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PR c/80892 - -Wfloat-conversion now warns about non-floats

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gcc/c-family/ChangeLog:

	PR c/80892
	* c-warn.c (conversion_warning): Use -Wconversion for integer
	conversion and -Wfloat-conversion for floating one.

gcc/testsuite/ChangeLog:

	PR c/80892
	* c-c++-common/Wfloat-conversion-2.c: New test.

From-SVN: r248852
This commit is contained in:
Martin Sebor 2017-06-03 02:49:30 +00:00 committed by Martin Sebor
parent eb64690cd5
commit 2474f48f73
3 changed files with 24 additions and 4 deletions
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6
gcc/c-family/ChangeLog
View File

@ -1,3 +1,9 @@
2017-06-02 Martin Sebor <msebor@redhat.com>
PR c/80892
* c-warn.c (conversion_warning): Use -Wconversion for integer
conversion and -Wfloat-conversion for floating one.
2017-06-02 Bernd Edlinger <bernd.edlinger@hotmail.de>
* c.opt (Wsizeof-pointer-div): New warning option.

17
gcc/c-family/c-warn.c
View File

@ -1043,10 +1043,19 @@ conversion_warning (location_t loc, tree type, tree expr, tree result)
"conversion from %qT to to %qT discards imaginary "
"component",
expr_type, type);
else if (conversion_kind == UNSAFE_REAL || conversion_kind)
warning_at (loc, OPT_Wfloat_conversion,
"conversion from %qT to %qT may change value",
expr_type, type);
else
{
int warnopt;
if (conversion_kind == UNSAFE_REAL)
warnopt = OPT_Wfloat_conversion;
else if (conversion_kind)
warnopt = OPT_Wconversion;
else
break;
warning_at (loc, warnopt,
"conversion from %qT to %qT may change value",
expr_type, type);
}
}
}

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2017-06-02 Martin Sebor <msebor@redhat.com>
PR c/80892
* c-c++-common/Wfloat-conversion-2.c: New test.
2017-06-02 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/68754