https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89554
Bug ID: 89554
Summary: Incorrect location of warning
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: david.bolvansky at gmail dot com
Target Milestone: ---
Found when building LLVM trunk with GCC 9 trunk (built today) compiler.
https://clang.llvm.org/doxygen/LiteralSupport_8cpp_source.html
const char *End = saw_exponent ? ExponentBegin : SuffixBegin;
for (const char *Ptr = DigitsBegin; Ptr < End; ++Ptr) {
if (*Ptr == '.') {
FoundDecimal = true;
continue;
/home/xbolva00/LLVM/llvm-project/clang/lib/Lex/LiteralSupport.cpp:1127:43:
warning: ‘ExponentBegin’ may be used uninitialized in this function
[-Wmaybe-uninitialized]
1127 | for (const char *Ptr = DigitsBegin; Ptr < End; ++Ptr) {
~~~~^~~~~
I would expect carret to be here: saw_exponent ? ExponentBegin : SuffixBegin;
~~~~^~~~~
As side note: there are so many "-Wmaybe-uninitialized" warnings. You should
check them whether real issues or no (they spam build warning log very much) -
don't think so.
You should consider removing '-Wmaybe-uninitialized" from standard "-Wall
-Wextra".
