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added -Wused-uninitialized and warning about variables which may be used without being initialized

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Wolfgang (Blub) Bumiller 2012-08-19 21:26:14 +02:00
parent ede98f5521
commit 9420c01538
3 changed files with 33 additions and 0 deletions
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31
ir.c
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@ -133,6 +133,24 @@ static void irerror(lex_ctx ctx, const char *msg, ...)
va_end(ap);
}
static bool irwarning(lex_ctx ctx, int warntype, const char *fmt, ...)
{
va_list ap;
int lvl = LVL_WARNING;
if (!OPTS_WARN(warntype))
return false;
if (opts_werror)
lvl = LVL_ERROR;
va_start(ap, fmt);
vprintmsg(lvl, ctx.file, ctx.line, "warning", fmt, ap);
va_end(ap);
return opts_werror;
}
/***********************************************************************
*IR Builder
*/
@ -1802,6 +1820,19 @@ bool ir_function_calculate_liferanges(ir_function *self)
}
}
} while (changed);
if (self->blocks_count) {
ir_block *block = self->blocks[0];
for (i = 0; i < block->living_count; ++i) {
ir_value *v = block->living[i];
if (v->name[0] == '#' || v->name[0] == '%')
continue;
if (irwarning(v->context, WARN_USED_UNINITIALIZED,
"variable `%s` may be used uninitialized in this function", v->name))
{
return false;
}
}
}
return true;
}

1
main.c
View file

@ -383,6 +383,7 @@ int main(int argc, char **argv) {
options_set(opts_warn, WARN_FIELD_REDECLARED, true);
options_set(opts_warn, WARN_TOO_FEW_PARAMETERS, true);
options_set(opts_warn, WARN_MISSING_RETURN_VALUES, true);
options_set(opts_warn, WARN_USED_UNINITIALIZED, true);
if (!options_parse(argc, argv)) {
return usage();

1
warns.def
View file

@ -4,6 +4,7 @@
GMQCC_DEFINE_FLAG(DEBUG)
GMQCC_DEFINE_FLAG(UNUSED_VARIABLE)
GMQCC_DEFINE_FLAG(USED_UNINITIALIZED)
GMQCC_DEFINE_FLAG(UNKNOWN_CONTROL_SEQUENCE)
GMQCC_DEFINE_FLAG(EXTENSIONS)
GMQCC_DEFINE_FLAG(FIELD_REDECLARED)