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

llvm-svn: 47052

llvm-svn: 47051

type is not legal.

llvm-svn: 47048

PR1877.
A3 = op A2 B0<kill>                                                                                                                                                                            
...                                                                                                                                                                                     
B1 = A3      <- this copy                                                                                                                                                                      
...                                                                                                                                                                                          
   = op A3   <- more uses                                                                                                                                                                      
                                                                                                                                                                                                 
==>                                                                                                                                                                                             
                                                                                                                                                                                            
B2 = op B0 A2<kill>                                                                                                                                                                            
...                                                                                                                                                                                          
B1 = B2      <- now an identify copy                                                                                                                                                           
...                                                                                                                                                                                          
   = op B2   <- more uses

This speeds up FreeBench/neural by 29%, Olden/bh by 12%, oopack_v1p8 by 53%.

llvm-svn: 47046

llvm-svn: 47045

- removeRange() can now update value# information.

llvm-svn: 47044

llvm-svn: 47043

llvm-svn: 47042

Add an overload that supports the uint64_t interface for use by clients
that haven't been updated yet.

llvm-svn: 47039

Spotted by Nick Kledzik.

llvm-svn: 47037