tint: Add constructors and conversions to the intrinsic table

For all types except for arrays and structures, which are explicitly
typed and have trivial overloads.

This will simplify maintenance of type functions, unifies diagnostic
messages and will greatly simplify the [AbstractInt -> i32|u32]
[AbstractFloat -> f32|f16] logic.

Bug: tint:1504
Change-Id: I2b17ed530d1cece22adcbfc6de0bec4fbda4c7bd
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/90248
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>

src/tint/sem/parameter_usage.cc

@@ -56,6 +56,24 @@ const char* str(ParameterUsage usage) {
             return "texture";
         case ParameterUsage::kValue:
             return "value";
+        case ParameterUsage::kW:
+            return "w";
+        case ParameterUsage::kX:
+            return "x";
+        case ParameterUsage::kXy:
+            return "xy";
+        case ParameterUsage::kXyz:
+            return "xyz";
+        case ParameterUsage::kY:
+            return "y";
+        case ParameterUsage::kYz:
+            return "yz";
+        case ParameterUsage::kZ:
+            return "z";
+        case ParameterUsage::kZw:
+            return "zw";
+        case ParameterUsage::kZyw:
+            return "zyw";
     }
     return "<unknown>";
 }

src/tint/sem/parameter_usage.h

@@ -44,6 +44,15 @@ enum class ParameterUsage {
     kSampler,
     kTexture,
     kValue,
+    kW,
+    kX,
+    kXy,
+    kXyz,
+    kY,
+    kYz,
+    kZ,
+    kZw,
+    kZyw,
 };
 
 /// @returns a string representation of the given parameter usage.