From a10f99375e7912df863cf101a38e9703cfcd72f1 Mon Sep 17 00:00:00 2001 From: Sam Gross Date: Thu, 23 Jan 2025 04:26:25 -0500 Subject: Revert "GH-128914: Remove conditional stack effects from `bytecodes.c` and the code generators (GH-128918)" (GH-129202) The commit introduced a ~2.5-3% regression in the free threading build. This reverts commit ab61d3f4303d14a413bc9ae6557c730ffdf7579e. --- Python/optimizer.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'Python/optimizer.c') diff --git a/Python/optimizer.c b/Python/optimizer.c index b91caf11ffa..9beb47246eb 100644 --- a/Python/optimizer.c +++ b/Python/optimizer.c @@ -1274,7 +1274,10 @@ uop_optimize( for (int pc = 0; pc < length; pc++) { int opcode = buffer[pc].opcode; int oparg = buffer[pc].oparg; - if (oparg < _PyUop_Replication[opcode]) { + if (_PyUop_Flags[opcode] & HAS_OPARG_AND_1_FLAG) { + buffer[pc].opcode = opcode + 1 + (oparg & 1); + } + else if (oparg < _PyUop_Replication[opcode]) { buffer[pc].opcode = opcode + oparg + 1; } else if (is_terminator(&buffer[pc])) { -- cgit v1.2.3