spirv: Update SPIR-V grammar to use aliases

For enumerants and instruction names, instead of duplicating the values
now the grammar will use an aliases field to list the alternative names.
Update the Python scripts for that.

The new SPIR-V files correspond to d92cf88c371424591115a87499009dfad41b669c
("Add "aliases" fields to the grammar and remove duplicated (#447)")
in https://github.com/KhronosGroup/SPIRV-Headers.

Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31369>

src/compiler/spirv/spirv_info_gen.py

@@ -36,12 +36,12 @@ def collect_data(spirv, kind):
 
     values = {}
     for x in operands["enumerants"]:
-        name = x["enumerant"]
         val = x["value"]
-        if val not in values:
-            values[val] = [name]
-        else:
-            values[val].append(name)
+        assert(val not in values)
+        names = [x["enumerant"]]
+        if "aliases" in x:
+            names.extend(x["aliases"])
+        values[val] = names
 
     return (kind, list(values.values()), operands["category"])
 
@@ -49,15 +49,13 @@ def collect_opcodes(spirv):
     seen = set()
     values = []
     for x in spirv["instructions"]:
-        # Handle aliases by choosing the first one in the grammar.
-        # E.g. OpDecorateString and OpDecorateStringGOOGLE share same opcode.
-        if x["opcode"] in seen:
-            continue
         opcode = x["opcode"]
+        assert(opcode not in seen)
+        seen.add(opcode)
+
         name = x["opname"]
         assert name.startswith("Op")
         values.append([name[2:]])
-        seen.add(opcode)
 
     return ("Op", values, None)