https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104081
Bug ID: 104081
Summary: Variable optimized out despite -Og
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: matthias at urlichs dot de
Target Milestone: ---
I expect the optimizer, when confronted with "-Og", to keep my variables
debuggable.
(I also expect (of me) to not make terminally stupid mistakes like the one
exhibited here, but that's a different problem …)
// "data" is a std::string_view
(gdb) l
19 if(data.length() == 0)
20 throw_invalid("empty",data);
21 }
22 for (const auto& c : data) {
23 if ('0' < c || '9' > c)
24 throw_invalid("not a number",data);
25 val = val*10 + c-'0';
26 }
27 if(neg)
28 val = -val;
(gdb) p data
$1 = <optimized out>
(gdb) p c
$2 = <optimized out>
(gdb) q
Options: g++-12 -march=native -Og -g -xc++ -std=c++17 …
