SPV: Issue #180: push_constants don't have descriptor sets.

SPIRV/GlslangToSpv.cpp

@@ -521,9 +521,9 @@ spv::ImageFormat TGlslangToSpvTraverser::TranslateImageFormat(const glslang::TTy
 // descriptor set.
 bool IsDescriptorResource(const glslang::TType& type)
 {
-    // uniform and buffer blocks are included
+    // uniform and buffer blocks are included, unless it is a push_constant
     if (type.getBasicType() == glslang::EbtBlock)
-        return type.getQualifier().isUniformOrBuffer();
+        return type.getQualifier().isUniformOrBuffer() && ! type.getQualifier().layoutPushConstant;
 
     // non block...
     // basically samplerXXX/subpass/sampler/texture are all included

Test/baseResults/spv.pushConstant.vert.out

@@ -24,7 +24,6 @@ Linked vertex stage:
                               MemberDecorate 11(Material) 0 Offset 0
                               MemberDecorate 11(Material) 1 Offset 4
                               Decorate 11(Material) Block
-                              Decorate 13(matInst) DescriptorSet 0
                2:             TypeVoid
                3:             TypeFunction 2
                6:             TypeInt 32 1

Test/baseResults/vulkan.vert.out

@@ -22,7 +22,8 @@ ERROR: 0:25: 'packed' : not allowed when using GLSL for Vulkan
 ERROR: 0:32: 'initializer' : can't use with types containing arrays sized with a specialization constant 
 ERROR: 0:34: '=' : can't use with types containing arrays sized with a specialization constant 
 ERROR: 0:35: '==' : can't use with types containing arrays sized with a specialization constant 
-ERROR: 22 compilation errors.  No code generated.
+ERROR: 0:39: 'set' : cannot be used with push_constant 
+ERROR: 23 compilation errors.  No code generated.
 
 
 

Test/vulkan.vert

@@ -35,3 +35,5 @@ void foo()
     if (a1 == a2) // ERROR, can't compare either
         ++color;
 }
+
+layout(set = 1, push_constant) uniform badpc { int a; } badpcI;  // ERROR, no descriptor set with push_constant

glslang/MachineIndependent/ParseHelper.cpp

@@ -4483,6 +4483,8 @@ void TParseContext::layoutQualifierCheck(const TSourceLoc& loc, const TQualifier
     if (qualifier.layoutPushConstant) {
         if (qualifier.storage != EvqUniform)
             error(loc, "can only be used with a uniform", "push_constant", "");
+        if (qualifier.hasSet())
+            error(loc, "cannot be used with push_constant", "set", "");
     }
 }