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c-typeck.c (convert_arguments): -Wtraditional now activates -Wconversion warnings...

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* c-typeck.c (convert_arguments): -Wtraditional now activates
	-Wconversion warnings, except for changes in signed-ness.
	Detect complex<->int & int<->complex conversions as well.

	* invoke.texi (-Wtraditional): Document it.

testsuite:
	* gcc.dg/wtr-conversion-1.c: New testcase.

From-SVN: r41232
This commit is contained in:
Kaveh R. Ghazi 2001-04-10 22:40:48 +00:00 committed by Kaveh Ghazi
parent 5a01d63496
commit 03829ad289
5 changed files with 121 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2001-04-10 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* c-typeck.c (convert_arguments): -Wtraditional now activates
-Wconversion warnings, except for changes in signed-ness.
Detect complex<->int & int<->complex conversions as well.
* invoke.texi (-Wtraditional): Document it.
Tue Apr 10 17:45:50 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* gcse.c (update_ld_motion_stores): Don't use variable I for an insn.

21
gcc/c-typeck.c
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@ -1676,19 +1676,25 @@ convert_arguments (typelist, values, name, fundecl)
{
/* Optionally warn about conversions that
differ from the default conversions. */
if (warn_conversion)
if (warn_conversion || warn_traditional)
{
int formal_prec = TYPE_PRECISION (type);
if (INTEGRAL_TYPE_P (type)
&& TREE_CODE (TREE_TYPE (val)) == REAL_TYPE)
warn_for_assignment ("%s as integer rather than floating due to prototype", (char *) 0, name, parmnum + 1);
if (INTEGRAL_TYPE_P (type)
&& TREE_CODE (TREE_TYPE (val)) == COMPLEX_TYPE)
warn_for_assignment ("%s as integer rather than complex due to prototype", (char *) 0, name, parmnum + 1);
else if (TREE_CODE (type) == COMPLEX_TYPE
&& TREE_CODE (TREE_TYPE (val)) == REAL_TYPE)
warn_for_assignment ("%s as complex rather than floating due to prototype", (char *) 0, name, parmnum + 1);
else if (TREE_CODE (type) == REAL_TYPE
&& INTEGRAL_TYPE_P (TREE_TYPE (val)))
warn_for_assignment ("%s as floating rather than integer due to prototype", (char *) 0, name, parmnum + 1);
else if (TREE_CODE (type) == COMPLEX_TYPE
&& INTEGRAL_TYPE_P (TREE_TYPE (val)))
warn_for_assignment ("%s as complex rather than integer due to prototype", (char *) 0, name, parmnum + 1);
else if (TREE_CODE (type) == REAL_TYPE
&& TREE_CODE (TREE_TYPE (val)) == COMPLEX_TYPE)
warn_for_assignment ("%s as floating rather than complex due to prototype", (char *) 0, name, parmnum + 1);
@ -1749,10 +1755,15 @@ convert_arguments (typelist, values, name, fundecl)
else if (TYPE_PRECISION (TREE_TYPE (val)) < TYPE_PRECISION (type)
&& TREE_UNSIGNED (TREE_TYPE (val)))
;
else if (TREE_UNSIGNED (type))
warn_for_assignment ("%s as unsigned due to prototype", (char *) 0, name, parmnum + 1);
else
warn_for_assignment ("%s as signed due to prototype", (char *) 0, name, parmnum + 1);
/* These warnings are only activated with
-Wconversion, not with -Wtraditional. */
else if (warn_conversion)
{
if (TREE_UNSIGNED (type))
warn_for_assignment ("%s as unsigned due to prototype", (char *) 0, name, parmnum + 1);
else
warn_for_assignment ("%s as signed due to prototype", (char *) 0, name, parmnum + 1);
}
}
}

5
gcc/invoke.texi
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@ -2122,6 +2122,11 @@ omitted. This is done under the assumption that the zero initializer in
user code appears conditioned on e.g. @code{__STDC__} to avoid missing
initializer warnings and relies on default initialization to zero in the
traditional C case.
@item
Conversions by prototypes. This is similar to @samp{-Wconversion} in
that it warns about width changes and fixed/floating point conversions,
however it does not warn about changes in signedness.
@end itemize
@item -Wundef

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2001-04-10 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* gcc.dg/wtr-conversion-1.c: New testcase.
2001-04-10 Richard Henderson <rth@redhat.com>
* g++.old-deja/g++.other/array5.C: New.

88
gcc/testsuite/gcc.dg/wtr-conversion-1.c Normal file
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@ -0,0 +1,88 @@
/* Test for -Wtraditional warnings on conversions by prototypes.
Note, gcc should omit these warnings in system header files.
By Kaveh R. Ghazi <ghazi@caip.rutgers.edu> 4/09/2001. */
/* { dg-do compile } */
/* { dg-options "-Wtraditional" } */
extern void foo_c (char);
extern void foo_ll (long long);
extern void foo_f (float);
extern void foo_ld (long double);
extern void foo_cd (__complex__ double);
extern char c;
extern long long ll;
extern float f;
extern long double ld;
extern __complex__ double cd;
void
testfunc1 (void)
{
foo_c (c); /* { dg-warning "with different width" "prototype conversion warning" } */
foo_c (ll); /* { dg-warning "with different width" "prototype conversion warning" } */
foo_c (f); /* { dg-warning "as integer rather than floating" "prototype conversion warning" } */
foo_c (ld); /* { dg-warning "as integer rather than floating" "prototype conversion warning" } */
foo_c (cd); /* { dg-warning "as integer rather than complex" "prototype conversion warning" } */
foo_ll (c); /* { dg-warning "with different width" "prototype conversion warning" } */
foo_ll (ll);
foo_ll (f); /* { dg-warning "as integer rather than floating" "prototype conversion warning" } */
foo_ll (ld); /* { dg-warning "as integer rather than floating" "prototype conversion warning" } */
foo_ll (cd); /* { dg-warning "as integer rather than complex" "prototype conversion warning" } */
foo_f (c); /* { dg-warning "as floating rather than integer" "prototype conversion warning" } */
foo_f (ll); /* { dg-warning "as floating rather than integer" "prototype conversion warning" } */
foo_f (f); /* { dg-warning "as `float' rather than `double'" "prototype conversion warning" } */
foo_f (ld); /* { dg-warning "as `float' rather than `double'" "prototype conversion warning" } */
foo_f (cd); /* { dg-warning "as floating rather than complex" "prototype conversion warning" } */
foo_ld (c); /* { dg-warning "as floating rather than integer" "prototype conversion warning" } */
foo_ld (ll); /* { dg-warning "as floating rather than integer" "prototype conversion warning" } */
foo_ld (f);
foo_ld (ld);
foo_ld (cd); /* { dg-warning "as floating rather than complex" "prototype conversion warning" } */
foo_cd (c); /* { dg-warning "as complex rather than integer" "prototype conversion warning" } */
foo_cd (ll); /* { dg-warning "as complex rather than integer" "prototype conversion warning" } */
foo_cd (f); /* { dg-warning "as complex rather than floating" "prototype conversion warning" } */
foo_cd (ld); /* { dg-warning "as complex rather than floating" "prototype conversion warning" } */
foo_cd (cd);
}
# 54 "sys-header.h" 3
/* We are in system headers now, no -Wtraditional warnings should issue. */
void
testfunc2 (void)
{
foo_c (c);
foo_c (ll);
foo_c (f);
foo_c (ld);
foo_c (cd);
foo_ll (c);
foo_ll (ll);
foo_ll (f);
foo_ll (ld);
foo_ll (cd);
foo_f (c);
foo_f (ll);
foo_f (f);
foo_f (ld);
foo_f (cd);
foo_ld (c);
foo_ld (ll);
foo_ld (f);
foo_ld (ld);
foo_ld (cd);
foo_cd (c);
foo_cd (ll);
foo_cd (f);
foo_cd (ld);
foo_cd (cd);
}