Ensure the dominance calculation visits all nodes in the CFG.
The successor list of the pseudo-entry node is augmented with
a single node in each cycle that otherwise would not be visited.
Similarly, the predecssors list of the pseduo-exit node is augmented
with the a single node in each cycle that otherwise would not
be visited.
Pulls DepthFirstSearch out so it's accessible outside of the dominator
calculation.
Fixes https://github.com/KhronosGroup/SPIRV-Tools/issues/279
Add a pass to freeze spec constants to their default values. This pass does
not fold the frozen spec constants and does not handle SpecConstantOp
instructions and SpecConstantComposite instructions.
* Creates an ID class which manages definition and use of IDs
* Moved tracking code from validate.cpp to validate_id.cpp
* Rename and combine SsaPass and ProcessIds into IdPass
* Remove module dependency in Function
* The `Input` StorageClass doesn't require the `Shader` capability
anymore.
* The `Sampled1D` and `SampledBuffer` capabilities don't require
the `Shader` capability anymore. So they do not indirectly
depend on the `Matrix` capability. So are the `Image1D` and
`ImageBuffer` capabilities, which depend on `Sampled1D` and
`SampledBuffer`.
A new GLSL grammar file is uploaded for SPIR-V 1.1, but it's the
same as the existing one for SPIR-V 1.0.
Now tracking commit 3814effb879ab5a98a7b9288a4b4c7849d2bc8ac in
SPIRV-Headers.
For DependencyInfinite and DependencyLength, test
that they don't require a capability to be turned on.
Also, that they are assembled, binary parsed, and disassembled
correctly.
Works around issue 248 by weakening the test:
https://github.com/KhronosGroup/SPIRV-Tools/issues/248
The validator should try to track (32-bit) constant values, and then
for capability checks on IDs, check the referenced value, not the
raw ID number.
For dominance calculations we use an "augmented" CFG
where we always add a pseudo-entry node that is the predecessor
in the augmented CFG to any nodes that have no predecessors in the
regular CFG. Similarly, we add a pseudo-exit node that is the
predecessor in the augmented CFG that is a successor to any
node that has no successors in the regular CFG.
Pseudo entry and exit blocks live in the Function object.
Fixes a subtle problem where we were implicitly creating
the block_details for the pseudo-exit node since it didn't
appear in the idoms map, and yet we referenced it. In such a case the
contents of the block details could be garbage, or zero-initialized.
That sometimes caused incorrect calculation of immediate dominators
and post-dominators. For example, on a debug build where the details
could be zero-initialized, the dominator of an unreachable block would
be given as the pseudo-exit node. Bizarre.
Also, enforce the rule that you must have an OpFunctionEnd to close off
the last function.
The operands following the extended instruction literal
number are determined by the extended instruction itself.
So drop the zero-or-more IdRef pattern at the end of OpExtInst.
It's arguable whether this should actually be a grammar fix. I've
chosen to patch this in SPIRV-Tools instead of in the grammar file.
Fixes https://github.com/KhronosGroup/SPIRV-Tools/issues/233
Also fix two test cases for OpenCL extended instructions. These
errors of supplying too many operands are now detected.
Refactor the way the post order vector is created. This new method
will allow for the extraction of backedges and create the post order
vector in one pass.
