Hash :
d7aa0130
Author :
Date :
2021-04-26T16:56:15
Upstream Apple's direct-to-Metal backend: compile translator. This change is meant to merge the translator changes from Apple's direct-to-Metal backend. Taken from Kyle Piddington's CL: https://chromium-review.googlesource.com/c/angle/angle/+/2857366/ The goal of this CL is to merge the translator code in a state that compiles, but not to switch the Metal backend over to use this translator backend yet. Bug: angleproject:5505 Change-Id: I68a6354604498cd5fd1eb96c13fc56f3b38f2bd0 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2897536 Reviewed-by: Jonah Ryan-Davis <jonahr@google.com> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96
//
// Copyright 2020 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "compiler/translator/TranslatorMetalDirect/HoistConstants.h"
#include "compiler/translator/TranslatorMetalDirect/AstHelpers.h"
#include "compiler/translator/TranslatorMetalDirect/IntermRebuild.h"
#include "compiler/translator/TranslatorMetalDirect/Layout.h"
#include "compiler/translator/tree_util/FindFunction.h"
#include "compiler/translator/tree_util/ReplaceVariable.h"
using namespace sh;
////////////////////////////////////////////////////////////////////////////////
namespace
{
class Rewriter : private TIntermRebuild
{
private:
const size_t mMinRequiredSize;
TIntermSequence mHoistedDeclNodes;
public:
Rewriter(TCompiler &compiler, size_t minRequiredSize)
: TIntermRebuild(compiler, true, false), mMinRequiredSize(minRequiredSize)
{}
PreResult visitDeclarationPre(TIntermDeclaration &declNode) override
{
if (getParentFunction())
{
Declaration decl = ViewDeclaration(declNode);
const TType &type = decl.symbol.getType();
if (type.getQualifier() == TQualifier::EvqConst)
{
if (decl.initExpr && decl.initExpr->hasConstantValue())
{
const size_t size = MetalLayoutOf(type).sizeOf;
if (size >= mMinRequiredSize)
{
mHoistedDeclNodes.push_back(&declNode);
return nullptr;
}
}
}
}
return {declNode, VisitBits::Neither};
}
bool rewrite(TIntermBlock &root, IdGen &idGen)
{
if (!rebuildRoot(root))
{
return false;
}
if (mHoistedDeclNodes.empty())
{
return true;
}
root.insertChildNodes(FindFirstFunctionDefinitionIndex(&root), mHoistedDeclNodes);
for (TIntermNode *opaqueDeclNode : mHoistedDeclNodes)
{
TIntermDeclaration *declNode = opaqueDeclNode->getAsDeclarationNode();
ASSERT(declNode);
const TVariable &oldVar = ViewDeclaration(*declNode).symbol.variable();
const Name newName = idGen.createNewName(oldVar.name());
auto *newVar = new TVariable(&mSymbolTable, newName.rawName(), &oldVar.getType(),
newName.symbolType());
if (!ReplaceVariable(&mCompiler, &root, &oldVar, newVar))
{
return false;
}
}
return true;
}
};
} // anonymous namespace
////////////////////////////////////////////////////////////////////////////////
bool sh::HoistConstants(TCompiler &compiler,
TIntermBlock &root,
IdGen &idGen,
size_t minRequiredSize)
{
return Rewriter(compiler, minRequiredSize).rewrite(root, idGen);
}