#3515 --debug hinders peephole optimizer

[Philipp Klaus Krause]

When compiling with --debug, fewer peephole optimizer rule are applied, Apparently the debug information confuses the peephole optimizer.

Example:
Compiling the regression tests for stm8, rule 22e gets applied for the modulong.c test. When adding the --debug flag, it does not get applied.

[Philipp Klaus Krause]

Fixed in [r13772], for stm8, pdk13, pdk14, pdk15 (those ports did not correctly pass the information about which lines are debug info to the peephole optimizer).