natural loop canonicalization (which does many cfg xforms) by 4.3x, for 
example.  This also fixes a bug in postdom dfnumber computation.

llvm-svn: 40920

llvm-svn: 40919

- Fix some minor bugs related to special markers on val# def. ~0U means
  undefined, ~1U means dead val#.

llvm-svn: 40916

llvm-svn: 40915

llvm-svn: 40914

kill instruction #, and source register number (iff the value# is defined by a
copy).
- Now def instruction # is set for every value#, not just for copy defined ones.
- Update some outdated code related inactive live ranges.
- Kill info not yet set. That's next patch.

llvm-svn: 40913

llvm-svn: 40912

llvm-svn: 40911

llvm-svn: 40909

llvm-svn: 40908

SSE mode (all but conversions <-> other FP types, I think):
>>Do not mark all-80-bit operations as "Requires[FPStack]"
(which really means "not SSE").
>>Refactor load-and-extend to facilitate this.
>>Update comments.
>>Handle long double in SSE when computing FP_REG_KILL.

llvm-svn: 40906

llvm-svn: 40905

llvm-svn: 40904

llvm-svn: 40903

Add the -version option.

llvm-svn: 40902

llvm-svn: 40900

Make this code more efficient

llvm-svn: 40899

Fix comment typo

llvm-svn: 40898

Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator.

llvm-svn: 40897

Add a missing forward declaration.

llvm-svn: 40896

llvm-svn: 40895

llvm-svn: 40894

llvm-svn: 40893

llvm-svn: 40892

option which is similar.

llvm-svn: 40891

llvm-svn: 40890

llvm-svn: 40889

llvm-svn: 40887

Last x87 bits for full functionality (not
thoroughly tested, and long doubles do not work
in SSE modes at all - use -mcpu=i486 for now)

llvm-svn: 40886

llvm-svn: 40885

on 403.gcc from ~15s to ~10s.

llvm-svn: 40884

llvm-svn: 40883

This brings GVN to parity with GCSE+LoadVN.

llvm-svn: 40882

llvm-svn: 40881

llvm-svn: 40880

llvm-svn: 40879

llvm-svn: 40878

(on Darwin, anyway).  Fix some table omissions for
LD arithmetic.

llvm-svn: 40877

llvm-svn: 40875

llvm-svn: 40874