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* [Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment @ 2007-10-21 12:38 burnus at gcc dot gnu dot org 2007-10-21 12:40 ` [Bug fortran/33850] " burnus at gcc dot gnu dot org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: burnus at gcc dot gnu dot org @ 2007-10-21 12:38 UTC (permalink / raw) To: gcc-bugs For integer(4) :: p(4) = (/2,4,1,3/) integer(4) :: q(4) = (/2,4,1,3/) p(q) = (/(i, i = 1, 4)/) gfortran generates an unneeded temporary, which is only needed for integer(4) :: p(4) = (/2,4,1,3/) p(p) = (/(i, i = 1, 4)/) Cf. PR 33749 -- Summary: Unneeded temporary generated for LHS index of array assignment Product: gcc Version: 4.3.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P3 Component: fortran AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: burnus at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33850 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/33850] Unneeded temporary generated for LHS index of array assignment 2007-10-21 12:38 [Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment burnus at gcc dot gnu dot org @ 2007-10-21 12:40 ` burnus at gcc dot gnu dot org 2007-10-23 15:34 ` pault at gcc dot gnu dot org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: burnus at gcc dot gnu dot org @ 2007-10-21 12:40 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from burnus at gcc dot gnu dot org 2007-10-21 12:40 ------- See also http://gcc.gnu.org/ml/fortran/2007-10/msg00298.html -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33850 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/33850] Unneeded temporary generated for LHS index of array assignment 2007-10-21 12:38 [Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment burnus at gcc dot gnu dot org 2007-10-21 12:40 ` [Bug fortran/33850] " burnus at gcc dot gnu dot org @ 2007-10-23 15:34 ` pault at gcc dot gnu dot org 2007-11-27 20:48 ` pault at gcc dot gnu dot org 2007-11-27 20:54 ` pault at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pault at gcc dot gnu dot org @ 2007-10-23 15:34 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from pault at gcc dot gnu dot org 2007-10-23 15:34 ------- As the cause of this, I had better confirm it at least! I am working on the problems with the FORALL patch and have seen a way to fix this problem at the same time. It'll be at least a few days yet, so watch this space. Cheers Paul -- pault at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at gcc dot gnu |pault at gcc dot gnu dot org |dot org | Status|UNCONFIRMED |ASSIGNED Ever Confirmed|0 |1 Last reconfirmed|0000-00-00 00:00:00 |2007-10-23 15:34:00 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33850 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/33850] Unneeded temporary generated for LHS index of array assignment 2007-10-21 12:38 [Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment burnus at gcc dot gnu dot org 2007-10-21 12:40 ` [Bug fortran/33850] " burnus at gcc dot gnu dot org 2007-10-23 15:34 ` pault at gcc dot gnu dot org @ 2007-11-27 20:48 ` pault at gcc dot gnu dot org 2007-11-27 20:54 ` pault at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pault at gcc dot gnu dot org @ 2007-11-27 20:48 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from pault at gcc dot gnu dot org 2007-11-27 20:48 ------- Subject: Bug 33850 Author: pault Date: Tue Nov 27 20:47:55 2007 New Revision: 130472 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=130472 Log: 2007-11-27 Paul Thomas <pault@gcc.gnu.org> PR fortran/29389 *resolve.c (resolve_ordinary_assign): Use find_sym_in_expr to test if a temporary should be written for a vector subscript on the lhs. PR fortran/33850 * restore.c (pure_stmt_function): Add prototype and new function. Calls impure_stmt_fcn. (pure_function): Call it. (impure_stmt_fcn): New function. * expr.c (gfc_traverse_expr): Call *func for all expression types, not just variables. Add traversal of character lengths, iterators and component character lengths and arrayspecs. (expr_set_symbols_referenced): Return false if not a variable. * trans-stmt.c (forall_replace, forall_restore): Ditto. * resolve.c (forall_index): Ditto. (sym_in_expr): New function. (find_sym_in_expr): Rewrite to traverse expression calling sym_in_expr. *trans-decl.c (expr_decls): New function. (generate_expr_decls): Rewrite to traverse expression calling expr_decls. *match.c (check_stmt_fcn): New function. (recursive_stmt_fcn): Rewrite to traverse expression calling check_stmt_fcn. 2007-11-27 Paul Thomas <pault@gcc.gnu.org> PR fortran/29389 * gfortran.dg/stfunc_6.f90: New test. PR fortran/33850 * gfortran.dg/assign_10.f90: New test. Added: trunk/gcc/testsuite/gfortran.dg/assign_10.f90 trunk/gcc/testsuite/gfortran.dg/stfunc_6.f90 Modified: trunk/gcc/fortran/ChangeLog trunk/gcc/fortran/expr.c trunk/gcc/fortran/match.c trunk/gcc/fortran/resolve.c trunk/gcc/fortran/trans-decl.c trunk/gcc/fortran/trans-stmt.c trunk/gcc/testsuite/ChangeLog -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33850 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug fortran/33850] Unneeded temporary generated for LHS index of array assignment 2007-10-21 12:38 [Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment burnus at gcc dot gnu dot org ` (2 preceding siblings ...) 2007-11-27 20:48 ` pault at gcc dot gnu dot org @ 2007-11-27 20:54 ` pault at gcc dot gnu dot org 3 siblings, 0 replies; 5+ messages in thread From: pault at gcc dot gnu dot org @ 2007-11-27 20:54 UTC (permalink / raw) To: gcc-bugs ------- Comment #4 from pault at gcc dot gnu dot org 2007-11-27 20:54 ------- Fixed on trunk. Paul PS Note the need to get the kind right for the index vector in order to eliminate the temporary. -- pault at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution| |FIXED http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33850 ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2007-11-27 20:54 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2007-10-21 12:38 [Bug fortran/33850] New: Unneeded temporary generated for LHS index of array assignment burnus at gcc dot gnu dot org 2007-10-21 12:40 ` [Bug fortran/33850] " burnus at gcc dot gnu dot org 2007-10-23 15:34 ` pault at gcc dot gnu dot org 2007-11-27 20:48 ` pault at gcc dot gnu dot org 2007-11-27 20:54 ` pault at gcc dot gnu dot org
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