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From: "jakub at redhat dot com" <>
Subject: [Bug default/27480] New: Consider .debug_loclists optimizations
Date: Sat, 27 Feb 2021 10:45:45 +0000	[thread overview]
Message-ID: <> (raw)

            Bug ID: 27480
           Summary: Consider .debug_loclists optimizations
           Product: dwz
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: default
          Assignee: nobody at sourceware dot org
          Reporter: jakub at redhat dot com
                CC: dwz at sourceware dot org
  Target Milestone: ---

As mentioned in
GCC for non-partitioned TUs emits DW_LLE_offset_pair which will be likely a win
for small TUs, but might be too large for very large TUs - both operands are
offsets from base, so say 256KB TU would near the end of the .text section have
3 bytes for each of the operands, and for 2MB TU even 4 bytes for each operand.
Compared to one DW_LLE_base_address with 4 (or 8) byte operand and then
DW_LLE_offset_pair with likely just 1 byte operands.
Similarly, for partitioned TUs, we emit DW_LLE_start_end or DW_LLE_base_address
+ DW_LLE_offset_pair, but maybe DW_LLE_offset_pair would be smaller.

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             reply	other threads:[~2021-02-27 10:45 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-27 10:45 jakub at redhat dot com [this message]
2021-03-02  7:51 ` [Bug default/27480] " vries at gcc dot

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