llvm-svn: 2701

llvm-svn: 2700

llvm-svn: 2697

* Insert accurate prototypes for functions
* Insert casts to use accurate prototypes

llvm-svn: 2677

That was causing a miscompilation of strtol/atoi plus others

llvm-svn: 2669

lli and llc.  This is controlled with options -tracehash on|off.

Also, added an option to specify which functions should be traced.
Particularly useful to reduce output volume in basic-block tracing.

llvm-svn: 2646

* Add optimization to rank computation to not recursively search when
  unneccesary.
* More agressively negate expressions to open reassociation opportunities.
* Linearize (A+B)+(C+D) into ((A+B)+C)+D

llvm-svn: 2637

By making sure to consider binary expressions identical if their operands
are backwards, but swappable.

llvm-svn: 2629

llvm-svn: 2627

"This testcase caused instcombine to fail because it got the same instruction on
it's worklist more than once (which is ok), but then deleted the instruction.
Since the inst stayed on the worklist, as soon as it came back up to be
processed, bad things happened, and opt asserted."

llvm-svn: 2623

be put either before or after a load.  We chose to cast the value loaded
instead of the pointer to load from.

Fixes bug: test/Regression/Transforms/LevelRaise/2002-05-10-LoadPeephole.ll

llvm-svn: 2621

llvm-svn: 2620

llvm-svn: 2617

llvm-svn: 2615

the command line

llvm-svn: 2601

llvm-svn: 2600

* Make cast-of-self-ty DCE the dead cast instruction immediately instead of
  waiting for it to be DCE'd by another sweep over the function.  This speeds
  this up noticably.

llvm-svn: 2597

llvm-svn: 2593

llvm-svn: 2582

llvm-svn: 2581

llvm-svn: 2566

* Bugfix:  A + -B and -A + B

llvm-svn: 2561

llvm-svn: 2559

llvm-svn: 2550

Cleanup code a lot

llvm-svn: 2547

llvm-svn: 2537

llvm-svn: 2536

llvm-svn: 2531

llvm-svn: 2530

llvm-svn: 2529

llvm-svn: 2526

the Scalar and Utils subdirectories

llvm-svn: 2523

llvm-svn: 2518

llvm-svn: 2517

llvm-svn: 2516

llvm-svn: 2515

llvm-svn: 2514

llvm-svn: 2513

  is empirically faster by a noticable margin, even though duplicates can
  happen.

llvm-svn: 2511

* Convert to worklist instead of iterative algorithm

llvm-svn: 2510