llvm-svn: 47149

llvm-svn: 47148

it follows the order of the enum, not alphabetical.
The motivation is to make -mattr=+ssse3,+sse41
select SSE41 as it ought to.  Added "ignored"
enum values of 0 to PPC and SPU to avoid compiler
warnings.

llvm-svn: 47143

Fixes PR 2030.

llvm-svn: 47141

being consistent with the rest of the APInt implementation.

llvm-svn: 47138

llvm-svn: 47129

llvm-svn: 47128

which allows us to kill a target-specific node.

llvm-svn: 47127

the return value is zero-extended if it isn't
sign-extended.  It may also be any-extended.
Also, if a floating point value was returned
in a larger floating point type, pass 1 as the
second operand to FP_ROUND, which tells it
that all the precision is in the original type.
I think this is right but I could be wrong.
Finally, when doing libcalls, set isZExt on
a parameter if it is "unsigned".  Currently
isSExt is set when signed, and nothing is
set otherwise.  This should be right for all
calls to standard library routines.

llvm-svn: 47122

1) ConstantFP is now expand by default
2) ConstantFP is not turned into TargetConstantFP during Legalize
   if it is legal.

This allows ConstantFP to be handled like Constant, allowing for 
targets that can encode FP immediates as MachineOperands.

As a bonus, fix up Itanium FP constants, which now correctly match,
and match more constants!  Hooray.

llvm-svn: 47121

FP Immediates, crazily enough

llvm-svn: 47117

llvm-svn: 47116

llvm-svn: 47115

llvm-svn: 47111

llvm-svn: 47109

llvm-svn: 47108

llvm-svn: 47107

llvm-svn: 47106

llvm-svn: 47101

size. Initialize these APInts to properly-sized zero values.

llvm-svn: 47099

llvm-svn: 47098

to pass the mask APInt by value, not by reference. 

llvm-svn: 47096

llvm-svn: 47093

actually does.

llvm-svn: 47090

llvm-svn: 47089

llvm-svn: 47086

llvm-svn: 47082

llvm-svn: 47079

CTTZ and CTPOP.  The expansion code differs from
that in LegalizeDAG in that it chooses to take the
CTLZ/CTTZ count from the Hi/Lo part depending on
whether the Hi/Lo value is zero, not on whether
CTLZ/CTTZ of Hi/Lo returned 32 (or whatever the
width of the type is) for it.  I made this change
because the optimizers may well know that Hi/Lo
is zero and exploit it.  The promotion code for
CTTZ also differs from that in LegalizeDAG: it
uses an "or" to get the right result when the
original value is zero, rather than using a compare
and select.  This also means the value doesn't
need to be zero extended.

llvm-svn: 47075

llvm-svn: 47067

llvm-svn: 47066

llvm-svn: 47065

llvm-svn: 47062

llvm-svn: 47061

llvm-svn: 47060

llvm-svn: 47058

Fix a potential serious problem where kills belonging to the val# defined by a two-address instruction is also on the val# that defines the input.

llvm-svn: 47057

* Ignore copy instructions which have already been coalesced.

llvm-svn: 47056

node as soon as we create it in SDISel.  Previously we would lower it in
legalize.  The problem with this is that it only exposes the argument
loads implied by FORMAL_ARGUMENTs after legalize, so that only dag combine 2
can hack on them.  This causes us to miss some optimizations because 
datatype expansion also happens here.

Exposing the loads early allows us to do optimizations on them.  For example
we now compile arg-cast.ll to:

_foo:
	movl	$2147483647, %eax
	andl	8(%esp), %eax
	ret

where we previously produced:

_foo:
	subl	$12, %esp
	movsd	16(%esp), %xmm0
	movsd	%xmm0, (%esp)
	movl	$2147483647, %eax
	andl	4(%esp), %eax
	addl	$12, %esp
	ret

It might also make sense to do this for ISD::CALL nodes, which have implicit
stores on many targets.

llvm-svn: 47054

DAGCombine is now quite good at zapifying them.

llvm-svn: 47053