* [Bug default/27480] New: Consider .debug_loclists optimizations
@ 2021-02-27 10:45 jakub at redhat dot com
2021-03-02 7:51 ` [Bug default/27480] " vries at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: jakub at redhat dot com @ 2021-02-27 10:45 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27480
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
https://gcc.gnu.org/pipermail/gcc-patches/2021-February/565965.html
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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* [Bug default/27480] Consider .debug_loclists optimizations
2021-02-27 10:45 [Bug default/27480] New: Consider .debug_loclists optimizations jakub at redhat dot com
@ 2021-03-02 7:51 ` vries at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: vries at gcc dot gnu.org @ 2021-03-02 7:51 UTC (permalink / raw)
To: dwz
https://sourceware.org/bugzilla/show_bug.cgi?id=27480
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
CC| |vries at gcc dot gnu.org
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2021-02-27 10:45 [Bug default/27480] New: Consider .debug_loclists optimizations jakub at redhat dot com
2021-03-02 7:51 ` [Bug default/27480] " vries at gcc dot gnu.org
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