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

llvm-svn: 101575

This makes the local register allocator about 20% faster.

llvm-svn: 101574