it's too late to start backing off aggressive latency scheduling when most
  of the registers are in use so the threshold should be a bit tighter.
- Correctly handle live out's and extract_subreg etc.
- Enable register pressure aware scheduling by default for hybrid scheduler.
  For ARM, this is almost always a win on # of instructions. It's runtime
  neutral for most of the tests. But for some kernels with high register
  pressure it can be a huge win. e.g. 464.h264ref reduced number of spills by
  54 and sped up by 20%.

llvm-svn: 109279

ARM/PPC/MSP430-specific code (which are the only targets that
implement the hook) can directly reference their target-specific
instrinfo classes.

llvm-svn: 109171

This is probably not the best way to implement "Force LR to 
be spilled if the Thumb function size is > 2048." do this, 
it should use the branch shortening infrastructure, but I'm
just preserving functionality here.

llvm-svn: 109165

llvm-svn: 109125

llvm-svn: 109091

llvm-svn: 109090

especially on other platforms. Is there a better way to fix this.

llvm-svn: 109084

llvm-svn: 109081

Fix constant island pass's handling of tBR_JTr. The offset of the instruction does not have to be 4-byte aligned. Rather, it's the offset + 2 that must be aligned since the instruction expands into:
        mov     pc, r1
        .align  2
LJTI0_0_0:
        .long    LBB0_14

This fixes rdar://8213383. No test case since it's not possible to come up with a suitable small one.

llvm-svn: 109076

llvm-svn: 109064

rdar://8202967

llvm-svn: 109057

llvm-svn: 109047

llvm-svn: 109009

llvm-svn: 108991

llvm-svn: 108929

instruction selection to prefer it when possible. rdar://7903972

llvm-svn: 108844

llvm-svn: 108841

llvm-svn: 108812

llvm-svn: 108787

out of the AsmPrinter directory into libarm.  Now the
ARM InstPrinters depend jsut on the MC stuff, not on vmcore
or codegen.

llvm-svn: 108783

ARM has to provide its own TargetLowering::findRepresentativeClass because its scalar floating point registers alias its vector registers.

llvm-svn: 108761

it should set the jump table encloding the EK_Inline. This prevents
a second, unused, copy of the table from being emitted after the function
body. PR6581.

llvm-svn: 108730

llvm-svn: 108727

it should set the jump table encloding the EK_Inline. This prevents
a second, unused, copy of the table from being emitted after the function
body. PR7499.

llvm-svn: 108722

 - Unfortunate, but necessary for now to handle subtarget instruction matching. Eventually we should factor out the lower level target machine information so we don't need to do this.

llvm-svn: 108664

instruction for non-constant operands. This includes the case referenced
in the README.txt regarding a bitfield copy.

llvm-svn: 108608

llvm-svn: 108603

llvm-svn: 108601

llvm-svn: 108588

stack realignment on ARM.

Also check for function attributes as we do on X86 as well as
make explicit that we're checking can as well as needs in this function.

llvm-svn: 108582

and a combine pattern to use it for setting a bit-field to a constant
value. More to come for non-constant stores.

llvm-svn: 108570

llvm-svn: 108567

Thumb2ITBlockPass.

llvm-svn: 108564

thus is a much more meaningful name.

llvm-svn: 108563

-enable-no-nans-fp-math and -enable-no-infs-fp-math. All of the current codegen fp math optimizations only care whether the fp arithmetics arguments and results can never be NaN.

llvm-svn: 108465

llvm-svn: 108396

instructions use different values (e.g., 2-byte or 4-byte alignment).
Also fix ARMInstPrinter to print these alignments as bits instead of bytes.

llvm-svn: 108386

llvm-svn: 108366

in the literal field of an instruction. E.g.,
long long foo(long long a) {
  return a - 734439407618LL;
}

rdar://7038284

llvm-svn: 108339

Patch by Brian Lucas. PR7636.

llvm-svn: 108332