Don't allow invariant in a function.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24009 e7fa87d3-cd2b-0410-9028-fcbf551c1848

Test/baseResults/100.frag.out

@@ -24,10 +24,13 @@ ERROR: 0:47: 'invariant' : can only apply to an output or an input in a non-vert
  
 ERROR: 0:50: 'invariant' : can only apply to an output or an input in a non-vertex stage
  
+ERROR: 0:56: 'invariant' : not allowed in nested scope 
 ERROR: 0:56: 'invariant' : can only apply to an output or an input in a non-vertex stage
  
+ERROR: 0:57: 'invariant' : not allowed in nested scope 
 ERROR: 0:57: 'invariant' : can only apply to an output or an input in a non-vertex stage
  
+ERROR: 0:59: 'invariant' : not allowed in nested scope 
 ERROR: 0:59: 'invariant' : can only apply to an output or an input in a non-vertex stage
  
 ERROR: 0:63: 'invariant' : can only apply to an output or an input in a non-vertex stage
@@ -51,7 +54,7 @@ ERROR: 0:111: 'gl_FragDepth' : undeclared identifier
 ERROR: 0:134: 'texture3D' : no matching overloaded function found 
 ERROR: 0:135: 'texture2DProjLod' : no matching overloaded function found 
 ERROR: 0:140: '' :  syntax error
-ERROR: 46 compilation errors.  No code generated.
+ERROR: 49 compilation errors.  No code generated.
 
 ERROR: node is still EOpNull!
 0:3  Sequence

glslang/MachineIndependent/glslang.y

@@ -1059,6 +1059,7 @@ fully_specified_type
 
 invariant_qualifier
     : INVARIANT {
+        parseContext.globalCheck($1.loc, "invariant");
         parseContext.profileRequires($$.loc, ENoProfile, 120, 0, "invariant");
         $$.init($1.loc);
         $$.qualifier.invariant = true;