[php-src] Issue #24634: Tracing JIT reads a stale stack slot at a side exit

Issue: https://github.com/php/php-src/issues/24634 Author: dixyes ### Description opcache.jit=tracing miscompiles a function that reads a variable in one branch and assigns a constant to the same variable in another branch. The else branch uses $exponent = 113 instead of the input exponent, so every normal input gives a wrong result. 0x0400 must give 0x38800000, but gives 0x70800000. opcache.jit=function and opcache.jit=off give correct results. The effect is silent wrong numeric results. PHP 8.5.11 NTS, 8.7.0-dev ZTS, and master 4a51e519 give the same wrong bits. ### PHP Version ```plain PHP 8.5.11 NTS, 8.7.0-dev ZTS, and master 4a51e519 ``` ### Operating System _No response_