Add new BreakCriticalEdges pass

llvm-svn: 3903

llvm-svn: 3902

llvm-svn: 3901

Cwriter.

llvm-svn: 3900

cwriter.

llvm-svn: 3899

llvm-svn: 3898

        %cast109 = cast uint %cast212 to short          ; <short> [#uses=1]
        %cast214 = cast short %cast109 to uint          ; <uint> [#uses=1]
        %cast215 = cast uint %cast214 to short          ; <short> [#uses=1]

llvm-svn: 3897

llvm-svn: 3896

Basically, this bug boiled down to calling replaceUsesOfWith on a constant,
which changed it's shape in an illegal way.  This pass now goes through all
of the trouble neccesary to do the replacement on constants.

llvm-svn: 3895

llvm-svn: 3894

llvm-svn: 3893

llvm-svn: 3892

* Make sure "Changed" is updated correctly

llvm-svn: 3891

llvm-svn: 3890

llvm-svn: 3889

This bug was exposed linking the SPEC benchmark suite.

llvm-svn: 3888

llvm-svn: 3887

llvm-svn: 3886

llvm-svn: 3885

object files.  Also,

llvm-svn: 3884

llvm-svn: 3883

llvm-svn: 3882

llvm-svn: 3881

llvm-svn: 3880

  the -debug-pass=Arguments option
* Run instcombining BEFORE mem2reg so that getelementptr X, long 0's are
  cleaned up.  This is also important because scalar replacement of aggr.
  will want instcombine to run before it goes as well.

llvm-svn: 3879

is only a single return from the function!

llvm-svn: 3878

* Build burg as a utility now, change its location
* Clean up other rules

llvm-svn: 3876

llvm-svn: 3875

gram.y to gram.yc so that we don't try to turn it into a .cpp file.

llvm-svn: 3874

llvm-svn: 3873

llvm-svn: 3872

This fixes a number of FP precision problems, making the output of the
power benchmark closer to the right answer.

Unfortunately, this only addresses FP constants used directly in functions.
Constants referred to by global constants (such as an array of FP values)
aren't helped by this.  Until this happens power won't work.

llvm-svn: 3871

llvm-svn: 3870

llvm-svn: 3869

llvm-svn: 3868

llvm-svn: 3867

Changed uchar to unsigned char in function ParseBytecodeBuffer, because seemingly it affects opt in uncertain ways :)

llvm-svn: 3866

llvm-svn: 3865

llvm-svn: 3864

llvm-svn: 3863