re-re-land of skslc now automatically turns on derivatives support

Only change from last attempt is putting the call to shaderDerivativeExtensionString behind a check for shaderDerivativeSupport to avoid a spurious assertion failure.

TBR=benjaminwagner@google.com

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2437063002

Review-Url: https://chromiumcodereview.appspot.com/2437063002

3 files changed, 22 insertions, 0 deletions

diff --git a/src/sksl/ir/SkSLFunctionDeclaration.h b/src/sksl/ir/SkSLFunctionDeclaration.h
index 16a184a6d7..ffde0c66c1 100644
--- a/src/sksl/ir/SkSLFunctionDeclaration.h
+++ b/src/sksl/ir/SkSLFunctionDeclaration.h
@@ -24,6 +24,7 @@ struct FunctionDeclaration : public Symbol {
                         std::vector<const Variable*> parameters, const Type& returnType)
     : INHERITED(position, kFunctionDeclaration_Kind, std::move(name))
     , fDefined(false)
+    , fBuiltin(false)
     , fParameters(std::move(parameters))
     , fReturnType(returnType) {}
 
@@ -55,6 +56,7 @@ struct FunctionDeclaration : public Symbol {
     }
 
     mutable bool fDefined;
+    bool fBuiltin;
     const std::vector<const Variable*> fParameters;
     const Type& fReturnType;
 
diff --git a/src/sksl/ir/SkSLSymbolTable.cpp b/src/sksl/ir/SkSLSymbolTable.cpp
index 9d8c0063c5..6d8e9a7ea6 100644
--- a/src/sksl/ir/SkSLSymbolTable.cpp
+++ b/src/sksl/ir/SkSLSymbolTable.cpp
@@ -97,4 +97,22 @@ void SymbolTable::addWithoutOwnership(const std::string& name, const Symbol* sym
     }
 }
 
+
+void SymbolTable::markAllFunctionsBuiltin() {
+    for (const auto& pair : fSymbols) {
+        switch (pair.second->fKind) {
+            case Symbol::kFunctionDeclaration_Kind:
+                ((FunctionDeclaration&) *pair.second).fBuiltin = true;
+                break;
+            case Symbol::kUnresolvedFunction_Kind:
+                for (auto& f : ((UnresolvedFunction&) *pair.second).fFunctions) {
+                    ((FunctionDeclaration*) f)->fBuiltin = true;
+                }
+                break;
+            default:
+                break;
+        }
+    }
+}
+
 } // namespace
diff --git a/src/sksl/ir/SkSLSymbolTable.h b/src/sksl/ir/SkSLSymbolTable.h
index d732023ff0..be2b49c48d 100644
--- a/src/sksl/ir/SkSLSymbolTable.h
+++ b/src/sksl/ir/SkSLSymbolTable.h
@@ -39,6 +39,8 @@ public:
 
     Symbol* takeOwnership(Symbol* s);
 
+    void markAllFunctionsBuiltin();
+
     const std::shared_ptr<SymbolTable> fParent;
 
 private: