add SpecConstantOpModeGuard to GlslangToSpvTraverser::visitSymbol()

SPIRV/GlslangToSpv.cpp

@@ -778,6 +778,10 @@ TGlslangToSpvTraverser::~TGlslangToSpvTraverser()
 //
 void TGlslangToSpvTraverser::visitSymbol(glslang::TIntermSymbol* symbol)
 {
+    SpecConstantOpModeGuard spec_constant_op_mode_setter(&builder);
+    if (symbol->getType().getQualifier().isSpecConstant())
+        spec_constant_op_mode_setter.turnOnSpecConstantOpMode();
+
     // getSymbolId() will set up all the IO decorations on the first call.
     // Formal function parameters were mapped during makeFunctions().
     spv::Id id = getSymbolId(symbol);

Test/baseResults/spv.specConstantOperations.vert.out

@@ -112,15 +112,15 @@ Linked vertex stage:
               98:   68(ivec4) ConstantComposite 97 97 97 97
               99:   68(ivec4) SpecConstantOp 198 71 98
              100:     25(int) Constant 0
+             101:      6(int) SpecConstantOp 81 67 0
              102:             TypeVector 6(int) 2
+             103:  102(ivec2) SpecConstantOp 79 67 67 1(GLSL.std.450) 0
              104:             TypeVector 6(int) 3
+             105:  104(ivec3) SpecConstantOp 79 67 67 2 1(GLSL.std.450) 0
+             106:   65(ivec4) SpecConstantOp 79 67 67 1(GLSL.std.450) 2 0 3
          4(main):           2 Function None 3
                5:             Label
                               Return
-             101:      6(int) CompositeExtract 67 0
-             103:  102(ivec2) VectorShuffle 67 67 1 0
-             105:  104(ivec3) VectorShuffle 67 67 2 1 0
-             106:   65(ivec4) VectorShuffle 67 67 1 2 0 3
                               FunctionEnd
 8(non_const_array_size_from_spec_const():      6(int) Function None 7
                9:             Label