Revert of Turned on SkSL->GLSL compiler

src/sksl/SkSLSPIRVCodeGenerator.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
  
 #include "SkSLSPIRVCodeGenerator.h"
 
 #include "string.h"
 
 #include "GLSL.std.450.h"
 
 #include "ir/SkSLExpressionStatement.h"
 #include "ir/SkSLExtension.h"
 #include "ir/SkSLIndexExpression.h"
 #include "ir/SkSLVariableReference.h"
-#include "SkSLCompiler.h"
 
 namespace SkSL {
 
 #define SPIRV_DEBUG 0
 
 static const int32_t SKSL_MAGIC  = 0x0; // FIXME: we should probably register a magic number
 
 void SPIRVCodeGenerator::setupIntrinsics() {
 #define ALL_GLSL(x) std::make_tuple(kGLSL_STD_450_IntrinsicKind, GLSLstd450 ## x, GLSLstd450 ## x, \
                                     GLSLstd450 ## x, GLSLstd450 ## x)
@@ skipping 2286 matching lines @@
                                fDecorationBuffer);
     }
     if (layout.fIndex >= 0) {
         this->writeInstruction(SpvOpDecorate, target, SpvDecorationIndex, layout.fIndex, 
                                fDecorationBuffer);
     }
     if (layout.fSet >= 0) {
         this->writeInstruction(SpvOpDecorate, target, SpvDecorationDescriptorSet, layout.fSet, 
                                fDecorationBuffer);
     }
-    if (layout.fBuiltin >= 0 && layout.fBuiltin != SK_FRAGCOLOR_BUILTIN) {
+    if (layout.fBuiltin >= 0) {
         this->writeInstruction(SpvOpDecorate, target, SpvDecorationBuiltIn, layout.fBuiltin, 
                                fDecorationBuffer);
     }
 }
 
 void SPIRVCodeGenerator::writeLayout(const Layout& layout, SpvId target, int member) {
     if (layout.fLocation >= 0) {
         this->writeInstruction(SpvOpMemberDecorate, target, member, SpvDecorationLocation, 
                                layout.fLocation, fDecorationBuffer);
     }
@@ skipping 21 matching lines @@
     this->writeInstruction(SpvOpDecorate, type, SpvDecorationBlock, fDecorationBuffer);
     SpvStorageClass_ storageClass = get_storage_class(intf.fVariable.fModifiers);
     SpvId ptrType = this->nextId();
     this->writeInstruction(SpvOpTypePointer, ptrType, storageClass, type, fConstantBuffer);
     this->writeInstruction(SpvOpVariable, ptrType, result, storageClass, fConstantBuffer);
     this->writeLayout(intf.fVariable.fModifiers.fLayout, result);
     fVariableMap[&intf.fVariable] = result;
     return result;
 }
 
-#define BUILTIN_IGNORE 9999
-void SPIRVCodeGenerator::writeGlobalVars(Program::Kind kind, const VarDeclarations& decl, 
-                                         std::ostream& out) {
+void SPIRVCodeGenerator::writeGlobalVars(const VarDeclarations& decl, std::ostream& out) {
     for (size_t i = 0; i < decl.fVars.size(); i++) {
         const VarDeclaration& varDecl = decl.fVars[i];
         const Variable* var = varDecl.fVar;
-        if (var->fModifiers.fLayout.fBuiltin == BUILTIN_IGNORE) {
-            continue;
-        }
-        if (var->fModifiers.fLayout.fBuiltin == SK_FRAGCOLOR_BUILTIN &&
-            kind != Program::kFragment_Kind) {
-            continue;
-        }
         if (!var->fIsReadFrom && !var->fIsWrittenTo &&
                 !(var->fModifiers.fFlags & (Modifiers::kIn_Flag |
                                             Modifiers::kOut_Flag |
                                             Modifiers::kUniform_Flag))) {
             // variable is dead and not an input / output var (the Vulkan debug layers complain if
             // we elide an interface var, even if it's dead)
             continue;
         }
         SpvStorageClass_ storageClass;
         if (var->fModifiers.fFlags & Modifiers::kIn_Flag) {
@@ skipping 175 matching lines @@
             InterfaceBlock& intf = (InterfaceBlock&) *program.fElements[i];
             SpvId id = this->writeInterfaceBlock(intf);
             if ((intf.fVariable.fModifiers.fFlags & Modifiers::kIn_Flag) ||
                 (intf.fVariable.fModifiers.fFlags & Modifiers::kOut_Flag)) {
                 interfaceVars.push_back(id);
             }
         }
     }
     for (size_t i = 0; i < program.fElements.size(); i++) {
         if (program.fElements[i]->fKind == ProgramElement::kVar_Kind) {
-            this->writeGlobalVars(program.fKind, ((VarDeclarations&) *program.fElements[i]), 
-                                  body);
+            this->writeGlobalVars(((VarDeclarations&) *program.fElements[i]), body);
         }
     }
     for (size_t i = 0; i < program.fElements.size(); i++) {
         if (program.fElements[i]->fKind == ProgramElement::kFunction_Kind) {
             this->writeFunction(((FunctionDefinition&) *program.fElements[i]), body);
         }
     }
     const FunctionDeclaration* main = nullptr;
     for (auto entry : fFunctionMap) {
         if (entry.first->fName == "main") {
@@ skipping 53 matching lines @@
     this->writeWord(SpvVersion, out);
     this->writeWord(SKSL_MAGIC, out);
     std::stringstream buffer;
     this->writeInstructions(program, buffer);
     this->writeWord(fIdCount, out);
     this->writeWord(0, out); // reserved, always zero
     out << buffer.str();
 }
 
 }