In some cases such as interpreters using indirectbr, the CFG can be very
complicated, and live range splitting may be forced to insert a large
number of phi-defs.  When that happens, traceSiblingValue can spend a
lot of time zipping around in the CFG looking for defs and reloads.

This patch causes more information to be cached in SibValues, and the
cached values are used to terminate searches early.  This speeds up
spilling by 20x in one interpreter test case.  For more typical code,
this is just a 10% speedup of spilling.

llvm-svn: 139247

Fix atomic load and store on x86 to pass -verify-machineinstrs (and possibly fix some subtle bugs involving passes which check mayStore()).

This isn't exactly ideal, but it is good enough for the moment.

llvm-svn: 139245

llvm-svn: 139244

There is no 16-bit wide encoding, so the .w suffix isn't needed (indeed, isn't
documented as allowed). Also add the missing '!' token on the _UPD
variant.

llvm-svn: 139243

Choose 32-bit vs. 16-bit encoding when there's no .w suffix in post-processing
as match classes are insufficient to handle the context-sensitiveness of
the writeback operand's legality for the 16-bit encodings.

llvm-svn: 139242

llvm-svn: 139240

Refactor instprinter and mcdisassembler to take a SubtargetInfo. Add -mattr= handling to llvm-mc. Reviewed by Owen Anderson.

llvm-svn: 139237

duplicate tests are eliminated (for example if the two functions both have
a catch clause catching the same type, ensure the redundant one is removed).
Note that it would probably be safe to say that eh.typeid.for is 'const',
but since two calls to it with the same argument can give different results
(but only if the calls are in different functions), it seems more correct to
mark it only 'pure'; this doesn't get in the way of the optimization.

llvm-svn: 139236

Handle explicit 'ia' suffix via a MnemonicAlias (pre-existing).

llvm-svn: 139234

(not assert) early.

llvm-svn: 139233

llvm-svn: 139232

llvm-svn: 139230

llvm-svn: 139229

Relax the MemOperands on atomics a bit.  Fixes -verify-machineinstrs failures for atomic laod/store on ARM.

(The fix for the related failures on x86 is going to be nastier because we actually need Acquire memoperands attached to the atomic load instrs, etc.)

llvm-svn: 139221

name.

llvm-svn: 139220

While sinking machine instructions, sink matching DBG_VALUEs also otherwise live debug variable pass will drop DBG_VALUEs on the floor.

llvm-svn: 139208

information for older linkers.

llvm-svn: 139206

llvm-svn: 139205

Fixes PR10872 and <rdar://problem/10065079>.

llvm-svn: 139204

llvm-svn: 139202

llvm-svn: 139200

llvm-svn: 139199

llvm-svn: 139194

llvm-svn: 139193

these tests all infinitely recurse, bringing my system down into swapping hell.

llvm-svn: 139192

llvm-svn: 139191

llvm-svn: 139188

handle anything more complex. Fixes PR10383 again!

llvm-svn: 139186

llvm-svn: 139179

llvm-svn: 139177

llvm-svn: 139172

llvm-svn: 139171

llvm-svn: 139169

llvm-svn: 139168

llvm-svn: 139161

with a vector condition); such selects become VSELECT codegen nodes.
This patch also removes VSETCC codegen nodes, unifying them with SETCC
nodes (codegen was actually often using SETCC for vector SETCC already).
This ensures that various DAG combiner optimizations kick in for vector
comparisons.  Passes dragonegg bootstrap with no testsuite regressions
(nightly testsuite as well as "make check-all").  Patch mostly by
Nadav Rotem.

llvm-svn: 139159

Now the 'S' instructions, e.g. ADDS, treat S bit as optional operand as well.
Also fix isel hook to correctly set the optional operand.
rdar://10073745

llvm-svn: 139157

llvm-svn: 139156

Even if there's no mode switch performed, the .code directive should still
be sent to the output streamer. Otherwise, for example, an output asm stream
is not equivalent to the input stream which generated it (a dependency on
the input target triple arm vs. thumb is introduced which was not originally
there).

llvm-svn: 139155

llvm-svn: 139154