Commit Graph

26 Commits

Author SHA1 Message Date
Alan Baker
a771713e42 Adding an unique id to Instruction generated by IRContext
Each instruction is given an unique id that can be used for ordering
purposes. The ids are generated via the IRContext.

Major changes:
* Instructions now contain a uint32_t for unique id and a cached context
pointer
 * Most constructors have been modified to take a context as input
 * unfortunately I cannot remove the default and copy constructors, but
 developers should avoid these
* Added accessors to parents of basic block and function
* Removed the copy constructors for BasicBlock and Function and replaced
them with Clone functions
* Reworked BuildModule to return an IRContext owning the built module
 * Since all instructions require a context, the context now becomes the
basic unit for IR
* Added a constructor to context to create an owned module internally
* Replaced uses of Instruction's copy constructor with Clone whereever I
found them
* Reworked the linker functionality to perform clones into a different
context instead of moves
* Updated many tests to be consistent with the above changes
 * Still need to add new tests to cover added functionality
* Added comparison operators to Instruction
* Added an internal option to LinkerOptions to verify merged ids are
unique
* Added a test for the linker to verify merged ids are unique

* Updated MergeReturnPass to supply a context
* Updated DecorationManager to supply a context for cloned decorations

* Reworked several portions of the def use tests in anticipation of next
set of changes
2017-11-20 17:49:10 -05:00
Diego Novillo
d2938e4842 Re-format files in source, source/opt, source/util, source/val and tools.
NFC. This just makes sure every file is formatted following the
formatting definition in .clang-format.

Re-formatted with:

$ clang-format -i $(find source tools include -name '*.cpp')
$ clang-format -i $(find source tools include -name '*.h')
2017-11-08 14:03:08 -05:00
Steven Perron
94dc66b74d Change the sections in the module to use the InstructionList class.
This change will replace a number of the
std::vector<std::unique_ptr<Instruction>> member of the module to
InstructionList.  This is for consistency and to make it easier to
delete instructions that are no longer needed.
2017-10-25 15:52:06 -04:00
David Neto
2436794736 Optimizer: OpModuleProcessed is in its own layout section
This is a recent decision from the SPIR WG.  The spec update
has not yet been published.
Khronos SPIR-V internal issue 199
2017-10-23 10:46:37 -04:00
Pierre Moreau
86627f7b3f Implement Linker (module combiner)
Add extra iterators for ir::Module's sections
Add extra getters to ir::Function
Add a const version of BasicBlock::GetLabelInst()

Use the max of all inputs' version as version

Split debug in debug1 and debug2
- Debug1 instructions have to be placed before debug2 instructions.

Error out if different addressing or memory models are found

Exit early if no binaries were given

Error out if entry points are redeclared

Implement copy ctors for Function and BasicBlock
- Visual Studio ends up generating copy constructors that call deleted
  functions while compiling the linker code, while GCC and clang do not.
  So explicitly write those functions to avoid Visual Studio messing up.

Move removing duplicate capabilities to its own pass

Add functions running on all IDs present in an instruction

Remove duplicate SpvOpExtInstImport

Give default options value for link functions

Remove linkage capability if not making a library

Check types before allowing to link

Detect if two types/variables/functions have different decorations

Remove decorations of imported variables/functions and their types

Add a DecorationManager

Add a method for removing all decorations of id

Add methods for removing operands from instructions

Error out if one of the modules has a non-zero schema

Update README.md to talk about the linker

Do not freak out if an imported built-in variable has no export
2017-10-06 18:33:53 -04:00
GregF
9de4e69856 Add AggressiveDCEPass
Create aggressive dead code elimination pass
This pass eliminates unused code from functions. In addition,
it detects and eliminates code which may have spurious uses but which do
not contribute to the output of the function. The most common cause of
such code sequences is summations in loops whose result is no longer used
due to dead code elimination. This optimization has additional compile
time cost over standard dead code elimination.

This pass only processes entry point functions. It also only processes
shaders with logical addressing. It currently will not process functions
with function calls. It currently only supports the GLSL.std.450 extended
instruction set. It currently does not support any extensions.

This pass will be made more effective by first running passes that remove
dead control flow and inlines function calls.

This pass can be especially useful after running Local Access Chain
Conversion, which tends to cause cycles of dead code to be left after
Store/Load elimination passes are completed. These cycles cannot be
eliminated with standard dead code elimination.

Additionally: This transform uses a whitelist of instructions that it
knows do have side effects, (a.k.a. combinators).  It assumes other
instructions have side effects: it will not remove them, and assumes
they have side effects via their ID operands.
2017-07-10 11:30:25 -04:00
GregF
cc8bad3a5b Add LocalMultiStoreElim pass
A SSA local variable load/store elimination pass.
For every entry point function, eliminate all loads and stores of function
scope variables only referenced with non-access-chain loads and stores.
Eliminate the variables as well.

The presence of access chain references and function calls can inhibit
the above optimization.

Only shader modules with logical addressing are currently processed.
Currently modules with any extensions enabled are not processed. This
is left for future work.

This pass is most effective if preceeded by Inlining and
LocalAccessChainConvert. LocalSingleStoreElim and LocalSingleBlockElim
will reduce the work that this pass has to do.
2017-07-07 17:54:21 -04:00
Greg Fischer
bba812f4e4 Inline: Inline early return function if no returns in loop. 2017-05-12 17:18:00 -04:00
Greg Fischer
04fcc66743 Add exhaustive function call inlining to spirv-opt
Inlining is done for all functions designated as entry points.

Add optional validation to test fixture method SinglePassRunAndCheck.
2017-03-29 18:02:40 -04:00
David Srbecky
b85997a1df Add various accessors needed to read and edit SPIRV code. 2017-03-29 14:38:57 +01:00
David Neto
9fc8658ef3 Relicense SPIRV-Tools under Apache 2.0
Fixes https://github.com/KhronosGroup/SPIRV-Tools/issues/383

Finalize v2016.4
2016-09-02 10:00:29 -04:00
David Neto
d7b6362ed7 Add Module::ComputeIdBound
When IDs change, something should use this utility method
and Module::SetIdBound before writing out the binary.
2016-08-26 16:27:12 -04:00
David Neto
97fc6aa3b8 ForEachInst optionally runs on attached debug line insts
Also:
- Add const forms of ForEachInst
- Rewrite Module::ToBinary in terms of ForEachInst
- Add Instruction::ToBinaryWithoutAttachedDebugInsts
- Delete the ToBinary method on Function, BasicBlock, and Instruction
  since it can now be implemented with ForEachInst in a less confusing
  way, e.g. without recursion.
- Preserve debug line instructions on OpFunctionEnd (and store that
  instruction as a unique-pointer, for regularity).
2016-08-25 11:43:22 -04:00
David Neto
ccabcc4673 Add opt::ir::Module::SetIdBound 2016-08-23 15:20:34 -04:00
Lei Zhang
097ff25ea7 Allow OpUndef appearing in the type and global variable section.
Also clean up API functions for adding instructions into the
type and global values section.
2016-08-15 10:44:14 -04:00
qining
d065593404 Add iterator getter interface for types_values_ 2016-08-12 15:10:51 -04:00
Lei Zhang
95dc16d1ec Add make_range() & make_const_range() for creating iterator ranges. 2016-08-12 10:34:47 -04:00
Lei Zhang
4b3247feba Avoid non-oneliner definition in class and add missing iterators. 2016-08-12 10:34:47 -04:00
Lei Zhang
645ee1d9e0 Create an iterator class for in-memory representation. 2016-08-11 18:35:12 -04:00
Lei Zhang
c562e231e3 Optimization: Add type manager.
Type manager will construct a map of types gradually from
instructions.
2016-08-10 12:53:17 -04:00
Lei Zhang
80c94a4fa8 Change the interfaces of in-memory representation to use pointers.
Previously we use vectors of objects and move semantics to handle
ownership. That approach has the flaw that inserting an object into
the middle of a vector, which may trigger a vector reallocation,
can invalidate some addresses taken from instructions.

Now the in-memory representation internally uses vector of unique
pointers to handle ownership. Since objects are explicitly heap-
allocated now, pointers to them won't be invalidated by vector
resizing anymore.
2016-08-10 12:11:33 -04:00
qining
51a2484b36 Dead constant elimination
A pass to remove dead constants, including both front-end constants and spec
constants.

This pass does not handle dead variables and types.
2016-08-08 17:17:15 -04:00
Lei Zhang
dcf28bf6ce Allow missing memory model instructions in modules. 2016-07-29 00:58:09 -04:00
Lei Zhang
abf8f6413c Promote ir namespace and create draft libspirv.{h|c}pp. 2016-06-28 14:52:34 -04:00
Lei Zhang
8590f9cc81 Add IrBuilder for constructing SPIR-V in-memory representation. 2016-06-27 16:57:42 -04:00
Lei Zhang
3df8f7cebd Add classes for representing SPIR-V language constructs in memory. 2016-06-24 20:54:06 -04:00