Added TODO list to typechecker.sml

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

  Added support for field negation to high-il-opt.

  Catmull-Rom is C1 (not C2)

  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

  Working on support for sequences

  Starting work on an OpenCL backend

  Added support for cross product

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

  Added evals, evecs, outer, and trace to Basis

  Added T_Array type to AST

  Add missing case

  Added support for vector inputs

  fix handling of killPath

  Bug fix: use consistent axis order

  Bugfix: missing code when exit was stabilize/die

  Bug fix: get printing format right for vectors

  Bug fix: better CFG editing

  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

  Add stabilize method for strands that don't have them

  Started to add field normalization code to high-opt

  Introduce variable decls into SimpleAST representation.  We need these so that
  the result variables that are introduced for conditional expressions can be
  correctly handled by the translation to SSA.

  Fixed voxel index calculation

  Bug fix: flip order of components in coefficient vectors so that they match the
  order of the voxel vectors

  Fix potential type error in generated code

  Bug fix: be more careful about flushing pending code.

  Fix coefficients in probe code

  Add cast to generated code to avoid warning message

  Preparing to support the rest of the build process in the compiler

  Fix file name

  New file

  Use UnixPath module to find dnorm executable

  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.

  Since initially only supports rectangular-shaped iteration, we can lift the range
  computation outside the iterations.  This allows us to determine the dimensions and
  to change the order of loop nesting.

  Fixed a typechecking issue with iteration

  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

  Added pretty printing for initially code in IL

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

  Starting to implement support for initially

  Special case for 0 as a floating-point literal

  Fixed bug in computing coefficients for probes

  Fixed bug in construction of CFG.  The order of predecessors was backwards

  Fixed bug in the handling of assignments to literals

  Added missing new lines and function for printing TreeIL statements

  Fixing pretty printing

  Bug fix: the update function was cast to the wrong type

  Added compact flag for printing IL

  Fix bug in order of axes when doing the convolution reduction (should be
  fastest to slowest).

  adding comments

  Fix conversions from float vector to integer vectors

  Count live variables in exit nodes

  Added evaluation support for E_Cons

  Fixed bug in generation of voxel addressing

  Added documentation

  Fix typo in comment

  Fixed bug in code generation for inside test

  Working on missing pieces of code generation

  New file

  Streamlined code for real to int conversions

  Working on code generation

  Working on code generation

  Working on code generation.

  Working on C target and code generation

  Add decls for local variables

  Added additional CM files to CM file list

  Working on code generation

  Working on code generation

  Working on code generation

  Split runtime names and C target types into their own modules.

  Added "allowedInline" function

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

  Working on code generation

  Add border parameter to Inside operator and swap argument order to match
  surface language operator.

  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

  Adding documentation

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

  Working on code generation

  Debugging code generation

  Remove old IL types.sml file

  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

  Add codegen hook into driver

  Working on code generation

  Added Controls module

  Adding some info about x86 intrinsics

  Working on code generation

  Working on code generation

  Working on code gen

  Working on code generation

  Working on code generation

  Many changes to IL operators for fields and images.

  Working on new field operations

  Working on code generation

  Working on code generation

  Working on code generation 

  Working no mid to low conversion

  Debugging new IL

  Debugging new IL

  Debugging new IL

  Debugging new IL

  Add better IL pretty printing

  Update pretty printer for new IL

  working on porting to new IL

  Working on porting to new IL

  Made cfg type immutable

  Change "actor" to "strand"

  Working on porting to new IL

  Working on porting to new IR

  Working on port to new IR

  Work around for new IL

  Working on porting to new CFG IR

  Working on porting to new IL

  Porting code to new IL

  Fixing type errors

  Added splice implementation

  Fixing type errors

  Working on pure CFG representation

  Creating a branch to explore a pure CFG IL

  Changed typing rules for tensor construction.  The convention is now slow-to-fast
  for tensor dimensions.

  Added additional operations on fields (F+F, F-F, sF, Fs, F/s)

  Fixed typos

  Fix typos

  Working on mid-to-low translation

  Working on MidIL to LowIL translation

  Working on MidIL to LowIL translation

  Added fromDigits function

  Added explode function

  Working on mid-to-low translation

  Working on Mid to Low translation

  Working on LowIL

  Working on low-il

  Working on codegen

  Working on codegen

  Working on coed generation

  Minor edit

  Working on code generator API

  Change name of MidIL Transform operator to PosToImgSpace.  Also added GradToWorldSpace operator to MidIL.

  Clarify description of simplify

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

  Beginnings of code generation infrastructure

  fix comment

  Starting to work on mid-to-low translation

  update descriptions of passes

  Slightly better error reporting

  Bug fix: realTy == VecTy 1 (not 0)

  Filter out dimensions of size one in tensor types

  Starting to work on the LowIL representation

  Bug fix: get type of Inside right

  Bug fix: wrong signature for EvalKernel

  Bug fix: get type of Select right

  Adding MidIL checking

  Better error messages

  Bug fix: add missing code to set CFG edges in destination

  Added checking for HighIL representation

  Bug fix: get the result type of condtional expressions right when simplifying

  bug fix for conditional expressions

  Working on checking

  More work on checking

  Working on IL checking

  Rename file

  Working on checking code

  Working on HighIL checking code

  Added more type info to HighIL operators to aid checking.

  Simplify basis by removing cruft that is not being used.

  Working on checking for HighIL

  Started to work on checking code for HighIL

  Minor edits

  reorganize operators a bit

  fixed typo

  Slice support in HighIL

  Working on slice support

  Added types to pretty printing

  bug fixes

  Fix inexhaustive matches by adding E_Slice placeholders

  Added types to IL variables

  new files

  Moving IL types out of the Op structures into their own per-IL structures.

  Move MidIL types into their own module

  Copy some of the translation boilerplate from the high-to-mid translation
  into the mid-to-low translation

  normalize tensor shapes in prune functions (e.g., tensor[1] ==> tensor[]).

  Fixed bug in grammar

  Working on adding slice notation and fixed precedence of differentiation

  Added conditional expression syntax

  Debugging probe.sml.

  Added fld2d' test case

  Bug fixes to HigiIL optimization

  Added parse-tree support for conditional expressions (still need parser support)

  Started to work on IL checker

  Working on optimization and translation

  Added HighIL to MidIL translation phase

  Working on translation

  Working on high to mid translation

  removed Transform from high IL

  Working on translation functor

  working on translation

  Adding new file for translation support

  Working on high to mid translation

  Move test-kernel stuff to fields directory

  Added hash-cons representation of IL expressions

  Debugging generation of probe code

  Debugging probe.sml

  Working on test driver for probe code

  Added assignToString function

  working on HighIL to MidIL translation

  Fixed header comment

deleting a random file

adding the translate directory for mid-to-low il

Adding the files for the low-il specs

  Adding comments

  New files

  Implementing the census functor

  Working on debugging HighIL optimization

  Working on HighIL optimization

  Put optimization passes in IL directories

  Added some comments

  Working on high to mid translation

  Tweaking MidIL definition

  Fixed bugs in mid-il and IL generator

  Working on HighIL to MidIL translation

  Added compiler README file

  Adding placeholder directories

  Working on probe code generation

  Working on HighIL optimizer

  comments

  Working on compiler

  tweaking mid IL

  new files

  added convolve function

  Added Stats module

  More general representation of image samples

  Added newProp and newFlag functions for nodes, stmts, and vars

  Made the IL generator more general to handle MidIL features

  Working on MidIL representation

  New directory

  Make the "lift" phase be more agressive about evaluating

  merge DIFF and CONV constructors

  tweaking printing of SSA IL

  Moving high-IL stuff to its own directory

  Some work on SSA checking code

  Change kernel representation to not rely on symmetry

  Bug fix

  Added BackwardDFAFn functor

  Added ForwardDFAFn functor

  New version of IL with translation to HighIL and pretty printing.

  Adding more Unicode operators

  Added infix convolve syntax

 Output to log file

  Support evaluation for more functions

  Added smart constructors

  Bug fix: get the order of instantiated meta variables right

  Bug fix: add missing case to pruneShape

  Working on lifting and translation

  Working on image-info input

  Use the log file for debugging output

  Added Log structure

  Hook in evaluation of statics

  Bug fixes

  Working on static evalution

  Working on static evaluation

  Working on evaluation of static globals

  Added Inputs module to handle static input variables

  Added type field to E_Input in Simple AST.

  Made typechecking more strict.

  Working on lifting

  Working on translation to HighIL

  Added E_Input and E_Field constructors to Simple AST

  Reorganize stuff to do with images, kernels, and fields into its own directory.

  Reorganizing source

  Working on translateion

  Added Var substructure to SSAFn

  Starting to add utility code for SSA representations

  Working on translation to HighIL

  Update

  Adding operations for fields

  Working on translation to IL

  Added Tbl structure

  Working on translation to IL

  Minor work on translation

  Working on translation to HighIL

  Working on translation to IL

  Working on IL representation

  Add generator for IL operator structures.

  Renamed internal variable input to optInput and added input variable.

  Working on translation

  Working on translation to HighIL

  Added toType, toDiff, toShape, and toDim functions

  Added file

  Working on translation to HighIL

  Simplified AST code now uses default input values when no input is given.

  Switch the translate code to take simple AST as its input type

  Added pretty printing for simplified AST

  Adding simplify pass to driver

  Cleanup and simplification of AST representation

  New file: working on pretty printing for Simple AST

  Adding simple-ast representation

  Restrict polymorphism to operators/functions.

  Split function and variable namespaces and add notion of restricted operations
  that cannot appear inside actor or initialization code.

  Working on translation to HighIL

  Added comment

  New file

  Adding equality tests and hashing support

  Added output state variables and stabilize methods

  Added kernel printing code

  Debugging kernel support using test driver

  Added min and max on reals.

  Added RawTypes module

  Starting to write a test driver for the kernel code

  Made kernel type abstract and added derivative cache.

  Added toReal function

  Working on IR

  Added variable sets and maps

  Working on IL representation

  Merging image-info into IL directory

  merge image-info directory into the IL directory

  Added normalize function

  Working on IL

  Parameterize the SSA representation over the operators

  Fixed syntax error

  New file

  Adding configuration support

  Fix syntax errors

  Added compare to Rational

  Switched kernels to use rational coefficients and added definitions of common
  kernels.

  Fix bugs

  Working on rational numbers for the kernels

  Restore Gordon's edits

  Moving compiler sources into src/compiler