mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-29 22:41:03 +00:00
2d2a512691
* Move ProcessFunction* function from pass to the context. There are a few functions that are used to traverse the call tree. They currently live in the Pass class, but they have nothing to do with a pass, and may be needed outside of a pass. They would be better in the ir context, or in a specific call tree class if we ever have a need for it. * Don't inline recursive functions. Inlining does not check if a function is recursive or not. This has been fine as long as the shader was a Vulkan shader, which forbid recursive functions. However, not all shaders are vulkan, so either we limit inlining to Vulkan shaders or we teach it to look for recursive functions. I prefer to keep the passes as general as is reasonable. The change does not require much new code in inlining and gives a reason to refactor some other code. The changes are to add a member function to the Function class that checks if that function is recursive or not. Then this is used in inlining to not inlining a function call if it calls a recursive function. * Add id to function analysis There are a few places that build a map from ids to Function whose result is that id. I decided to add an analysis to the context for this to reduce that code, and simplify some of the functions. * Add missing file.
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
// Copyright (c) 2017 Google Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// This file implements a pass to cleanup the CFG to remove superfluous
|
|
// constructs (e.g., unreachable basic blocks, empty control flow structures,
|
|
// etc)
|
|
|
|
#include <queue>
|
|
#include <unordered_set>
|
|
|
|
#include "source/opt/cfg_cleanup_pass.h"
|
|
|
|
#include "source/opt/function.h"
|
|
#include "source/opt/module.h"
|
|
|
|
namespace spvtools {
|
|
namespace opt {
|
|
|
|
Pass::Status CFGCleanupPass::Process() {
|
|
// Process all entry point functions.
|
|
ProcessFunction pfn = [this](Function* fp) { return CFGCleanup(fp); };
|
|
bool modified = context()->ProcessReachableCallTree(pfn);
|
|
return modified ? Pass::Status::SuccessWithChange
|
|
: Pass::Status::SuccessWithoutChange;
|
|
}
|
|
|
|
} // namespace opt
|
|
} // namespace spvtools
|