements are also possible.

llvm-svn: 23477

llvm-svn: 23476

llvm-svn: 23475

llvm-svn: 23474

llvm-svn: 23473

llvm-svn: 23472

llvm-svn: 23471

cross MBB pollution.

llvm-svn: 23470

llvm-svn: 23469

into the evaluator.  This shrinks a release build of instcombine's text
section from 216363 to 215975 bytes (on PPC).

llvm-svn: 23468

Split SimpleConstantVal up into its components, so each Constant subclass getsa different enum value.  This allows 'classof' for these to be really simple,not needing to call getType() anymore.

This speeds up isa/dyncast/etc for constants, and also makes them smaller.
For example, the text section of a release build of InstCombine.cpp shrinks
from 230037 bytes to 216363 bytes, a 6% reduction.

llvm-svn: 23467

a different enum value.  This allows 'classof' for these to be really simple,
not needing to call getType() anymore.

This speeds up isa/dyncast/etc for constants, and also makes them smaller.
For example, the text section of a release build of InstCombine.cpp shrinks
from 230037 bytes to 216363 bytes, a 6% reduction.

llvm-svn: 23466

ctor-list-opt.ll:CTOR8

llvm-svn: 23465

llvm-svn: 23464

potentially replaced at link-time.

llvm-svn: 23463

because gccas runs globalopt before inlining.

This implements ctor-list-opt.ll:CTOR7

llvm-svn: 23462

the initialization

llvm-svn: 23461

llvm-svn: 23460

eh lowering as well.

llvm-svn: 23459

llvm-svn: 23458

llvm-svn: 23457

which is not stable.

llvm-svn: 23456

for testing and will require target machine info to do a proper scheduling.
The simple scheduler can be turned on using -sched=simple (defaults
to -sched=none)

llvm-svn: 23455

llvm-svn: 23454

llvm-svn: 23453

llvm-svn: 23452

llvm-svn: 23451

llvm-svn: 23450

ctor-list-opt.ll:CTOR5.

llvm-svn: 23449

llvm-svn: 23448

llvm-svn: 23447

ConstantFoldLoadThroughGEPConstantExpr function in the utils lib.

llvm-svn: 23446

as ConstantFoldLoadThroughGEPConstantExpr.

llvm-svn: 23445

pass.

llvm-svn: 23444

llvm-svn: 23443

llvm-svn: 23442