llvm-svn: 11703

hot 164.gzip loop.

llvm-svn: 11702

This occurs in 164.gzip, as a result of it declaring arrays extern.

llvm-svn: 11701

value is a physreg and one is a virtreg.  For this reason, disable copy folding
entirely for physregs.  Also, use the new isMoveInstr target hook which gives us
folding of FP moves as well.

llvm-svn: 11700

Also make it less aggressive as the current implementation breaks in
some cases.

llvm-svn: 11696

FIX MAJOR BUG, whereby we didn't merge null edges correctly. Correcting this
fixes poolallocation on 175.vpr, and possibly others.

llvm-svn: 11695

correctly merged over!

llvm-svn: 11693

llvm-svn: 11692

llvm-svn: 11691

llvm-svn: 11690

in a signal handler, allocating memory or doing other unsafe things is bad,
which means we should do it in a different process.

llvm-svn: 11689

llvm-svn: 11687

BU propagation, clone the globals into the GG of EACH FUNCTION that finishes
processing!  The GlobalsGraph *must* include all globals and effects from
all functions in the program.  Fixing this makes pool allocation work better
on 175.vpr, but it still ultimately crashes.

llvm-svn: 11686

end of the BU and CBU passes.  The globals will be marked incomplete, so it
doesn't matter if they are missing some info, and merging isn't guaranteed
to bring everything in anyway!

llvm-svn: 11684

printf and scanf families!

llvm-svn: 11683

llvm-svn: 11682

llvm-svn: 11681

installation of Povray (and not do anything for people who don't have it).

llvm-svn: 11680

llvm-svn: 11678

llvm-svn: 11676

llvm-svn: 11675

llvm-svn: 11674

llvm-svn: 11673

llvm-svn: 11672

llvm-svn: 11668

llvm-svn: 11662

llvm-svn: 11661

llvm-svn: 11660

llvm-svn: 11659

llvm-svn: 11658

llvm-svn: 11657

llvm-svn: 11656

llvm-svn: 11655

1. LiveIntervals now implement a 4 slot per instruction model. Load,
   Use, Def and a Store slot. This is required in order to correctly
   represent caller saved register clobbering on function calls,
   register reuse in the same instruction (def resues last use) and
   also spill code added later by the allocator. The previous
   representation (2 slots per instruction) was insufficient and as a
   result was causing subtle bugs.

2. Fixes in spill code generation. This was the major cause of
   failures in the test suite.

3. Linear scan now has core support for folding memory operands. This
   is untested and not enabled (the live interval update function does
   not attempt to fold loads/stores in instructions).

4. Lots of improvements in the debugging output of both live intervals
   and linear scan. Give it a try... it is beautiful :-)

In summary the above fixes all the issues with the recent reserved
register elimination changes and get the allocator very close to the
next big step: folding memory operands.

llvm-svn: 11654

we can get.

llvm-svn: 11653

very helpful.  Let bugpoint favor being helpful instead of determined.

llvm-svn: 11652

llvm-svn: 11651

compiling 129.compress... so don't!

llvm-svn: 11649

llvm-svn: 11638

llvm-svn: 11636