CodeGen's ComputeMaskedBits was being over-conservative when computing
bits for an ADD.

llvm-svn: 101963

user-defined operations that use MMX register types, but
the compiler shouldn't generate them on its own.  This adds
a Synthesizable abstraction to represent this, and changes
the vector widening computation so it won't produce MMX types.
(The motivation is to remove noise from the ABI compatibility
part of the gcc test suite, which has some breakage right now.)

llvm-svn: 101951

register is not killed in the loop.

This fixes 188.ammp on ARM where the post-ra scheduler would grab a register
that looked available but wasn't.

A testcase would be huge and fragile, sorry.

llvm-svn: 101930

llvm-svn: 101914

into SelectionDAGBuilder. This avoids a separate pass over the
instructions, and has the side effect of providing debug location
information to the copy.

llvm-svn: 101906

they end up doing nothing.

llvm-svn: 101904

llvm-svn: 101902

llvm-svn: 101901

llvm-svn: 101900

llvm-svn: 101899

in other types.  fix this by only bumping zero-byte globals
up to a single byte if the *entire global* is zero size,
fixing PR6340.

This also fixes empty arrays etc to be handled correctly,
and only does this on subsection-via-symbols targets (aka
darwin) which is the only place where this matters.

llvm-svn: 101879

llvm-svn: 101860

it as it's not dead.

llvm-svn: 101855

in the case where a basic block is split.

llvm-svn: 101850

SelectionDAGBuilder, where it doesn't have to be as complicated.

llvm-svn: 101848

responsible for figuring out what that's supposed to be on its own.

llvm-svn: 101844

where multiple blocks are emitted; functions which do this need to return
the new BB so that their callers can stay current.

llvm-svn: 101843

llvm-svn: 101832

and End arguments by-value rather than by-reference.

llvm-svn: 101830

an argument to things that need it.

llvm-svn: 101825

need it, just pass around the parent block of the current instruction
explicitly.

llvm-svn: 101822

llvm-svn: 101808

fetch one from the MachineFunction.

llvm-svn: 101807

llvm-svn: 101806

llvm-svn: 101805

than just getting one through a TargetLowering.

llvm-svn: 101802

SelectionDAG-specific.

llvm-svn: 101801

llvm-svn: 101655

llvm-svn: 101640

llvm-svn: 101639

llvm-svn: 101638

llvm-svn: 101637

const_casts, and it reinforces the design of the Target classes being
immutable.

SelectionDAGISel::IsLegalToFold is now a static member function, because
PIC16 uses it in an unconventional way. There is more room for API
cleanup here.

And PIC16's AsmPrinter no longer uses TargetLowering.

llvm-svn: 101635

the live-in sets of BBs in the loop. Otherwise later pass may end up using the
registers and override the invariant. rdar://7852937
No reasonablly sized test case possible.

llvm-svn: 101626

llvm-svn: 101622

llvm-svn: 101621

llvm-svn: 101620

just remove them all.  Radar 7873207 (working around the root problem of
Radar 7759363).

llvm-svn: 101604

Revert "Use a simpler data structure to calculate the least recently used register in RegAllocLocal."

This reverts commit 101392. It broke a buildbot.

llvm-svn: 101595

Probably the best way to know that all getOperand() calls have been handled
is to replace that API instead of updating.

llvm-svn: 101579