Implement feature: Cast's can now be converted to bitwise AND expressions.

llvm-svn: 3225

   - Reenable gep (gep x) -> x
   - Make instcombine do dead instruction elimination where it's really
     easy.  Now visitors don't have to ensure they aren't not processing
     dead instructions.

llvm-svn: 3222

llvm-svn: 3215

defintiions dominate their uses

llvm-svn: 3214

llvm-svn: 3213

Dominance calculation goes to VMCore library to be used by Verifier.

llvm-svn: 3210

llvm-svn: 3200

llvm-svn: 3199

llvm-svn: 3198

llvm-svn: 3195

This fixes bug: test/Regression/Transforms/LevelRaise/2002-07-31-AssertionFailure.ll

llvm-svn: 3193

llvm-svn: 3191

llvm-svn: 3188

llvm-svn: 3186

llvm-svn: 3185

llvm-svn: 3183

printed, but no others.

llvm-svn: 3178

llvm-svn: 3176

llvm-svn: 3173

llvm-svn: 3172

Also, we now use a separate globals graph to hold externally visible nodes.
This changes both the bottom-up and top-down propagation so that
globals and other external objects do not have to appear in every
function, but only in functions in which they are referenced or
they can be used to access something else that is referenced.

llvm-svn: 3171

This changes both the bottom-up and top-down propagation so that
globals and other external objects do not have to appear in every
function, but only in functions in which they are referenced or
they can be used to access something else that is referenced.

llvm-svn: 3170

print out the command line options for the optimizations it is running.

llvm-svn: 3165

* Internalize global variables with initializers
* Add new stat to track global variable internalization
* Only count functions that were not internal before in internalized function
  count

llvm-svn: 3163

Cleanup ConstantExpr handling:
 * Correctly delete TypeHandles in AsmParser.  In addition to not leaking
   memory, this prevents a bug that could have occurred when a type got
   resolved that the constexpr was using
 * Check for errors in the AsmParser instead of hitting assertion failures
   deep in the code
 * Simplify the interface to the ConstantExpr class, removing unneccesary
   parameters to the ::get* methods.
 * Rename the 'getelementptr' version of ConstantExpr::get to
   ConstantExpr::getGetElementPtr

llvm-svn: 3161

 * Correctly delete TypeHandles in AsmParser.  In addition to not leaking
   memory, this prevents a bug that could have occurred when a type got
   resolved that the constexpr was using
 * Check for errors in the AsmParser instead of hitting assertion failures
   deep in the code
 * Simplify the interface to the ConstantExpr class, removing unneccesary
   parameters to the ::get* methods.
 * Rename the 'getelementptr' version of ConstantExpr::get to
   ConstantExpr::getGetElementPtr

llvm-svn: 3160

llvm-svn: 3158

llvm-svn: 3157

* Implement stuff so that code can declare that they only depend on the CFG of
  a function, not on anything else.  This speeds up GCCAS a lot.

llvm-svn: 3155

Implement constant propogation of logical (and, or, xor) expressions.
Fixes testcase: test/Regression/Transforms/ConstProp/logicaltest.ll

llvm-svn: 3154

  is platform independant afterall.
* Object orientize the functions, cleanup code a bit.  Instead of static
  global functions, the helpers for instruction selection are now part of
  the InstructionSelection Pass class.

llvm-svn: 3147

  shared by backends.

llvm-svn: 3146

llvm-svn: 3143

attempted to assign it a name.

llvm-svn: 3142

  old call instruction
* Implement conversion of return values for calls.  This fixes bug:
   test/Regression/Transforms/FunctionResolve/retmismatch3.ll

llvm-svn: 3140

  which was caused by us not running the "drop references of dead
  instructions" code when there were no basic blocks that were dead.

  We still don't want to do some of the stuff we do if there are dead
  basic blocks, but we DO want to drop references of dead instructions,
  so we factor the common code out to a new method.

llvm-svn: 3137

arguments dropped.  This fixes bug:
   test/Regression/Transforms/ADCE/2002-07-17-PHIAssertion.ll

llvm-svn: 3134

Implement a new RemoveSuccessor function

llvm-svn: 3131

llvm-svn: 3129

  test/Regression/Transforms/SimplifyCFG/2002-06-24-PHINode.ll

llvm-svn: 3128