Add command line option to disable debug info printing in .s file. This option does not impact debug info generation and preservation through earlier compile starges.

llvm-svn: 102012

So far this is just a clone of -regalloc=local that has been lobotomized to run
25% faster. It drops the least-recently-used calculations, and is just plain
stupid when it runs out of registers.

The plan is to make this go even faster for -O0 by taking advantage of the short
live intervals in unoptimized code. It should not be necessary to calculate
liveness when most virtual registers are killed 2-3 instructions after they are
born.

llvm-svn: 102006

Identify when a lexical scope is split in to multiple instruction ranges. Emit such ranges using DW_AT_ranges.

llvm-svn: 102004

optimization for non-leaf functions. This will be hooked up to gcc's
-momit-leaf-frame-pointer option. rdar://7886181

llvm-svn: 101984

llvm-svn: 101977

llvm-svn: 101976

SelectionDAG directory and into a new Analysis.cpp file.

llvm-svn: 101975

  extract_subreg / insert_subreg, etc.
- Add support for more aggressive insert_subreg coalescing.

llvm-svn: 101971

llvm-svn: 101964

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