When rewriting defs and uses after spilling, don't set the weight of a
live interval to infinity if the instruction being rewritten is an
original remat def instruction.  We were only checking against the clone
of the remat def which doesn't actually appear in the IR at all.

llvm-svn: 51440

Don't attempt to update SpillSlotToUsesMap for stack slots that aren't
generated by the spiller.

llvm-svn: 51439

BB1:                                                                                                                                                  
  vr1025 = copy vr1024                                                                                                                                
  ..                                                                                                                                                  
BB2:                                                                                                                                                  
  vr1024 = op                                                                                                                                         
         = op vr1025                                                                                                                                     
  <loop eventually branch back to BB1>

Even though vr1025 is copied from vr1024, it's not safe to coalesced them since live range of vr1025 intersects the def of vr1024. This happens when vr1025 is assigned the value of the previous iteration of vr1024 in the loop.

llvm-svn: 51394

ComputeNumSignBits to SelectionDAG's ComputeNumSignBits.

llvm-svn: 51348

llvm-svn: 51345

If local spiller optimization turns some instruction into an identity copy, it will be removed. If the output register happens to be dead (and source is obviously killed), transfer the kill / dead information to last use / def in the same MBB.

llvm-svn: 51306

llvm-svn: 51305

$non_lazy_ptr's and $lazy_ptr's.

llvm-svn: 51277

API change for {BinaryOperator|CmpInst|CastInst}::create*() --> Create. Legacy interfaces will be in place for some time.  (Merge from use-diet branch.)

llvm-svn: 51200

llvm-svn: 51192

original method caused gcc-4.2 to complain.

llvm-svn: 51186

something with a v1 type.

llvm-svn: 51160

moving toward making structs and arrays first-class types.

llvm-svn: 51157

Make use of vector load and store operations to implement memcpy, memmove, and memset. Currently only X86 target is taking advantage of these.

llvm-svn: 51140

llvm-svn: 51131

llvm-svn: 51126

llvm-svn: 51123

are represented as "weak", but there are subtle differences
in some cases on Darwin, so we need both.  The intent
is that "common" will behave identically to "weak" unless
somebody changes their target to do something else.
No functional change as yet.

llvm-svn: 51118

llvm-svn: 51115

SETOEQ, is it does with (SETEQ & SETULE), map it to SETEQ.

llvm-svn: 51112

llvm-svn: 51089

Instead of a vector load, shuffle and then extract an element. Load the element from address with an offset.
        pshufd $1, (%rdi), %xmm0
        movd %xmm0, %eax
=>
        movl 4(%rdi), %eax

llvm-svn: 51026

address of the PassInfo directly instead of calling getPassInfo.
This eliminates a bunch of dynamic initializations of static data.

Also, fold RegisterPassBase into PassInfo, make a bunch of its
data members const, and rearrange some code to initialize data
members in constructors instead of using setter member functions.

llvm-svn: 51022

several things that were neither in an anonymous namespace nor static
but not intended to be global.

llvm-svn: 51017

Teach X86 a few more vsetcc patterns.  Custom lowering for unsupported ones is next.

llvm-svn: 51009

Xform bitconvert(build_pair(load a, load b)) to a single load if the load locations are at the right offset from each other.

llvm-svn: 51008

if those blocks consist entirely of common instructions;
merging will not add an extra branch in this case.

llvm-svn: 51006

changes that don't change functionality.

llvm-svn: 51004

semantically identical, but little difference in
either results or execution speed; but it's much
easier to read, at least IMO.

llvm-svn: 50999

llvm-svn: 50991

llvm-svn: 50990

This is necessary to unbreak the build.

llvm-svn: 50988

possible for it to produce worse code than before.

The rest of this patch is code cleanup.

llvm-svn: 50987

llvm-svn: 50967

If all sources of a PHI node are defined by an implicit_def, just emit an implicit_def instead of a copy.

llvm-svn: 50927

 - Comment fixes.
 - Moar whitespace.
 - Made ivars "private" by default.
No functionality change.

llvm-svn: 50926

no functional change.

llvm-svn: 50921

case where there are multiple blocks with a large
number of common tail instructions more efficiently
(compile time optimization).

llvm-svn: 50916

Darwin.  This is a hack of course, but it does
at least look at the right thing: gotpcrel means
that this is already an offset, so an explicit
offset is not needed (and wrong).  I think this
is good enough for the moment: Anton is working
on something better.

llvm-svn: 50850

llvm-svn: 50836