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* [Bug bootstrap/102831] New: [12 regression] Spurious -Wparentheses etc. warnings
@ 2021-10-19  9:38 ro at gcc dot gnu.org
  2021-10-19  9:38 ` [Bug bootstrap/102831] " ro at gcc dot gnu.org
                   ` (11 more replies)
  0 siblings, 12 replies; 13+ messages in thread
From: ro at gcc dot gnu.org @ 2021-10-19  9:38 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102831

            Bug ID: 102831
           Summary: [12 regression] Spurious -Wparentheses etc. warnings
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ro at gcc dot gnu.org
  Target Milestone: ---
            Target: *-*-solaris2.11

Recently, Solaris bootstrap has repeatedly been broken in very confusing ways:

* 

/vol/gcc/src/hg/master/local/gcc/lra-constraints.c: In function 'bool
curr_insn_transform(bool)':
/vol/gcc/src/hg/master/local/gcc/lra-constraints.c:4367:21: error: suggest
parentheses around assignment used as truth value [-Werror=parentheses]
 4367 |                  (c = *constraint) && c != ',' && c != '#';
      |                  ~~~^~~~~~~~~~~~~~

  Solaris 11.4/SPARC, once 20211006, again 20211018

* 

/vol/gcc/src/hg/master/local/libgomp/oacc-init.c:876:1: error: optimization
attribute on ‘acc_on_device’ follows definition but the attribute doesn’t match
[-Werror=attributes]
  876 | {
      | ^
/vol/gcc/src/hg/master/local/libgomp/oacc-init.c:875:1: note: previous
definition of ‘acc_on_device’ with type ‘int(acc_device_t)’
  875 | acc_on_device (acc_device_t dev)
      | ^~~~~~~~~~~~~
/vol/gcc/src/hg/master/local/libgomp/oacc-init.c:954:1: internal compiler
error: in dwarf2out_register_main_translation_unit, at dwarf2out.c:28329
  954 | }
      | ^
0x109240f dwarf2out_register_main_translation_unit
        /vol/gcc/src/hg/master/local/gcc/dwarf2out.c:28328
0xc184b3 pop_scope()
        /vol/gcc/src/hg/master/local/gcc/c/c-decl.c:1217
0xc19963 pop_file_scope()
        /vol/gcc/src/hg/master/local/gcc/c/c-decl.c:1465
0xdf4be7 c_common_parse_file()
        /vol/gcc/src/hg/master/local/gcc/c-family/c-opts.c:1238

  Solaris 11.4/SPARC, 32 and 64-bit, 20211003

* 

In file included from /vol/gcc/src/hg/master/local/gcc/sparseset.c:23:
/vol/gcc/src/hg/master/local/gcc/sparseset.c: In function 'void
sparseset_ior(sparseset, sparseset, sparseset)':
/vol/gcc/src/hg/master/local/gcc/sparseset.h:215:20: error: suggest parentheses
around assignment used as truth value [-Werror=parentheses]
  215 |        && (((ITER) = sparseset_iter_elm (SPARSESET)) || 1);            
\
      |            ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/vol/gcc/src/hg/master/local/gcc/sparseset.c:214:7: note: in expansion of macro
'EXECUTE_IF_SET_IN_SPARSESET'
  214 |       EXECUTE_IF_SET_IN_SPARSESET (b, e)
      |       ^~~~~~~~~~~~~~~~~~~~~~~~~~~

  Solaris 11.3, first SPARC, 20210924, then x86, 20211001, 20211015, probably
  more

  reghunts on sparc and x86 converged, but the results made no sense:

  sparc as of 20210924 identified

commit 4e7a92c0ff3871d955ca8fb133f869b216d7224d
Author: Richard Earnshaw <rearnsha@arm.com>
Date:   Tue Sep 21 11:14:46 2021 +0100

    arm: pass architecture extensions to assembler if supported

  x86 as of 20211001 identified

commit a11052d98db2f2a61841f0c5ee84de4ca1b3e296
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue Sep 28 12:35:29 2021 +0100

    libstdc++: Improve std::forward static assert message

This seems like some sort of memory corruption to me, but I'm a bit at a loss
on how to proceed.

When continuing the builds with adding -Wno-error=parentheses to the affected
files, the test results showed nothing unexpected.

^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2022-03-10 10:26 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-10-19  9:38 [Bug bootstrap/102831] New: [12 regression] Spurious -Wparentheses etc. warnings ro at gcc dot gnu.org
2021-10-19  9:38 ` [Bug bootstrap/102831] " ro at gcc dot gnu.org
2021-11-08  8:13 ` ebotcazou at gcc dot gnu.org
2021-11-08 10:00 ` tschwinge at gcc dot gnu.org
2021-11-08 10:12 ` ro at CeBiTec dot Uni-Bielefeld.DE
2021-11-08 15:42 ` msebor at gcc dot gnu.org
2021-11-08 22:58 ` bergner at gcc dot gnu.org
2021-11-08 23:11 ` bergner at gcc dot gnu.org
2021-11-09  2:32 ` msebor at gcc dot gnu.org
2021-11-09 17:19 ` bergner at gcc dot gnu.org
2022-01-17 18:22 ` tschwinge at gcc dot gnu.org
2022-03-10 10:19 ` rguenth at gcc dot gnu.org
2022-03-10 10:26 ` ro at CeBiTec dot Uni-Bielefeld.DE

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