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From: Eric Botcazou <ebotcazou@libertysurf.fr> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: optimization/9123: [3.2/3.3/3.4 regression ] Internal compiler error in do_SUBST at combine.c:434 Date: Fri, 28 Mar 2003 10:39:00 -0000 [thread overview] Message-ID: <20030328101602.3631.qmail@sources.redhat.com> (raw) The following reply was made to PR optimization/9123; it has been noted by GNATS. From: Eric Botcazou <ebotcazou@libertysurf.fr> To: jason@gcc.gnu.org Cc: gcc-bugs@gcc.gnu.org, khindenburg@cherrynebula.net, nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org Subject: Re: optimization/9123: [3.2/3.3/3.4 regression ] Internal compiler error in do_SUBST at combine.c:434 Date: Fri, 28 Mar 2003 11:17:31 +0100 > Not a c++-specific bug; it's dying because it's trying to substitute > (unsigned char)-1 for a QI reg, but combine doesn't like that because > (HOST_WIDE_INT)255 != (HOST_WIDE_INT)-1. Here's a C testcase: > > typedef unsigned char T; > inline T clamp (T in, T min, T max) > { > return in <= min ? min : in >= max ? max : in; > } > unsigned char f (int i) > { > return clamp (i, 0, 255); > } On which versions and with which options does this C testcase fail? -- Eric Botcazou
next reply other threads:[~2003-03-28 10:16 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-28 10:39 Eric Botcazou [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-03-28 22:06 ebotcazou 2003-03-28 20:36 Eric Botcazou 2003-03-28 17:16 Jason Merrill 2003-03-22 21:46 Janis Johnson 2003-03-10 22:38 jason 2003-03-10 22:37 jason
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