Fix calls with no arguments

llvm-svn: 20975

18.8 to 14.8 seconds.  The Pattern ISel is now often faster than the
Simple ISel, esp. on memory intensive code.

llvm-svn: 20973

llvm-svn: 20972

say that we support them, for the purposes of generating fsel instructions.

llvm-svn: 20970

llvm-svn: 20969

generate compare immediate for integer compare with constant
fold setcc into branch
fold setcc into select

Code generation quality for Shootout is now on par with the Simple ISel

llvm-svn: 20968

llvm-svn: 20967

llvm-svn: 20965

  * Stop being pessimistic about output register allocation
  * Start to handle function descriptors: compute target GPs and so on
  when doing indirect calls etc. Not there yet, though. For the moment,
  we try to use _indirect_ branches wherever possible, to stress test
  function descriptors.
  * FP divide-by-zero should work now
  * add varargs (it doesn't work, though)

At this point, all of SingleSource passes (modulo C++ tests that are due
to issues with the CFE, see note in the README.) Much of MultiSource also
passes although there's still a ton of bugs around. Something for me to
work on tomorrow, then. :)

llvm-svn: 20960

* begin great adventure into correct function descriptor materialization

llvm-svn: 20956

llvm-svn: 20955

used to get FP div-by-zero working properly (shunt the right answer
depending on how frcpa sets its predicate output)

llvm-svn: 20954

LowerCallTo.
Handle ISD::ADD in SelectAddr, allowing us to have nonzero immediates for
loads and stores, amazing!

llvm-svn: 20946

Tell the SelectionDAG ISel to expand SEXTLOAD of i1 and i8, rather than
  complicate the code in ISD::SEXTLOAD to do it by hand
Combine the FP and Int ISD::LOAD codegen
Generate better code for constant pool loads

As a result, all of Shootout, and likely many other programs are now
working.

llvm-svn: 20945

Implement SINT_TO_FP and UINT_TO_FP
Remove some dead code from the simple ISel

llvm-svn: 20944

llvm-svn: 20942

Shootout now works.

llvm-svn: 20940

don't support things like memcpy directly.  This allows a handful of the
Shootout programs to work, yay!

llvm-svn: 20939

them up after the code has been emitted.  This allows targets to select one
mbb as multiple mbb's as needed.

llvm-svn: 20937

llvm-svn: 20936

llvm-svn: 20935

llvm-svn: 20934

llvm-svn: 20933

llvm-svn: 20932

Compare dependence analysis with llvm instructions versus machine instrutions. the  problem with using machine instructions and alias analysis is that aa does not handle tmp instructions.

llvm-svn: 20931

Dependence analyzer that just determines dependences within a loop for loads and stores using alias analysis.

llvm-svn: 20930

llvm-svn: 20929

llvm-svn: 20928

external linkage as incomplete.

llvm-svn: 20927

returned integer values all of the way to 64-bits (we only did it to 32-bits
leaving the top bits undefined).  This causes problems for targets like alpha
whose ABI's define the top bits too.

llvm-svn: 20926

llvm-svn: 20925

us to have stuff pointing to the null pointer, which makes no sense
(the null ptr is an ssa value, not the null object)

llvm-svn: 20922

llvm-svn: 20920

llvm-svn: 20917

pointer analysis.

llvm-svn: 20916

and a couple of other functions that are important.

Handle aggregate undef values for gv initializers

llvm-svn: 20914

llvm-svn: 20907

Simple  ISel: fix i64 subtract

llvm-svn: 20903

More pattern isel updates

llvm-svn: 20902

llvm-svn: 20901