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

llvm-svn: 62678

Also a few signed comparison fixes.

llvm-svn: 62665

- 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

unsigned test(unsigned a) {
  return ~a;
}
llvm used to generate:
movl    $4294967295, %eax
xorl    4(%esp), %eax

Now it generates:
movl      4(%esp), %eax
notl      %eax

It's 3 bytes shorter.

llvm-svn: 62661

Besides APFloat, this involved removing code
from two places that thought they knew the
result of frem(0., x) but were wrong.

llvm-svn: 62645

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

llvm-svn: 62616

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

fully implemented yet and not used.  This is
mainly to clarify that APFloat::mod implements
C fmod, not remainder.

llvm-svn: 62593

Patrick Boettcher!

llvm-svn: 62592

llvm-svn: 62590

llvm-svn: 62589

llvm-svn: 62573

llvm-svn: 62571

llvm-svn: 62561

llvm-svn: 62558

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

This requires a rebuild of 'configure' itself. I will be committing that next, but
built with the wrong version of autoconf. Somebody who has the right one, please update
it.

As a side-note, because of the way autoconf works, all built tools will link against
libffi, not just lli. If you know how to fix this, please let me know ...

llvm-svn: 62553

llvm-svn: 62547

llvm-svn: 62546

llvm-svn: 62545

trapping instruction be executed unconditionally.

llvm-svn: 62541

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

llvm-svn: 62535

langref.  Constant fold them to undef instead of trying to preserve
the trap.  This fixes PR3354.

llvm-svn: 62534

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: 62529

llvm-svn: 62528

llvm-svn: 62526

DIVREM isel deficiency: If sign bit is known zero, zero out DX/EDX/RDX instead of sign extending the low part (in AX/EAX/RAX) into it.

llvm-svn: 62519