Web: Selectively remove a few key features, using #ifndef GLSLANG_WEB

Save about 100K.

N.B.: This is done by eliminating a function call, at a high level,
not by #ifdef'ing a bunch of code.

Also, removed no longer needed *_EXTENSION #ifdef in the code not
needed by GLSLANG_WEB.

SPIRV/GlslangToSpv.cpp

@@ -1592,9 +1592,11 @@ void TGlslangToSpvTraverser::finishSpv()
     for (auto it = iOSet.cbegin(); it != iOSet.cend(); ++it)
         entryPoint->addIdOperand(*it);
 
+#ifndef GLSLANG_WEB
     // Add capabilities, extensions, remove unneeded decorations, etc., 
     // based on the resulting SPIR-V.
     builder.postProcess();
+#endif
 }
 
 // Write the SPV into 'out'.

SPIRV/SpvBuilder.cpp

@@ -2089,6 +2089,7 @@ Id Builder::createTextureQueryCall(Op opCode, const TextureParameters& parameter
     if (parameters.lod)
         query->addIdOperand(parameters.lod);
     buildPoint->addInstruction(std::unique_ptr<Instruction>(query));
+    addCapability(CapabilityImageQuery);
 
     return query->getResultId();
 }

SPIRV/SpvPostProcess.cpp

@@ -51,12 +51,8 @@ namespace spv {
     #include "GLSL.std.450.h"
     #include "GLSL.ext.KHR.h"
     #include "GLSL.ext.EXT.h"
-#ifdef AMD_EXTENSIONS
     #include "GLSL.ext.AMD.h"
-#endif
-#ifdef NV_EXTENSIONS
     #include "GLSL.ext.NV.h"
-#endif
 }
 
 namespace spv {
@@ -160,7 +156,6 @@ void Builder::postProcessType(const Instruction& inst, Id typeId)
         }
         break;
     case OpExtInst:
-#if AMD_EXTENSIONS
         switch (inst.getImmediateOperand(1)) {
         case GLSLstd450Frexp:
         case GLSLstd450FrexpStruct:
@@ -176,7 +171,6 @@ void Builder::postProcessType(const Instruction& inst, Id typeId)
         default:
             break;
         }
-#endif
         break;
     default:
         if (basicTypeOp == OpTypeFloat && width == 16)
@@ -222,12 +216,10 @@ void Builder::postProcess(Instruction& inst)
         addCapability(CapabilityImageQuery);
         break;
 
-#ifdef NV_EXTENSIONS
     case OpGroupNonUniformPartitionNV:
         addExtension(E_SPV_NV_shader_subgroup_partitioned);
         addCapability(CapabilityGroupNonUniformPartitionedNV);
         break;
-#endif
 
     case OpLoad:
     case OpStore:

SPIRV/disassemble.cpp

@@ -52,26 +52,16 @@ namespace spv {
     extern "C" {
         // Include C-based headers that don't have a namespace
         #include "GLSL.std.450.h"
-#ifdef AMD_EXTENSIONS
         #include "GLSL.ext.AMD.h"
-#endif
-
-#ifdef NV_EXTENSIONS
         #include "GLSL.ext.NV.h"
-#endif
     }
 }
 const char* GlslStd450DebugNames[spv::GLSLstd450Count];
 
 namespace spv {
 
-#ifdef AMD_EXTENSIONS
 static const char* GLSLextAMDGetDebugNames(const char*, unsigned);
-#endif
-
-#ifdef NV_EXTENSIONS
 static const char* GLSLextNVGetDebugNames(const char*, unsigned);
-#endif
 
 static void Kill(std::ostream& out, const char* message)
 {
@@ -82,15 +72,8 @@ static void Kill(std::ostream& out, const char* message)
 // used to identify the extended instruction library imported when printing
 enum ExtInstSet {
     GLSL450Inst,
-
-#ifdef AMD_EXTENSIONS
     GLSLextAMDInst,
-#endif
-
-#ifdef NV_EXTENSIONS
     GLSLextNVInst,
-#endif
-
     OpenCLExtInst,
 };
 
@@ -499,37 +482,29 @@ void SpirvStream::disassembleInstruction(Id resultId, Id /*typeId*/, Op opCode,
                 const char* name = idDescriptor[stream[word - 2]].c_str();
                 if (0 == memcmp("OpenCL", name, 6)) {
                     extInstSet = OpenCLExtInst;
-#ifdef AMD_EXTENSIONS
                 } else if (strcmp(spv::E_SPV_AMD_shader_ballot, name) == 0 ||
                            strcmp(spv::E_SPV_AMD_shader_trinary_minmax, name) == 0 ||
                            strcmp(spv::E_SPV_AMD_shader_explicit_vertex_parameter, name) == 0 ||
                            strcmp(spv::E_SPV_AMD_gcn_shader, name) == 0) {
                     extInstSet = GLSLextAMDInst;
-#endif
-#ifdef NV_EXTENSIONS
-                }else if (strcmp(spv::E_SPV_NV_sample_mask_override_coverage, name) == 0 ||
+                } else if (strcmp(spv::E_SPV_NV_sample_mask_override_coverage, name) == 0 ||
                           strcmp(spv::E_SPV_NV_geometry_shader_passthrough, name) == 0 ||
                           strcmp(spv::E_SPV_NV_viewport_array2, name) == 0 ||
                           strcmp(spv::E_SPV_NVX_multiview_per_view_attributes, name) == 0 || 
                           strcmp(spv::E_SPV_NV_fragment_shader_barycentric, name) == 0 ||
                           strcmp(spv::E_SPV_NV_mesh_shader, name) == 0) {
                     extInstSet = GLSLextNVInst;
-#endif
                 }
                 unsigned entrypoint = stream[word - 1];
                 if (extInstSet == GLSL450Inst) {
                     if (entrypoint < GLSLstd450Count) {
                         out << "(" << GlslStd450DebugNames[entrypoint] << ")";
                     }
-#ifdef AMD_EXTENSIONS
                 } else if (extInstSet == GLSLextAMDInst) {
                     out << "(" << GLSLextAMDGetDebugNames(name, entrypoint) << ")";
-#endif
-#ifdef NV_EXTENSIONS
                 }
                 else if (extInstSet == GLSLextNVInst) {
                     out << "(" << GLSLextNVGetDebugNames(name, entrypoint) << ")";
-#endif
                 }
             }
             break;
@@ -653,7 +628,6 @@ static void GLSLstd450GetDebugNames(const char** names)
     names[GLSLstd450NClamp]                  = "NClamp";
 }
 
-#ifdef AMD_EXTENSIONS
 static const char* GLSLextAMDGetDebugNames(const char* name, unsigned entrypoint)
 {
     if (strcmp(name, spv::E_SPV_AMD_shader_ballot) == 0) {
@@ -695,9 +669,7 @@ static const char* GLSLextAMDGetDebugNames(const char* name, unsigned entrypoint
 
     return "Bad";
 }
-#endif
 
-#ifdef NV_EXTENSIONS
 static const char* GLSLextNVGetDebugNames(const char* name, unsigned entrypoint)
 {
     if (strcmp(name, spv::E_SPV_NV_sample_mask_override_coverage) == 0 ||
@@ -751,7 +723,6 @@ static const char* GLSLextNVGetDebugNames(const char* name, unsigned entrypoint)
     }
     return "Bad";
 }
-#endif
 
 void Disassemble(std::ostream& out, const std::vector<unsigned int>& stream)
 {