llvm-svn: 120506

legalization time. Since at legalization time there is no mapping from
SDNode back to the corresponding LLVM instruction and the return
SDNode is target specific, this requires a target hook to check for
eligibility. Only x86 and ARM support this form of sibcall optimization
right now.
rdar://8707777

llvm-svn: 120501

llvm-svn: 120498

llvm-svn: 120493

llvm-svn: 120492

may-aliasing stores that partially overlap with different base
pointers.  This implements PR6043 and the non-variable part of
PR8657

llvm-svn: 120485

now that DSE hacks on them.  This fixes a regression I introduced,
by generalizing DSE to hack on transfers.

llvm-svn: 120445

llvm-svn: 120436

llvm-svn: 120423

llvm-svn: 120418

certainly be made more generic. But it does allow us to parse something like:

          ldr     r3, [r2, r4]

correctly in Thumb mode.

llvm-svn: 120408

about pairs of AA::Location's instead of looking for MemDep's
"Def" predicate.  This is more powerful and general, handling
memset/memcpy/store all uniformly, and implementing PR8701 and
probably obsoleting parts of memcpyoptimizer.

This also fixes an obscure bug with init.trampoline and i8
stores, but I'm not surprised it hasn't been hit yet.  Enhancing
init.trampoline to carry the size that it stores would allow
DSE to be much more aggressive about optimizing them.

llvm-svn: 120406

Fixes PR8573.

llvm-svn: 120404

llvm-svn: 120398

llvm-svn: 120394

llvm-svn: 120393

llvm-svn: 120383

llvm-svn: 120375

Merge context-sensitive.ll -> simple.ll and upgrade it.

llvm-svn: 120374

merging more into other larger .ll files, filecheckizing along the way.

llvm-svn: 120373

queried location doesn't overlap the source, and add a testcase.

llvm-svn: 120370

contains "ref".

Enhance DSE to use a modref query instead of a store-specific hack
to generalize the "ignore may-alias stores" optimization to handle
memset and memcpy.

llvm-svn: 120368

llvm-svn: 120364

stores, fix and add a testcase.

llvm-svn: 120363

The encoding for alignment in VLD4-dup instructions is still a work in progress.

llvm-svn: 120356

llvm-svn: 120340

assignment instructions from being moved below / above calls.
rdar://8690640

llvm-svn: 120339

llvm-svn: 120336

llvm-svn: 120332

llvm-svn: 120325

Transform (extractvalue (load P), ...) to (load (gep P, 0, ...)) if the load has no other uses, shrinking the load.

llvm-svn: 120323

Update this test to keep testing the -instcombine transform it's supposed to be testing instead of triggering the improved constant folding for insertvalue and extractvalue.

llvm-svn: 120319

llvm-svn: 120316

llvm-svn: 120312

shiftamount > 7.

llvm-svn: 120288

This speeds up selected test cases with up to
5% - no slowdowns observed.

llvm-svn: 120286

%llvmshlibdir should be 'bin' on Cygming.

llvm-svn: 120282

llvm-svn: 120279

llvm-svn: 120278

llvm-svn: 120277