Update optimizer.c

Fidget-Spinner · Fidget-Spinner · commit 547f5872e020 · 2025-11-07T22:59:14.000Z
diff --git a/Python/optimizer.c b/Python/optimizer.c
@@ -711,7 +711,10 @@ _PyJit_translate_single_bytecode_to_trace(
         max_length--;
     }
 
-    RESERVE_RAW(expansion->nuops + needs_guard_ip + 3 + (!OPCODE_HAS_NO_SAVE_IP(opcode)), "uop and various checks");
+    // _GUARD_IP leads to an exit.
+    max_length -= needs_guard_ip;
+
+    RESERVE_RAW(expansion->nuops + needs_guard_ip + 2 + (!OPCODE_HAS_NO_SAVE_IP(opcode)), "uop and various checks");
 
     ADD_TO_TRACE(_CHECK_VALIDITY, 0, 0, target);
 

Original file line number	Diff line number	Diff line change
`@@ -711,7 +711,10 @@ _PyJit_translate_single_bytecode_to_trace(`
`711`	`711`	`max_length--;`
`712`	`712`	`}`
`713`	`713`
`714`		`- RESERVE_RAW(expansion->nuops + needs_guard_ip + 3 + (!OPCODE_HAS_NO_SAVE_IP(opcode)), "uop and various checks");`
	`714`	`+ // _GUARD_IP leads to an exit.`
	`715`	`+ max_length -= needs_guard_ip;`
	`716`	`+`
	`717`	`+ RESERVE_RAW(expansion->nuops + needs_guard_ip + 2 + (!OPCODE_HAS_NO_SAVE_IP(opcode)), "uop and various checks");`
`715`	`718`
`716`	`719`	`ADD_TO_TRACE(_CHECK_VALIDITY, 0, 0, target);`
`717`	`720`