llvm-svn: 14997

llvm-svn: 14996

llvm-svn: 14995

Patch contributed by the fabulous Nate Begeman.

llvm-svn: 14994

* vreg <-> vreg joining now works, enable it unconditionally when joining
  is enabled (which is the default).
* Fix a serious pessimization of spill code where we were saying that a
  spilled DEF operand was live into the subsequent instruction.  This allows
  for substantially better code when spilling starts to happen.

llvm-svn: 14993

order, causing the inactive list in the linearscan list to get unsorted, which
basically fuxored everything up severely.

These seems to fix the joiner, so with more testing I will enable it by default.

llvm-svn: 14992

llvm-svn: 14991

is sorted.  This is not the case currently, which is causing no end of
problems.

llvm-svn: 14990

Heavily refactor handleVirtualRegisterDef, adding comments and making it more
efficient.  It is also much easier to follow and convince ones self that it is
correct :)

Add -debug output to the joine, showing the result of joining the intervals.

llvm-svn: 14989

remove map that is not needed

llvm-svn: 14988

llvm-svn: 14987

classof<ConstantXXX> is now MUCH faster than it used to be.

llvm-svn: 14986

llvm-svn: 14985

rename ConstantVal to SimpleConstantVal

llvm-svn: 14984

llvm-svn: 14983

llvm-svn: 14982

llvm-svn: 14981

llvm-svn: 14980

and a list of don'ts for the library. All so future maintainers don't
break the important contract this library has with its user: LLVM.

llvm-svn: 14979

llvm-svn: 14978

llvm-svn: 14977

llvm-svn: 14976

llvm-svn: 14975

llvm-svn: 14974

night compiling cfrac.  It did not realize that code like this:

int G; int *H = &G;

takes the address of G.

llvm-svn: 14973

llvm-svn: 14972

llvm-svn: 14971

Updated to remove references to ConstantPointerRef and reflect the change
in the inheritance hierarchy: GlobalValue now derives from Constant.

llvm-svn: 14969

llvm-svn: 14968

llvm-svn: 14967

llvm-svn: 14966

llvm-svn: 14965

too.

llvm-svn: 14964

llvm-svn: 14963

llvm-svn: 14962

llvm-svn: 14961

llvm-svn: 14960

llvm-svn: 14959

llvm-svn: 14958

llvm-svn: 14957