Printing support (scalar values only for starts)

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  Added support for placeholder substitution in verbatim code

  Renamed the MethodName module StrandUtil and added the strand properties to it.  Also added
  strand properties to the IL representation.

  Major change to the intermediate representation.  The loading and saving of
  strand state variables is now explicit, which simplifies a lot of things.

  Added TargetEnv structure.  Also switched sources.cm to not be generated by configuration.

  Added datatype to represent method names.

  Added support for "do ... while" loops.

  Cleanup address-space qualifiers

  Add support for casting argument types.

  Added bitwise operators to CLang

  Changed T_Attr to T_Qual, since the C spec uses "type-qualifier" for
  this syntactic form.  Also added missing "__global" qualifier.

Removed embedded pointers on both the host and gpu side

  merging changes from trunk

  Fixed typo

  Minor tweak

OpenCL runtime now compiling correctly and contains hookups

  Working on OpenCL support

  Make CLang.mkInt easier to use

  Minor tweaks

  remove obsolete comments

  Made TreeToCL into a functor parameterized over the translation of variables.
  This allows different clients to have different representations for globals, etc.

  Move OpenCL specific types from clang.sml to cl-target.sml

  Added name field to program representation and switched to smart constructors
  in OpenCL backend

Final touches on the cl code

  Working on command-line option support

  Working on compiler support for command-line options

Added the code for generating OpenCL

  Working on support for parallel runtime

  Minor fixes

  Working on multiple-target support

  Added configure checks for OpenCL and made the codegen sources.cm file be a
  generated file

  Lots of work on getting the IL invariants right.

  Working on debugging value numbering

  Adding support for program properties in TreeIL and fix a bug in the handling
  of die in variable analysis.

  More tweaks to get strand state variables right.

  Fixed potential syntax error in output

  Lots of tweaking of the variable analysis phase and its use in translating
  Low IL to Tree IL.

  Code reorganization: split the tree-il stuff into its own directory and moved the
  variable analysis into that directory too.  This reorg. is in anticipation of using
  the variable scoping information from VarAnalysis in the translation to TreeIL.

  Incomplete bug fix for parameters in methods

  Finish implementing field scaling, addition, and subtraction

  A lot of changes to better handle variable scoping etc.

  Added timing of compiler phases to help isolate performance bugs.

  Added partial support for mapping tensors from image space back to world space.
  Still need runtime system support for Hessians (see include/Diderot/inline-image.h)

  Fixed subtracting negative literal bug

  Several CLang changes:
    1) fixed bug with printing negative literals (e.g., a - -1)
    2) added support for assignment and shift operators to CLang.
    3) added break and continue.
    4) added printing support for nan

  fixed spelling in a comment

  Fixed field negation

  fixing bugs in refactored code generator

  Working on refactoring

  Working on codegen refactoring

  Working on refactoring code generation

  More work on refactoring

  Added more target properties to TARGET signature

  parameterize low-il to tree-il translation by target

  Make the low-to-tree translation be parameterized over the target

  More refactoring work

  Working on refactoring code generation

  Removed InvScale from IL.  Instead, we invert the and use Scale in translate-basis.sml

  Be more consistent about using functions to build CLang terms (instead of using
  the raw constructors)

  Change Norm operator in MidIL and LowIL to work on arbitrary tensor
  types.  Still need codegen support.

  Added codegen support for vector-matrix, matrix-vector, and matrix-matrix
  multiplication

  Working on codegen support for vector-matrix, matrix-vector, and matrix-matrix
  multiplication.

  Generalized dot product to inner product of tensor types.  Added IL support for
  vector-matrix, matrix-vector, and matrix-matrix multiplications.  Code generation
  and runtime support is still missing.

  Added matrix subscripting support to code generation

  Added codegen support for creating matrices

  Added lerp as an overloaded function

  Add Trace to codegen

  Overhaul in the way that the MidIL and LowIL represent tensor types (especially
  for orders > 1).  We still need to deal with the flattening of tensor-value
  construction

  Finish support for normalize

  Added subscript for vectors and code generation for Subscript when argument
  is vector.

  Working on implementation of tensor slices

  Added mechanism for supporting "black box" functions (e.g., sin and sqrt).
  Also added atan2, sqrt, and tan functions to Basis

  Added trace operator for 2x2, 3x3, and 4x4 matrices

  Bugfix: missing code when exit was stabilize/die

  Added support for tracking output state variables through ILs and generating
  a print function in the C target.

  Fixed bug when update always ended in stabilize/die.

  Starting to work on partitioning strand states

  Fix potential type error in generated code

  Bug fix: be more careful about flushing pending code.

  Switch to compiler-generated initially code.

  Working on generating initially code.  Also changed var and exp types in CTarget to
  be datatypes for better typechecking and documentation.

  More work on supporting initially in code generation

  Adding for loops to C code generator

  Added ++ and -- as prefix and postfix operators

  Adding for loops to TreeIL to support initially code generation

  Adding support for initially to IL.  Also factored out more common code from
  high-to-mid and mid-to-low into translate-fn.sml

  Fixed bug in the handling of assignments to literals

  Added missing new lines and function for printing TreeIL statements

  Working on missing pieces of code generation

  Streamlined code for real to int conversions

  Working on code generation

  Working on code generation

  Working on code generation.

  Add decls for local variables

  Working on code generation

  Working on code generation

  Added "allowedInline" function

  Lots of changes to push image info through to the code generator.

  Working on code generation

  Working on code generation

  Added E_Cons support to TreeIL pretty printer

  Fixed issue in low-to-tree conversion when one branch of if ends in die or stabilize

  Debugging code generation

  More work on code generation.  Made sure that the census info is initialized for
  all ILs.

  Working on code generation

  Debugging code generation

  Working on code generation: added printing for TreeIL

  Working on code generation

  Working on code generation

  Working on code generation

  Working on code generation

  Working on code generation

  Working on code generation

  More work on code generation

  Working on code generation

  Working on code generation

  Working on code generation

  Working on code generation

  Working on code gen

  Working on code generation

  Working on code generation

  Working on code generation

  Working on code generation 

  Change "actor" to "strand"

  Creating a branch to explore a pure CFG IL

  Working on codegen

  Working on codegen

  Working on coed generation

  Minor edit

  Working on code generator API

  Upated URL in header to diderot-language.cs.uchicago.edu

  Beginnings of code generation infrastructure