Commit Graph

4 Commits

Author SHA1 Message Date
Steven Perron
82663f34c9
Check for unreachable blocks in merge-return. (#1966)
Merge return assumes that the only unreachable blocks are those needed
to keep the structured cfg valid.  Even those must be essentially empty
blocks.

If this is not the case, we get unpredictable behaviour.  This commit
add a check in merge return, and emits an error if it is not the case.

Added a pass of dead branch elimination before merge return in both the
performance and size passes.  It is a precondition of merge return.

Fixes #1962.
2018-10-10 15:18:15 -04:00
Steven Perron
0e5fc7d75e
Allow 0 as argument to scalar replacement. (#1917)
A limit of 0 for the scalar replacement options it used to indicate that
there is no limit.  The current implementation does not allow 0.  This
should be fixed.
2018-09-26 09:58:28 -04:00
Steven Perron
9fbcce4ca1
Add unrolling to the legalization passes (#1903)
Adds unrolling to the legalization passes.

After enabling unrolling I found a bug when there is a self-referencing
phi node.  That has been fixed.

The test that checks for that the order of optimizations is correct also
needed to be updated.
2018-09-19 16:40:09 -04:00
Diego Novillo
03000a3a38 Add testing framework for tools.
This forks the testing harness from https://github.com/google/shaderc
to allow testing CLI tools.

New features needed for SPIRV-Tools include:

1- A new PlaceHolder subclass for spirv shaders.  This place holder
   calls spirv-as to convert assembly input into SPIRV bytecode. This is
   required for most tools in SPIRV-Tools.

2- A minimal testing file for testing basic functionality of spirv-opt.

Add tests for all flags in spirv-opt.

1. Adds tests to check that known flags match the names that each pass
   advertises.
2. Adds tests to check that -O, -Os and --legalize-hlsl schedule the
   expected passes.
3. Adds more functionality to Expect classes to support regular
   expression matching on stderr.
4. Add checks for integer arguments to optimization flags.
5. Fixes #1817 by modifying the parsing of integer arguments in
   flags that take them.
6. Fixes -Oconfig file parsing (#1778). It reads every line of the file
   into a string and then parses that string by tokenizing every group of
   characters between whitespaces (using the standard cin reading
   operator).  This mimics shell command-line parsing, but it does not
   support quoting (and I'm not planning to).
2018-08-17 15:03:14 -04:00