optimizer_generator does not respect multiple caches

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Bug report

Bug description:

Please apply this fix:

diff --git a/Tools/cases_generator/optimizer_generator.py b/Tools/cases_generator/optimizer_generator.py
index b6b59838a70..784e1a8a2d1 100644
--- a/Tools/cases_generator/optimizer_generator.py
+++ b/Tools/cases_generator/optimizer_generator.py
@@ -412,6 +412,7 @@ def write_uop(
                     args.append(input.name)
             out.emit(f'DEBUG_PRINTF({", ".join(args)});\n')
         if override:
+            idx = 0
             for cache in uop.caches:
                 if cache.name != "unused":
                     if cache.size == 4:
@@ -419,7 +420,8 @@ def write_uop(
                     else:
                         type = f"uint{cache.size*16}_t "
                         cast = f"uint{cache.size*16}_t"
-                    out.emit(f"{type}{cache.name} = ({cast})this_instr->operand0;\n")
+                    out.emit(f"{type}{cache.name} = ({cast})this_instr->operand{idx};\n")
+                    idx += 1
         if override:
             emitter = OptimizerEmitter(out, {}, uop, stack.copy())
             # No reference management of inputs needed.

And add a test to Lib/test/test_generated_cases.py.

Sorry to bother you again with this @NekoAsakura , would you be wiling to take this up?

CPython versions tested on:

CPython main branch, 3.15

Operating systems tested on:

No response

Linked PRs

• gh-148515: make optimizer_generator respect multiple caches #148524

[NekoAsakura]

Sure! I'm on it.