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From: "Alexandre.BUSTICO at enac dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114451] New: regression : ICE on switch over enum class
Date: Sun, 24 Mar 2024 22:47:16 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: Alexandre.BUSTICO at enac dot fr
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114451

            Bug ID: 114451
           Summary: regression : ICE on switch over enum class
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: Alexandre.BUSTICO at enac dot fr
  Target Milestone: ---

Same bug had been reported as BugID 103825 for gcc12.0.0 The bug has been f=
ixed
for subsequent gcc version : 12.2, 13.1 and 13.2 does not trigger the bug. =
The
bug is exhibited again with gcc14.0.0 devel.

code that trigger ICE :=20

enum class En {A};
struct St {En field :1;};

int main(void)
{
    volatile St s =3D {.field =3D En::A};
    switch(s.field) {
        case En::A : break;
    }
}


error message :
<source>: In function 'int main()':
<source>:4:5: error: type precision mismatch in switch statement
    4 | int main(void)
      |     ^~~~
switch (retval.0) <default: <D.6394>, case 0: <D.6388>>
<source>:4:5: internal compiler error: 'verify_gimple' failed
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1

gotbolt link : https://compiler-explorer.com/z/Eh39WKvxo=