I accidentally removed this check in an earlier commit, which cause breakage in the pre alloc splitter.

llvm-svn: 62678

- Ensure that (operation) legalization emits proper FDIV libcall when needed.
- Fix various bugs encountered during llvm-spu-gcc build, along with various
  cleanups.
- Start supporting double precision comparisons for remaining libgcc2 build.
  Discovered interesting DAGCombiner feature, which is currently solved via
  custom lowering (64-bit constants are not legal on CellSPU, but DAGCombiner
  insists on inserting one anyway.)
- Update README.

llvm-svn: 62664

Allow targets to legalize operations (with illegal operands) that produces multiple values. For example, a load with an illegal operand (a load produces two values, a value and chain).

llvm-svn: 62663

llvm-svn: 62639

llvm-svn: 62638

llvm-svn: 62625

Fix PR3243: a LiveVariables bug. When HandlePhysRegKill is checking whether the last reference is also the last def (i.e. dead def), it should also check if last reference is the current machine instruction being processed. This can happen when it is processing a physical register use and setting the current machine instruction as sub-register's last ref.

llvm-svn: 62617

causing the limited precision stuff to produce the wrong result for values in
the range [0, 1).

llvm-svn: 62615

llvm-svn: 62610

llvm-svn: 62602

llvm-svn: 62600

llvm-svn: 62596

llvm-svn: 62594

llvm-svn: 62589

llvm-svn: 62573

llvm-svn: 62571

as its comment says, even in the case where it will be generating
extending loads. This fixes PR3216.

llvm-svn: 62557

Do not use DenseMap because the iterator is invalidated while constructing types. After all there was a reason why std::map was used initially!

llvm-svn: 62555

llvm-svn: 62547

llvm-svn: 62545

SDNode subclasses to keep state that requires non-trivial
destructors, however it was already effectively impossible,
since the destructor isn't actually ever called. There currently
aren't any SDNode subclasses affected by this, and in general
it's desireable to keep SDNode objects light-weight.

This eliminates the last virtual member function in the SDNode
class, so it eliminates the need for a vtable pointer, making
SDNode smaller.

llvm-svn: 62539

uses are added to the From node while it is processing From's
use list, because of automatic local CSE. The fix is to avoid
visiting any new uses.

Fix a few places in the DAGCombiner that assumed that after
a RAUW call, the From node has no users and may be deleted.

This fixes PR3018.

llvm-svn: 62533

llvm-svn: 62467

llvm-svn: 62459

Remove tabs.

llvm-svn: 62423

llvm-svn: 62421

llvm-svn: 62412

llvm-svn: 62410

llvm-svn: 62406

llvm-svn: 62383

and every other instruction in their blocks to keep the terminator
instructions at the end, teach the post-RA scheduler how to operate
on ranges of instructions, and exclude terminators from the range
of instructions that get scheduled.

Also, exclude mid-block labels, such as EH_LABEL instructions, and
schedule code before them separately from code after them. This
fixes problems with the post-RA scheduler moving code past
EH_LABELs.

llvm-svn: 62366

to 0, to ensure that the subsequent code doesn't try to break the
dependence.

llvm-svn: 62365

member directly, which is private as of r55504.

llvm-svn: 62364

array instead, since this is what the scheduler actually cares about.
And remove a check that is unnecessary, since it can assume that
SUnits isn't empty.

llvm-svn: 62362

llvm-svn: 62359

llvm-svn: 62358

CreateVirtualRegisters does trivial copy coalescing. If a node def is used by a single CopyToReg, it reuses the virtual register assigned to the CopyToReg. This won't work for SDNode that is a clone or is itself cloned. Disable this optimization for those nodes or it can end up with non-SSA machine instructions.

llvm-svn: 62356

llvm-svn: 62341

llvm-svn: 62328

warning.

llvm-svn: 62327