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* [Bug c/61405] New: Not emitting "enumeration value not handled in switch" warning for bit-field enums
@ 2014-06-03 16:09 jamborm at gcc dot gnu.org
  2014-06-03 16:12 ` [Bug c/61405] " jamborm at gcc dot gnu.org
                   ` (4 more replies)
  0 siblings, 5 replies; 6+ messages in thread
From: jamborm at gcc dot gnu.org @ 2014-06-03 16:09 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61405

            Bug ID: 61405
           Summary: Not emitting "enumeration value not handled in switch"
                    warning for bit-field enums
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jamborm at gcc dot gnu.org

This a followup to PR 61340.  In both C and C++ we do not emit a
warning about unhandled enumeration values in a switch if the enum is
also a bit-field (and clang does, that is how it was noticed).

Testcase:

$ cat test.c
enum ipa_ref_use
{
  IPA_REF_LOAD,
  IPA_REF_STORE,
  IPA_REF_ADDR,
  IPA_REF_ALIAS
};

/* Record of reference in callgraph or varpool.  */
struct ipa_ref
{
  unsigned int lto_stmt_uid;
  unsigned int referred_index;
#ifndef PRODUCE_WARNING
  enum ipa_ref_use use:2;
#else
  enum ipa_ref_use use;
#endif
  unsigned int speculative:1;
};

int blah1 (unsigned int);
int blah2 (unsigned int);
int blah3 (unsigned int);

int
foo (struct ipa_ref *ref)
{
  int r;
  switch (ref->use)
    {
    case IPA_REF_LOAD:
      r = blah1 (ref->lto_stmt_uid) + 8;
      break;
    case IPA_REF_STORE:
      r = blah2 (ref->referred_index +5) * 3;
      break;
    case IPA_REF_ADDR:
      r = blah3 (ref->lto_stmt_uid + ref->speculative);
      break;
    }
  return r;
}

$ ~/gcc/mine/inst/bin/gcc test.c -O -S -Wswitch
$ ~/gcc/mine/inst/bin/gcc test.c -O -S -Wswitch -DPRODUCE_WARNING
test.c: In function ‘foo’:
test.c:30:3: warning: enumeration value ‘IPA_REF_ALIAS’ not handled in switch
[-Wswitch]
   switch (ref->use)
   ^
$ clang test.c -O -S -Wswitch -DPRODUCE_WARNING    
test.c:30:11: warning: enumeration value 'IPA_REF_ALIAS' not handled in switch
[-Wswitch]
  switch (ref->use)
          ^
1 warning generated.
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From: "christophe.lyon at st dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/61154] [4.10 Regression][ARM] wide-int merge introduced regressions in vshuf tests
Date: Tue, 03 Jun 2014 16:10:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida154

--- Comment #9 from christophe.lyon at st dot com ---
I confirm it fixes the regressions I reported.
Thanks.


^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-09-24 17:25 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-06-03 16:09 [Bug c/61405] New: Not emitting "enumeration value not handled in switch" warning for bit-field enums jamborm at gcc dot gnu.org
2014-06-03 16:12 ` [Bug c/61405] " jamborm at gcc dot gnu.org
2014-06-03 16:25 ` manu at gcc dot gnu.org
2014-09-18  9:02 ` mpolacek at gcc dot gnu.org
2014-09-18  9:11 ` mpolacek at gcc dot gnu.org
2014-09-24 17:25 ` mpolacek at gcc dot gnu.org

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