change it to sint_to_fp on targets where that is cheaper (and
visaversa of course).  This allows us to compile uint_to_fp to:

_test:
	movl	4(%esp), %eax
	shrl	$23, %eax
	cvtsi2ss	%eax, %xmm0
	movl	8(%esp), %eax
	movss	%xmm0, (%eax)
	ret

instead of:

	.align	3
LCPI1_0:					##  double
	.long	0	## double least significant word 4.5036e+15
	.long	1127219200	## double most significant word 4.5036e+15
	.text
	.align	4,0x90
	.globl	_test
_test:
	subl	$12, %esp
	movl	16(%esp), %eax
	shrl	$23, %eax
	movl	%eax, (%esp)
	movl	$1127219200, 4(%esp)
	movsd	(%esp), %xmm0
	subsd	LCPI1_0, %xmm0
	cvtsd2ss	%xmm0, %xmm0
	movl	20(%esp), %eax
	movss	%xmm0, (%eax)
	addl	$12, %esp
	ret

llvm-svn: 52747

Remember which MachineOperand we were processing, so we don't have to scan the list to find it again later.
This speeds up live intervals from 0.37s to 0.30s on instcombine.

llvm-svn: 52745

llvm-svn: 52744

  shift.
- Add a readme entry for a missing vector_shuffle optimization that results in
  awful codegen.

llvm-svn: 52740

For this it is convenient to permit floats to
be used with EXTRACT_ELEMENT, so I tweaked
things to allow that.  I also added libcalls
for ppcf128 to i32 forms of FP_TO_XINT, since
they exist in libgcc and this case can certainly
occur (and does occur in the testsuite) - before
the i64 libcall was being used.  Also, the
XINT_TO_FP result seemed to be wrong when
the argument is an i128: the wrong fudge
factor was added (the i32 and i64 cases were
handled directly, but the i128 code fell
through to some generic softening code which
seemed to think it was i64 to f32!).  So I
fixed it by adding a fudge factor that I
found in my breakfast cereal.

llvm-svn: 52739

llvm-svn: 52738

llvm-svn: 52736

InvalidateInstructionCache method instead of calling through
a hook on the JIT.  This is a host feature, not a target feature.

llvm-svn: 52734

llvm-svn: 52733

llvm-svn: 52731

them back to registers!

llvm-svn: 52729

llvm-svn: 52728

llvm-svn: 52727

llvm-svn: 52726

llvm-svn: 52725

select_cc and friends.  This code could be
factorized a bit but I'm not sure that it's
worth it.

llvm-svn: 52724

llvm-svn: 52723

the base SDNode's VTList.

llvm-svn: 52722

Nathan Keynes!

llvm-svn: 52721

Added abstract class MemSDNode for any Node that have an associated MemOperand
Changed atomic.lcs => atomic.cmp.swap, atomic.las => atomic.load.add, and
atomic.lss => atomic.load.sub

llvm-svn: 52706

llvm-svn: 52705

llvm-svn: 52704

- Avoid speculatively execute vector ops.

llvm-svn: 52703

llvm-svn: 52702

llvm-svn: 52701

Use push_back rather than operator[], which is incorrect in this cases. Unfortunately, this slow the testcase down a little bit,
but only marginally.

llvm-svn: 52700

llvm-svn: 52699

of after, so that any reallocation it does doesn't get counted for the pass
being timed.  This probably doesn't account for a timing discrepancy I was
looking into, but I'm fixing it anyway.

llvm-svn: 52693

test (doesn't work for any MMX vector types, it's
not me).  Rewritten to use v2i16 which is generic
and going to stay that way; I think that preserves
the point of the test.

llvm-svn: 52692

load,store,call,return,bitcast.  This is enough to
make call and return work.

llvm-svn: 52691

In ConstantArray::getAsString(), we know the size of the resultant string in advance so we can pre-allocate it and just fill in
the entries.  This improves the time for the AsmPrinter on InstructionCombining.cpp from 0.4248s to 0.3370s.

llvm-svn: 52690

llvm-svn: 52689

llvm-svn: 52688

llvm-svn: 52687

static_cast instead of reinterpret_cast.

llvm-svn: 52686

llvm-svn: 52685

llvm-svn: 52684

llvm-svn: 52683

polution problems from system headers.  Patch by Nathan Keynes!

llvm-svn: 52682

llvm-svn: 52678