`try ... catch` in an inline function produces `.gcc_except_table.*` in a COMDAT group with GCC or newer Clang (since D83655). For --gc-sections, currently we scan `.eh_frame` pieces and mark liveness of such a `.gcc_except_table.*` and then the associated `.text.*` (if a member in a section group is retained, the others should be retained as well). Essentially all `.text.*` and `.gcc_except_table.*` compiled from inline functions with `try ... catch` cannot be discarded by the imprecise --gc-sections. Compared with the state before D83655, the output `.gcc_except_table` is smaller (non-prevailing copies in COMDAT groups can now be discarded) but `.text` may be larger, i.e. size regression. This patch teaches the .eh_frame piece scanning code to only mark `.gcc_except_table` in a section group, thus allow unused `.text.*` and `.gcc_except_table.*` to be discarded.

`try ... catch` in an inline function produces `.gcc_except_table.*` in a COMDAT group with GCC or newer Clang (since D83655). For --gc-sections, currently we scan `.eh_frame` pieces and mark liveness of such a `.gcc_except_table.*` and then the associated `.text.*` (if a member in a section group is retained, the others should be retained as well). Essentially all `.text.*` and `.gcc_except_table.*` compiled from inline functions with `try ... catch` cannot be discarded by the imprecise --gc-sections. Compared with the state before D83655, the output `.gcc_except_table` is smaller (non-prevailing copies in COMDAT groups can now be discarded) but `.text` may be larger, i.e. size regression. This patch teaches the .eh_frame piece scanning code to not mark `.gcc_except_table` in a section group, thus allow unused `.text.*` and `.gcc_except_table.*` in a section group to be discarded. Note, non-group `.gcc_except_table` can still not be discarded. That is the status quo.

`try ... catch` in an inline function produces `.gcc_except_table.*` in a COMDAT group with GCC or newer Clang (since D83655). For --gc-sections, currently we scan `.eh_frame` pieces and mark liveness of such a `.gcc_except_table.*` and then the associated `.text.*` (if a member in a section group is retained, the others should be retained as well). Essentially all `.text.*` and `.gcc_except_table.*` compiled from inline functions with `try ... catch` cannot be discarded by the imprecise --gc-sections. Compared with the state before D83655, the output `.gcc_except_table` is smaller (non-prevailing copies in COMDAT groups can now be discarded) but `.text` may be larger, i.e. size regression. This patch teaches the .eh_frame piece scanning code to onlynot mark `.gcc_except_table` in a section group, thus allow unused `.text.*` and `.gcc_except_table.*` to*` in a section group to be discarded. Note, non-group `.gcc_except_table` can still not be discarded. That is the status quo.