public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "amker.cheng at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/51867] GCC generates inconsistent code for same sources calling builtin calls, like sqrtf Date: Tue, 17 Jan 2012 10:43:00 -0000 [thread overview] Message-ID: <bug-51867-4-rAr8NE3Mg1@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-51867-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51867 --- Comment #3 from amker.cheng <amker.cheng at gmail dot com> 2012-01-17 10:35:14 UTC --- test case c-c++-common/dfp/signbit-2.c depends on this check. the case is like: --------------------------------------------------------------------- /* { dg-options "-O0" } */ /* Check that the compiler uses builtins for signbit; if not the link will fail because library functions are in libm. */ #include "dfp-dbg.h" volatile _Decimal32 sd = 2.3df; volatile _Decimal64 dd = -4.5dd; volatile _Decimal128 tf = 5.3dl; volatile float f = 1.2f; volatile double d = -7.8; volatile long double ld = 3.4L; EXTERN int signbitf (float); EXTERN int signbit (double); EXTERN int signbitl (long double); EXTERN int signbitd32 (_Decimal32); EXTERN int signbitd64 (_Decimal64); EXTERN int signbitd128 (_Decimal128); int main () { if (signbitf (f) != 0) FAILURE if (signbit (d) == 0) FAILURE if (signbitl (ld) != 0) FAILURE if (signbitd32 (sd) != 0) FAILURE if (signbitd64 (dd) == 0) FAILURE if (signbitd128 (tf) != 0) FAILURE FINISH } It is compiled without optimization and will fail if no builtin_* functions are used. Not sure it is intended or not.
next prev parent reply other threads:[~2012-01-17 10:36 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-01-16 10:15 [Bug middle-end/51867] New: " amker.cheng at gmail dot com 2012-01-16 10:19 ` [Bug middle-end/51867] " amker.cheng at gmail dot com 2012-01-16 14:45 ` rguenth at gcc dot gnu.org 2012-01-17 10:43 ` amker.cheng at gmail dot com [this message] 2012-02-09 9:38 ` amker at gcc dot gnu.org 2012-06-18 2:03 ` amker.cheng at gmail dot com 2022-01-06 3:42 ` pinskia at gcc dot gnu.org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=bug-51867-4-rAr8NE3Mg1@http.gcc.gnu.org/bugzilla/ \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).