Hello, I'm sorry to bother you. And I have some gcc compiler optimization questions to ask you. First of all, I used csmith tools to generate c files randomly. Meanwhile, the final running result was the checksum for global variables in a c file. For the two c files in the attachment, I performed the equivalent transformation of loop from *initial.**c* to *transformed.c*. And the two files produced different results (i.e. different checksum values) when using *-Os* optimization level, while the results of both were the same when using other levels of optimization such as *-O0*, -O1, -O2, -O3, *-Ofast*. Please help me to explain why this is, thank you.
command line: *gcc file.c -Os -lm -I $CSMITH_HOME/include && ./a.out* version: gcc 12.2.0 os: ubuntu 22.04
initial.c
Description: Binary data
transformed.c
Description: Binary data
