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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/43629] [4.3/4.4 Regression] Struct to register optimization fails Date: Fri, 02 Apr 2010 11:32:00 -0000 [thread overview] Message-ID: <20100402113154.32703.qmail@sourceware.org> (raw) In-Reply-To: <bug-43629-18994@http.gcc.gnu.org/bugzilla/> ------- Comment #1 from rguenth at gcc dot gnu dot org 2010-04-02 11:31 ------- Confirmed. Yet another SRA to bitfield magic issue. Workaround: -fno-tree-sra. struct A { short A1 ; short A2 ; int A3 ; }; static struct A __attribute__((noinline)) foo(int b) { struct A result; result.A1 = (short)0; result.A2 = (short)0; /* result.A3 is intentionally not initialized */ if (b) { result.A1 = (short)1; result.A2 = (short)2; result.A3 = 3; return result; } return result; } extern void abort (void); int main() { struct A myA = foo(0); if (myA.A1 != 0) abort (); return 0; } -- rguenth at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Component|c |tree-optimization Ever Confirmed|0 |1 Keywords| |wrong-code Known to fail| |4.3.0 4.3.4 4.4.0 4.4.3 Known to work| |4.2.4 4.5.0 Last reconfirmed|0000-00-00 00:00:00 |2010-04-02 11:31:52 date| | Summary|Struct to register |[4.3/4.4 Regression] Struct |optimization fails |to register optimization | |fails Target Milestone|--- |4.3.5 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43629
next prev parent reply other threads:[~2010-04-02 11:32 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-04-02 9:46 [Bug c/43629] New: " julien dot etienne at gmail dot com 2010-04-02 11:32 ` rguenth at gcc dot gnu dot org [this message] 2010-04-02 11:47 ` [Bug tree-optimization/43629] [4.3/4.4 Regression] " rguenth at gcc dot gnu dot org 2010-04-02 12:51 ` [Bug tree-optimization/43629] [4.3/4.4/4.5 " rguenth at gcc dot gnu dot org 2010-04-02 15:03 ` julien dot etienne at gmail dot com 2010-04-02 15:05 ` rguenther at suse dot de 2010-04-02 16:50 ` rguenth at gcc dot gnu dot org 2010-04-02 16:51 ` [Bug tree-optimization/43629] [4.3/4.4 " rguenth at gcc dot gnu dot org 2010-04-02 20:12 ` julien dot etienne at gmail dot com 2010-04-03 19:38 ` mikpe at it dot uu dot se 2010-04-03 19:53 ` rguenth at gcc dot gnu dot org 2010-04-07 15:41 ` rguenth at gcc dot gnu dot org 2010-04-07 15:44 ` [Bug tree-optimization/43629] [4.3 " rguenth at gcc dot gnu dot org 2010-04-12 8:51 ` julien dot etienne at gmail dot com 2010-04-12 9:01 ` rguenther at suse dot de 2010-04-20 13:08 ` rguenth at gcc dot gnu dot org 2010-04-20 13:09 ` rguenth at gcc dot gnu dot org 2010-04-23 21:12 ` julien dot etienne at gmail dot com
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