From: Jakub Jelinek <jakub@redhat.com>
To: Richard Biener <rguenther@suse.de>,
Rainer Orth <ro@cebitec.uni-bielefeld.de>
Cc: gcc-patches@gcc.gnu.org, jason@redhat.com
Subject: [PATCH] Fix -Wunused-var-35.C (was Re: [PATCH][C++] Improve compile-time by ordering expensive checks last)
Date: Thu, 25 Apr 2019 11:36:00 -0000 [thread overview]
Message-ID: <20190425112739.GJ21066@tucnak> (raw)
In-Reply-To: <yddk1fijq9f.fsf@CeBiTec.Uni-Bielefeld.DE>
On Thu, Apr 25, 2019 at 01:09:00PM +0200, Rainer Orth wrote:
> > cp/
> > * call.c (null_ptr_cst_p): Order checks according to expensiveness.
> > (conversion_null_warnings): Likewise.
> > * typeck.c (same_type_ignoring_top_level_qualifiers_p): Return
> > early if type1 == type2.
>
> this patch caused
>
> +XPASS: g++.dg/warn/Wunused-var-35.C -std=gnu++98 bug (test for warnings, line 14)
>
> First seen on i386-pc-solaris2.11 and sparc-sun-solaris2.11, according
> to gcc-testresults everywhere. Confirmed by reverting the patch locally
> and re-testing the affected testcase.
I can reproduce that too, seems to be the
@@ -6896,8 +6897,8 @@
}
/* Handle zero as null pointer warnings for cases other
than EQ_EXPR and NE_EXPR */
- else if (null_ptr_cst_p (expr) &&
- (TYPE_PTR_OR_PTRMEM_P (totype) || NULLPTR_TYPE_P (totype)))
+ else if ((TYPE_PTR_OR_PTRMEM_P (totype) || NULLPTR_TYPE_P (totype))
+ && null_ptr_cst_p (expr))
{
location_t loc = get_location_for_expr_unwinding_for_system_header (expr);
maybe_warn_zero_as_null_pointer_constant (expr, loc);
hunk. The Wunused-var-35.C patch hasn't been posted to gcc-patches, but
judging from the corresponding PR, I'd say the right thing is below.
Regtested on x86_64-linux and i686-linux, ok for trunk?
2019-04-25 Jakub Jelinek <jakub@redhat.com>
PR c++/44648
* g++.dg/warn/Wunused-var-35.C: Remove xfail.
--- gcc/testsuite/g++.dg/warn/Wunused-var-35.C.jj 2019-02-04 09:44:31.365413407 +0100
+++ gcc/testsuite/g++.dg/warn/Wunused-var-35.C 2019-04-25 13:24:49.717065815 +0200
@@ -11,9 +11,8 @@ int main()
else
return 1;
- if (const bool b2 = 1) // { dg-warning "\\\[-Wunused-variable\\\]" "bug" { xfail c++98_only } }
+ if (const bool b2 = 1) // { dg-warning "\\\[-Wunused-variable\\\]" }
return 0;
else
return 1;
}
-
Jakub
next prev parent reply other threads:[~2019-04-25 11:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-16 12:34 [PATCH][C++] Improve compile-time by ordering expensive checks last Richard Biener
2019-04-17 15:35 ` Richard Biener
2019-04-19 5:32 ` Jason Merrill
2019-04-25 11:27 ` Rainer Orth
2019-04-25 11:36 ` Jakub Jelinek [this message]
2019-04-25 11:48 ` [PATCH] Fix -Wunused-var-35.C (was Re: [PATCH][C++] Improve compile-time by ordering expensive checks last) Richard Biener
2019-04-25 11:55 ` Jakub Jelinek
2019-04-25 12:16 ` Richard Biener
2019-04-25 21:14 ` Jason Merrill
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