https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101574
Bug ID: 101574
Summary: gcc/sparseset.h:215:20: error: suggest parentheses
around assignment used as truth value
[-Werror=parentheses]
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: tschwinge at gcc dot gnu.org
Target Milestone: ---
This is strange. In one build of GCC of native x86_64-pc-linux-gnu (standard
bootstrap, no offloading), I'm suddenly (meaning: "it worked yesterday")
running into a bootstrap failure:
[...]
In file included from [...]/source-gcc/gcc/lra-lives.c:43:
[...]/source-gcc/gcc/lra-lives.c: In function ‘void
make_hard_regno_dead(int)’:
[...]/source-gcc/gcc/sparseset.h:215:20: error: suggest parentheses around
assignment used as truth value [-Werror=parentheses]
215 | && (((ITER) = sparseset_iter_elm (SPARSESET)) || 1);
\
| ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[...]/source-gcc/gcc/lra-lives.c:304:3: note: in expansion of macro
‘EXECUTE_IF_SET_IN_SPARSESET’
304 | EXECUTE_IF_SET_IN_SPARSESET (pseudos_live, i)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
[...]
cc1plus: all warnings being treated as errors
make[3]: *** [lra-lives.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm fsf-funding.pod lto-dump.pod gpl.pod cpp.pod gfdl.pod gcc.pod gcov.pod
gdc.pod gcov-dump.pod gfortran.pod gcov-tool.pod gccgo.pod
make[3]: Leaving directory `[...]/build-gcc/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `[...]/build-gcc'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `[...]/build-gcc'
make: *** [all] Error 2
Reproduced twice.
This is using GCC commit a61f6afbee370785cf091fe46e2e022748528307 sources,
clean. 'gcc/lra-lives.c', 'gcc/sparseset.h' have last been modified months
ago.
I'm not seeing this in a corresponding offloading-enabled build. (That doesn't
make sense -- the GCC bootstrap is the same?)
