Before deleting a basic block, give other loop passes a chance cleanup analysis values, related to the instructions in the basic block.

llvm-svn: 67719

register classes. Before, MVT::Other would be returned anytime a reg was
in multiple register classes. Now, MVT::Other is only returned if the types
for those register classes differ.

llvm-svn: 67714

llvm-svn: 67702

Also fixes SDISel so it *does not* force promote return value if the function is not marked signext / zeroext.

llvm-svn: 67701

llvm-svn: 67694

stoppoint nodes around until Legalize; doing this
imposed an ordering on a sequence of loads that
came from different lines, interfering with scheduling.

llvm-svn: 67692

llvm-svn: 67691

llvm-svn: 67689

llvm-svn: 67688

call, we should treat "i64 zext" as the start of a constant expr, but
"i64 0 zext" as an argument with an obsolete attribute on it (this form
is already tested by test/Assembler/2007-07-30-AutoUpgradeZextSext.ll).

Make the autoupgrade logic more discerning to avoid treating "i64 zext"
as an old-style attribute, causing us to reject a valid constant expr.
This fixes PR3876.

llvm-svn: 67682

llvm-svn: 67681

Do not ignore DW_TAG_class_type!

llvm-svn: 67675

llvm-svn: 67669

llvm-svn: 67668

llvm-svn: 67667

not going to persue this further at this time.

llvm-svn: 67666

precise than it used to be.

llvm-svn: 67662

llvm-svn: 67661

llvm-svn: 67658

llvm-svn: 67657

llvm-svn: 67656

autoconf directory, but these paths need to be relative to the main
source directory.

llvm-svn: 67655

llvm-svn: 67654

llvm-svn: 67652

The configure line had --disable-bootstrap, but it was not
clear that this is essential.

llvm-svn: 67651

llvm-svn: 67649

llvm-svn: 67647

llvm-svn: 67642

to/from integer types that are not intptr_t to convert to intptr_t
then do an integer conversion to the dest type.  This exposes the
cast to the optimizer.

llvm-svn: 67638

and streamline code here a bit.

llvm-svn: 67636

1. Make instcombine always canonicalize trunc x to i1 into an icmp(x&1).  This 
   exposes the AND to other instcombine xforms and is more of what the code
   generator expects.
2. Rewrite the remaining trunc pattern match to use 'match', which 
   simplifies it a lot.
   

llvm-svn: 67635

llvm-svn: 67629

llvm-svn: 67622

the target constraint specifies a specific physreg.

llvm-svn: 67618

llvm-svn: 67617

fail.

llvm-svn: 67616

to be returned in DL. LLVM's multiple-return-value support is
not ABI-conforming; front-ends that wish to have code emitted
that conforms to an ABI are currently expected to make
arrangements for this on their own rather than assuming that
multiple-return-values will automatically do the right thing.
This commit doesn't fundamentally change this situation.

llvm-svn: 67588

canClobberPhysRegDefs if the successor node doesn't
clobber any physical registers.

llvm-svn: 67587

help out the register pressure reduction heuristics in the case of
nodes with multiple uses. Currently this uses very conservative
heuristics, so it doesn't have a broad impact, but in cases where it
does help it can make a big difference.

llvm-svn: 67586

llvm-svn: 67580