[Bug c++/61562] New: Compiler crash when combining -Wstrict-overflow=4 -O2

[Bug c++/61562] New: Compiler crash when combining -Wstrict-overflow=4 -O2

[zweije at xs4all dot nl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61562

            Bug ID: 61562
           Summary: Compiler crash when combining -Wstrict-overflow=4 -O2
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zweije at xs4all dot nl

Created attachment 32974
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32974&action=edit
Test output

gcc-4.9 crashes when combining -Wstrict-overflow=4 and -O2 on the following
code snippet:

void f() {
 unsigned char x = 0;
 (x * 185) % 256;
}

Also crashes when compiled as .cpp.

Test output attached.

[Bug middle-end/61562] Compiler crash when combining -Wstrict-overflow=4 -O2

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61562

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-06-19
                 CC|                            |iant at google dot com,
                   |                            |manu at gcc dot gnu.org
          Component|c                           |middle-end
     Ever confirmed|0                           |1

--- Comment #1 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Also in trunk.

              if (strict_overflow_p)
                fold_overflow_warning (("assuming signed overflow does not "
                                        "occur when simplifying "
                                        "X % (power of two)"),
                                       WARN_STRICT_OVERFLOW_MISC);

The % should probably be %%.

Everybody (even people that do not need approval) should add testcases when
adding new  warnings and errors.
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Subject: [Bug bootstrap/61565] New: ICE building libjava/interpret.cc
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61565

            Bug ID: 61565
           Summary: ICE building libjava/interpret.cc
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rth at gcc dot gnu.org

Created attachment 32976
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32976&action=edit
preprocessed file

$ cc1plus -quiet -O2 -fPIC -fnon-call-exceptions interpret.ii 

../../../git-rh/libjava/interpret.cc: In static member function ‘static void
_Jv_InterpMethod::run(void*, ffi_java_raw*, _Jv_InterpMethod*)’:
../../../git-rh/libjava/interpret.cc:991:1: error: missing REG_EH_REGION note
at the end of bb 961
 }
 ^
../../../git-rh/libjava/interpret.cc:991:1: error: missing REG_EH_REGION note
at the end of bb 944
../../../git-rh/libjava/interpret.cc:991:1: internal compiler error:
verify_flow_info failed
0x8282f3 verify_flow_info()
    ../../git-rh/gcc/cfghooks.c:260
0xac52bb execute_function_todo
    ../../git-rh/gcc/passes.c:1789
0xac5bcb execute_todo
    ../../git-rh/gcc/passes.c:1834
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida538

--- Comment #9 from Joshua Kinard <kumba at gentoo dot org> ---
Rebuilt/upgraded to gcc-4.8.3 against the patched glibc-2.19, and I am still
getting the hang.

[Bug middle-end/61562] Compiler crash when combining -Wstrict-overflow=4 -O2

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61562

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |6.0

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 6 by removal of the warning via r6-1114.