HLSL: Handle swizzles on vectors of size 1. Addresses issue #453.

Test/baseResults/hlsl.shapeConv.frag.out

@@ -101,8 +101,13 @@ gl_FragCoord origin is upper left
 0:27        Construct float (temp 1-component vector of float)
 0:27          'v' (temp 4-component vector of float)
 0:27        'f1' (temp 1-component vector of float)
-0:29      Branch: Return with expression
-0:29        'input' (in 4-component vector of float)
+0:28      Construct float (temp float)
+0:28        'f1' (temp 1-component vector of float)
+0:29      Construct vec3 (temp 3-component vector of float)
+0:29        Construct float (temp float)
+0:29          'f1' (temp 1-component vector of float)
+0:31      Branch: Return with expression
+0:31        'input' (in 4-component vector of float)
 0:?   Linker Objects
 
 
@@ -211,13 +216,18 @@ gl_FragCoord origin is upper left
 0:27        Construct float (temp 1-component vector of float)
 0:27          'v' (temp 4-component vector of float)
 0:27        'f1' (temp 1-component vector of float)
-0:29      Branch: Return with expression
-0:29        'input' (in 4-component vector of float)
+0:28      Construct float (temp float)
+0:28        'f1' (temp 1-component vector of float)
+0:29      Construct vec3 (temp 3-component vector of float)
+0:29        Construct float (temp float)
+0:29          'f1' (temp 1-component vector of float)
+0:31      Branch: Return with expression
+0:31        'input' (in 4-component vector of float)
 0:?   Linker Objects
 
 // Module Version 10000
 // Generated by (magic number): 80001
-// Id's are bound by 81
+// Id's are bound by 84
 
                               Capability Shader
                1:             ExtInstImport  "GLSL.std.450"
@@ -321,6 +331,9 @@ gl_FragCoord origin is upper left
               75:    6(float) CompositeExtract 74 0
               76:    6(float) Load 69(f1)
               77:    41(bool) FOrdLessThan 75 76
-              78:    7(fvec4) Load 11(input)
-                              ReturnValue 78
+              78:    6(float) Load 69(f1)
+              79:    6(float) Load 69(f1)
+              80:   22(fvec3) CompositeConstruct 79 79 79
+              81:    7(fvec4) Load 11(input)
+                              ReturnValue 81
                               FunctionEnd

Test/hlsl.shapeConv.frag

@@ -25,6 +25,8 @@ float4 PixelShaderFunction(float4 input, float f) : COLOR0
 
     f1 == v;
     v < f1;
+    f1.x;
+    f1.xxx;
 
     return input;
 }

glslang/Include/revision.h

@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "Overload400-PrecQual.1464"
+#define GLSLANG_REVISION "Overload400-PrecQual.1465"
 #define GLSLANG_DATE "02-Sep-2016"

glslang/MachineIndependent/Intermediate.cpp

@@ -274,7 +274,8 @@ TIntermTyped* TIntermediate::addUnaryMath(TOperator op, TIntermTyped* child, TSo
     if (newType != EbtVoid) {
         child = addConversion(op, TType(newType, EvqTemporary, child->getVectorSize(),
                                                                child->getMatrixCols(),
-                                                               child->getMatrixRows()),
+                                                               child->getMatrixRows(),
+                                                               child->isVector()),
                               child);
         if (child == 0)
             return 0;

hlsl/hlslParseHelper.cpp

@@ -641,6 +641,15 @@ TIntermTyped* HlslParseContext::handleDotDereference(const TSourceLoc& loc, TInt
                 return addConstructor(loc, base, type);
             }
         }
+        if (base->getVectorSize() == 1) {
+            TType scalarType(base->getBasicType(), EvqTemporary, 1);
+            if (fields.num == 1)
+                return addConstructor(loc, base, scalarType);
+            else {
+                TType vectorType(base->getBasicType(), EvqTemporary, fields.num);
+                return addConstructor(loc, addConstructor(loc, base, scalarType), vectorType);
+            }
+        }
 
         if (base->getType().getQualifier().isFrontEndConstant())
             result = intermediate.foldSwizzle(base, fields, loc);