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* [Bug tree-optimization/80147] missing maybe-uninitialized warning on variable with no side effects
[not found] <bug-80147-4@http.gcc.gnu.org/bugzilla/>
@ 2021-04-01 23:28 ` msebor at gcc dot gnu.org
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From: msebor at gcc dot gnu.org @ 2021-04-01 23:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80147
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |WONTFIX
Status|NEW |RESOLVED
CC| |msebor at gcc dot gnu.org
--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Eric explained the reason for the missing warning with -O1 in the test case in
comment #0. The code in the test case in comment #3 is folded away very early
on so there's nothing for the warning to complain about.
My guess is that Clang warns during parsing. GCC much later on, to avoid
warning for dead code. It's a deliberate decision. I don't think there's
anything to fix here.
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[not found] <bug-80147-4@http.gcc.gnu.org/bugzilla/>
2021-04-01 23:28 ` [Bug tree-optimization/80147] missing maybe-uninitialized warning on variable with no side effects msebor at gcc dot gnu.org
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