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From: Falk Hueffner <falk.hueffner@student.uni-tuebingen.de> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: c/7696: Spurious shift warning Date: Sun, 06 Apr 2003 15:26:00 -0000 [thread overview] Message-ID: <20030406152600.9796.qmail@sources.redhat.com> (raw) The following reply was made to PR c/7696; it has been noted by GNATS. From: Falk Hueffner <falk.hueffner@student.uni-tuebingen.de> To: "Christian Ehrhardt" <ehrhardt@mathematik.uni-ulm.de> Cc: gcc-gnats@gcc.gnu.org, schwab@suse.de, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org, gcc-prs@gcc.gnu.org Subject: Re: c/7696: Spurious shift warning Date: 06 Apr 2003 16:50:37 +0200 "Christian Ehrhardt" <ehrhardt@mathematik.uni-ulm.de> writes: > struct ia64_psr { > unsigned long cpl : 2; > } x = {1}; > > unsigned long y = ((unsigned long) x.cpl) << 40; > > According to gdb the cast is thrown away early (build_binary_op > doesn't see it at all), probably because the bitfield is of type > unsigned long. All casts of bit-fields to the same type get discarded. This is a very long standing bug and has already been reported as c/3325, c/3326, c/6346, c/6515 and target/9620. We also have xfailing gcc.c-torture/execute/bitfld-1.c for it. -- Falk
next reply other threads:[~2003-04-06 15:26 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-04-06 15:26 Falk Hueffner [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-04-06 12:26 Christian Ehrhardt 2003-01-08 2:15 bangerth 2002-08-23 5:06 Andreas Schwab
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