[PATCH] D41762: [DWARF] Incorrect prologue end line record.

[Carlos Alberto Enciso via Phabricator via llvm-commits]

CarlosAlbertoEnciso marked an inline comment as done.
CarlosAlbertoEnciso added a comment.

As the patch is intended to fix the invalid prologue-end records, the added check is looking for instructions associated with the frame setup: MachineInstr::FrameSetup flag.

When generating Debug Location (line records) at the start of an instruction, that check stops emitting a line record for instructions with no correspondence to user code, otherwise a normal line record will be emitted.

In the case of 'shrink-wrapped code', the check is valid, as instructions before the frame setup will have correspondence to user code, hence accurate line records will be emitted.

Essentially line records for instructions that are not part of the epilogue/prologue are not affected by this change.


Repository:
  rL LLVM

https://reviews.llvm.org/D41762