Kavon Farvardin 19e593bc07 PGO: new -debug-info-for-profiling frontend flag ...

This achieves the same as clang's `-fdebug-info-for-profiling`, which
emits DWARF discriminators to aid in narrowing-down which basic block
corresponds to a particular instruction address. This is particularly
useful for sampling-based profiling.

rdar://135443278

2024-11-01 11:59:54 -07:00

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