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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 middle-end/28545] [4.1 Regression] Wrong code for hoisted multiplication Date: Sat, 14 Oct 2006 10:41:00 -0000 [thread overview] Message-ID: <20061014104052.6987.qmail@sourceware.org> (raw) In-Reply-To: <bug-28545-7172@http.gcc.gnu.org/bugzilla/> ------- Comment #9 from rguenth at gcc dot gnu dot org 2006-10-14 10:40 ------- Much simpler testcase: void foo(int); void solver(int cr) { int x, y, n; for (y = 0; y < cr; y++) for (x = 0; x < cr; x++) { for (n = 0; n < cr; n++) ; foo(cr*cr); } } t35.copyprop1: ;; Function solver (solver) solver (cr) { int n; int y; int x; int D.1293; <bb 0>: goto <bb 6> (<L7>); <L2>:; n_11 = n_3 + 1; # n_3 = PHI <0(4), n_11(1)>; <L3>:; if (n_3 < cr_5) goto <L2>; else goto <L4>; <L4>:; D.1293_9 = cr_5 * cr_5; foo (D.1293_9); x_10 = x_1 + 1; # x_1 = PHI <0(6), x_10(3)>; <L5>:; if (x_1 < cr_5) goto <L3>; else goto <L6>; <L6>:; y_7 = y_2 + 1; # y_2 = PHI <0(0), y_7(5)>; <L7>:; if (y_2 < cr_5) goto <L5>; else goto <L8>; <L8>:; return; } t36.vrp1: solver (cr) { int n; int y; int x; int D.1293; <bb 0>: goto <bb 6> (<L7>); <L2>:; n_11 = n_3 + 1; # n_3 = PHI <0(4), n_11(1)>; <L3>:; if (n_3 < cr_5) goto <L2>; else goto <L4>; <L4>:; D.1293_9 = cr_5 * cr_13; foo (D.1293_9); x_10 = x_1 + 1; # x_1 = PHI <0(6), x_10(3)>; <L5>:; if (x_1 < cr_5) goto <L3>; else goto <L6>; <L6>:; y_7 = y_2 + 1; # y_2 = PHI <0(0), y_7(5)>; <L7>:; if (y_2 < cr_5) goto <L5>; else goto <L8>; <L8>:; return; } (this smells like a tree sharing issue). -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28545
next prev parent reply other threads:[~2006-10-14 10:41 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2006-07-30 18:42 [Bug c/28545] New: " ben at decadentplace dot org dot uk 2006-07-30 18:46 ` [Bug c/28545] " ben at decadentplace dot org dot uk 2006-07-30 19:02 ` [Bug middle-end/28545] " ben at decadentplace dot org dot uk 2006-07-30 19:05 ` [Bug middle-end/28545] [4.1 only] " pinskia at gcc dot gnu dot org 2006-07-30 20:11 ` ben at decadentplace dot org dot uk 2006-07-31 1:41 ` pinskia at gcc dot gnu dot org 2006-07-31 8:23 ` [Bug middle-end/28545] [4.1 Regression] " rguenth at gcc dot gnu dot org 2006-10-14 9:26 ` rguenth at gcc dot gnu dot org 2006-10-14 10:19 ` rguenth at gcc dot gnu dot org 2006-10-14 10:41 ` rguenth at gcc dot gnu dot org [this message] 2006-10-14 11:11 ` rguenth at gcc dot gnu dot org 2006-10-14 14:49 ` rguenth at gcc dot gnu dot org 2006-10-14 15:05 ` patchapp at dberlin dot org 2006-10-14 15:13 ` pinskia at gcc dot gnu dot org 2006-10-14 16:08 ` [Bug tree-optimization/28545] " pinskia at gcc dot gnu dot org 2006-10-14 16:09 ` pinskia at gcc dot gnu dot org 2006-10-16 14:36 ` amacleod at redhat dot com 2006-11-01 18:15 ` mmitchel at gcc dot gnu dot org 2006-11-06 15:15 ` rguenth at gcc dot gnu dot org 2006-11-06 15:17 ` rguenth at gcc dot gnu dot org 2006-11-07 19:37 ` pinskia at gcc dot gnu dot org 2006-11-12 1:49 ` pinskia at gcc dot gnu dot org 2006-11-12 1:49 ` pinskia at gcc dot gnu dot org 2007-01-14 6:07 ` pinskia at gcc dot gnu dot org
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