Commit Graph

12 Commits

Author SHA1 Message Date
alan-baker
af01d57b5e
Update dominates to check for null nodes (#3271)
* Update dominates to check for null nodes

Fixes #3270
2020-04-02 08:19:54 -04:00
dan sinclair
eda2cfbe12
Cleanup includes. (#1795)
This Cl cleans up the include paths to be relative to the top level
directory. Various include-what-you-use fixes have been added.
2018-08-03 15:06:09 -04:00
dan sinclair
e477e7573e
Remove the module from opt::Function. (#1717)
The function class provides a {Set|Get}Parent call in order to provide
the context to the LoopDescriptor methods. This CL removes the module
from Function and provides the needed context directly to LoopDescriptor
on creation.
2018-07-12 14:42:05 -04:00
dan sinclair
2cce2c5b97
Move tests into namespaces (#1689)
This CL moves the test into namespaces based on their directories.
2018-07-11 09:24:49 -04:00
dan sinclair
e6b953361d
Move the ir namespace to opt. (#1680)
This CL moves the files in opt/ to consistenly be under the opt::
namespace. This frees up the ir:: namespace so it can be used to make a
shared ir represenation.
2018-07-09 11:32:29 -04:00
alan-baker
18ad1be7f9 Fixing MacOS compiler error 2018-05-15 12:23:27 -04:00
Stephen McGroarty
1c2cbaf569 Add GetContinueBlock to loop class.
Previously, the loop class used the terms latch and continue block
interchangeably. This patch splits the two and corrects and tests some
uses of the old uses of GetLatchBlock.
2018-05-03 14:30:41 -04:00
Victor Lomuller
3497a94460 Add loop unswitch pass.
It moves all conditional branching and switch whose conditions are loop
invariant and uniform. Before performing the loop unswitch we check that
the loop does not contain any instruction that would prevent it
(barriers, group instructions etc.).
2018-02-27 08:52:46 -05:00
Alexander Johnston
84ccd0b9ae Loop invariant code motion initial implementation 2018-02-08 22:55:47 -05:00
Victor Lomuller
50e85c865c Add LoopUtils class to gather some loop transformation support.
This patch adds LoopUtils class to handle some loop related transformations. For now it has 2 transformations that simplifies other transformations such as loop unroll or unswitch:
 - Dedicate exit blocks: this ensure that all exit basic block
   (out-of-loop basic blocks that have a predecessor in the loop)
   have all their predecessors in the loop;
 - Loop Closed SSA (LCSSA): this ensure that all definitions in a loop are used inside the loop
   or in a phi instruction in an exit basic block.

It also adds the following capabilities:
 - Loop::IsLCSSA to test if the loop is in a LCSSA form
 - Loop::GetOrCreatePreHeaderBlock that can build a loop preheader if required;
 - New methods to allow on the fly updates of the loop descriptors.
 - New methods to allow on the fly updates of the CFG analysis.
 - Instruction::SetOperand to allow expression of the index relative to Instruction::NumOperands (to be compatible with the index returned by DefUseManager::ForEachUse)
2018-02-01 15:35:09 -05:00
Victor Lomuller
6018de81de Add LoopDescriptor as an IRContext analysis.
Move some function definitions from header to source to avoid circular definition.
2018-01-25 16:12:32 -05:00
Victor Lomuller
e8ad02f3dd Add loop descriptors and some required dominator tree extensions.
Add post-order tree iterator.

Add DominatorTreeNode extensions:
 - Add begin/end methods to do pre-order and post-order tree traversal from a given DominatorTreeNode

Add DominatorTree extensions:
  - Add begin/end methods to do pre-order and post-order tree traversal
  - Tree traversal ignore by default the pseudo entry block
  - Retrieve a DominatorTreeNode from a basic block

Add loop descriptor:
  - Add a LoopDescriptor class to register all loops in a given function.
  - Add a Loop class to describe a loop:
    - Loop parent
    - Nested loops
    - Loop depth
    - Loop header, merge, continue and preheader
    - Basic blocks that belong to the loop

Correct a bug that forced dominator tree to be constantly rebuilt.
2018-01-08 09:31:13 -05:00