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Use GLSLANG_ANGLE to strip features to what ANGLE requires

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This change strips a few features similar to GLSLANG_WEB but doesn't
remove every detail like the latter.  It also hardcodes profile/version
to core/450.

In particular, TBuiltIns::initialize is specialized to remove most of
what is not supported or won't be supported by ANGLE.  The result of
this function is parsed with TParseContext::parseShaderStrings which is
a performance bottleneck.

This change shaves about 300KB off of ANGLE's binary size and reduces
the cost of SetupBuiltinSymbolTable to nearly a sixth.

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
This commit is contained in:
Shahbaz Youssefi 2020-07-03 15:42:53 -04:00
parent f5ed7a69d5
commit 8c49d15fbf
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GPG key ID: C6149357EC6727E0
17 changed files with 215 additions and 103 deletions
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6
glslang/MachineIndependent/linkValidate.cpp
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@ -82,7 +82,7 @@ void TIntermediate::warn(TInfoSink& infoSink, const char* message)
//
void TIntermediate::merge(TInfoSink& infoSink, TIntermediate& unit)
{
#ifndef GLSLANG_WEB
#if !defined(GLSLANG_WEB) && !defined(GLSLANG_ANGLE)
mergeCallGraphs(infoSink, unit);
mergeModes(infoSink, unit);
mergeTrees(infoSink, unit);
@ -104,7 +104,7 @@ void TIntermediate::mergeCallGraphs(TInfoSink& infoSink, TIntermediate& unit)
callGraph.insert(callGraph.end(), unit.callGraph.begin(), unit.callGraph.end());
}
#ifndef GLSLANG_WEB
#if !defined(GLSLANG_WEB) && !defined(GLSLANG_ANGLE)
#define MERGE_MAX(member) member = std::max(member, unit.member)
#define MERGE_TRUE(member) if (unit.member) member = unit.member;
@ -533,7 +533,7 @@ void TIntermediate::mergeImplicitArraySizes(TType& type, const TType& unitType)
//
void TIntermediate::mergeErrorCheck(TInfoSink& infoSink, const TIntermSymbol& symbol, const TIntermSymbol& unitSymbol, bool crossStage)
{
#ifndef GLSLANG_WEB
#if !defined(GLSLANG_WEB) && !defined(GLSLANG_ANGLE)
bool writeTypeComparison = false;
// Types have to match