Web: Remove unused stage functionality, SPIR-V logger, and hex_utils

Saves another 20K.

Test/baseResults/size

@@ -1 +1 @@
-812032 ../build/install/bin/glslangValidator.exe
+601088 ../build/install/bin/glslangValidator.exe

Test/baseResults/spv.hlslDebugInfo.frag.out

@@ -15,12 +15,12 @@ spv.hlslDebugInfo.vert
 // OpModuleProcessed shift-UBO-binding 6
 // OpModuleProcessed shift-ssbo-binding 3
 // OpModuleProcessed shift-uav-binding 5
-// OpModuleProcessed flatten-uniform-arrays
 // OpModuleProcessed no-storage-format
 // OpModuleProcessed resource-set-binding t0 0 0
-// OpModuleProcessed hlsl-iomap
 // OpModuleProcessed auto-map-bindings
 // OpModuleProcessed auto-map-locations
+// OpModuleProcessed flatten-uniform-arrays
+// OpModuleProcessed hlsl-iomap
 // OpModuleProcessed client vulkan100
 // OpModuleProcessed target-env vulkan1.0
 // OpModuleProcessed source-entrypoint origMain

Test/baseResults/web.builtins.vert.out

@@ -1,74 +1,62 @@
 ; SPIR-V
 ; Version: 1.0
 ; Generator: Khronos Glslang Reference Front End; 7
-; Bound: 42
+; Bound: 33
 ; Schema: 0
                OpCapability Shader
           %1 = OpExtInstImport "GLSL.std.450"
                OpMemoryModel Logical GLSL450
-               OpEntryPoint Vertex %main "main" %_ %ps %gl_VertexIndex %gl_InstanceIndex
+               OpEntryPoint Vertex %main "main" %gl_Position %ps %gl_VertexIndex %gl_PointSize %gl_InstanceIndex
                OpSource ESSL 310
                OpName %main "main"
-               OpName %gl_PerVertex "gl_PerVertex"
-               OpMemberName %gl_PerVertex 0 "gl_Position"
-               OpMemberName %gl_PerVertex 1 "gl_PointSize"
-               OpName %_ ""
+               OpName %gl_Position "gl_Position"
                OpName %ps "ps"
                OpName %gl_VertexIndex "gl_VertexIndex"
+               OpName %gl_PointSize "gl_PointSize"
                OpName %gl_InstanceIndex "gl_InstanceIndex"
-               OpMemberDecorate %gl_PerVertex 0 Invariant
-               OpMemberDecorate %gl_PerVertex 0 BuiltIn Position
-               OpMemberDecorate %gl_PerVertex 1 BuiltIn PointSize
-               OpDecorate %gl_PerVertex Block
+               OpDecorate %gl_Position Invariant
+               OpDecorate %gl_Position BuiltIn Position
                OpDecorate %ps RelaxedPrecision
                OpDecorate %ps Location 0
-               OpDecorate %15 RelaxedPrecision
+               OpDecorate %12 RelaxedPrecision
                OpDecorate %gl_VertexIndex BuiltIn VertexIndex
-               OpDecorate %30 RelaxedPrecision
+               OpDecorate %gl_PointSize BuiltIn PointSize
+               OpDecorate %25 RelaxedPrecision
                OpDecorate %gl_InstanceIndex BuiltIn InstanceIndex
        %void = OpTypeVoid
           %3 = OpTypeFunction %void
       %float = OpTypeFloat 32
     %v4float = OpTypeVector %float 4
-%gl_PerVertex = OpTypeStruct %v4float %float
-%_ptr_Output_gl_PerVertex = OpTypePointer Output %gl_PerVertex
-          %_ = OpVariable %_ptr_Output_gl_PerVertex Output
-        %int = OpTypeInt 32 1
-      %int_0 = OpConstant %int 0
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+%gl_Position = OpVariable %_ptr_Output_v4float Output
 %_ptr_Input_float = OpTypePointer Input %float
          %ps = OpVariable %_ptr_Input_float Input
-%_ptr_Output_v4float = OpTypePointer Output %v4float
+        %int = OpTypeInt 32 1
       %int_4 = OpConstant %int 4
 %_ptr_Input_int = OpTypePointer Input %int
 %gl_VertexIndex = OpVariable %_ptr_Input_int Input
-      %int_1 = OpConstant %int 1
 %_ptr_Output_float = OpTypePointer Output %float
+%gl_PointSize = OpVariable %_ptr_Output_float Output
       %int_5 = OpConstant %int 5
 %gl_InstanceIndex = OpVariable %_ptr_Input_int Input
        %main = OpFunction %void None %3
           %5 = OpLabel
-         %15 = OpLoad %float %ps
-         %16 = OpCompositeConstruct %v4float %15 %15 %15 %15
-         %18 = OpAccessChain %_ptr_Output_v4float %_ %int_0
-               OpStore %18 %16
-         %22 = OpLoad %int %gl_VertexIndex
-         %23 = OpISub %int %int_4 %22
-         %24 = OpConvertSToF %float %23
-         %25 = OpAccessChain %_ptr_Output_v4float %_ %int_0
-         %26 = OpLoad %v4float %25
-         %27 = OpVectorTimesScalar %v4float %26 %24
-         %28 = OpAccessChain %_ptr_Output_v4float %_ %int_0
-               OpStore %28 %27
-         %30 = OpLoad %float %ps
-         %32 = OpAccessChain %_ptr_Output_float %_ %int_1
-               OpStore %32 %30
-         %35 = OpLoad %int %gl_InstanceIndex
-         %36 = OpISub %int %int_5 %35
-         %37 = OpConvertSToF %float %36
-         %38 = OpAccessChain %_ptr_Output_float %_ %int_1
-         %39 = OpLoad %float %38
-         %40 = OpFMul %float %39 %37
-         %41 = OpAccessChain %_ptr_Output_float %_ %int_1
-               OpStore %41 %40
+         %12 = OpLoad %float %ps
+         %13 = OpCompositeConstruct %v4float %12 %12 %12 %12
+               OpStore %gl_Position %13
+         %18 = OpLoad %int %gl_VertexIndex
+         %19 = OpISub %int %int_4 %18
+         %20 = OpConvertSToF %float %19
+         %21 = OpLoad %v4float %gl_Position
+         %22 = OpVectorTimesScalar %v4float %21 %20
+               OpStore %gl_Position %22
+         %25 = OpLoad %float %ps
+               OpStore %gl_PointSize %25
+         %28 = OpLoad %int %gl_InstanceIndex
+         %29 = OpISub %int %int_5 %28
+         %30 = OpConvertSToF %float %29
+         %31 = OpLoad %float %gl_PointSize
+         %32 = OpFMul %float %31 %30
+               OpStore %gl_PointSize %32
                OpReturn
                OpFunctionEnd