From 8d093dba97a54597645292b551c6e9bc09aa8f9e Mon Sep 17 00:00:00 2001 From: rguenth Date: Tue, 10 Feb 2009 14:54:13 +0000 Subject: [PATCH] 2009-02-10 Richard Guenther PR tree-optimization/39132 * tree-loop-distribution.c (todo): New global var. (generate_memset_zero): Trigger TODO_rebuild_alias. (tree_loop_distribution): Return todo. * gcc.dg/torture/pr39132.c: New testcase. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@144060 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 7 +++++++ gcc/testsuite/ChangeLog | 5 +++++ gcc/testsuite/gcc.dg/torture/pr39132.c | 34 ++++++++++++++++++++++++++++++++++ gcc/tree-loop-distribution.c | 9 ++++++++- 4 files changed, 54 insertions(+), 1 deletion(-) create mode 100644 gcc/testsuite/gcc.dg/torture/pr39132.c diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d18f8cc..d29668a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2009-02-10 Richard Guenther + + PR tree-optimization/39132 + * tree-loop-distribution.c (todo): New global var. + (generate_memset_zero): Trigger TODO_rebuild_alias. + (tree_loop_distribution): Return todo. + 2009-02-10 H.J. Lu PR target/39119 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 15a7fac..02a65b9 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2009-02-10 Richard Guenther + + PR tree-optimization/39132 + * gcc.dg/torture/pr39132.c: New testcase. + 2009-02-10 H.J. Lu PR target/39119 diff --git a/gcc/testsuite/gcc.dg/torture/pr39132.c b/gcc/testsuite/gcc.dg/torture/pr39132.c new file mode 100644 index 0000000..f6e2907 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr39132.c @@ -0,0 +1,34 @@ +/* { dg-do run } */ +/* { dg-options "-ftree-loop-distribution" } */ + +extern void abort(void); + +struct epic_private +{ + unsigned int *rx_ring; + unsigned int rx_skbuff[5]; +}; + +int +main (void) +{ + struct epic_private ep; + unsigned int rx_ring[5]; + int i; + + ep.rx_skbuff[0] = 5; + + ep.rx_ring = rx_ring; + + for (i = 0; i < 5; i++) + { + ep.rx_ring[i] = i; + ep.rx_skbuff[i] = 0; + } + + if (ep.rx_skbuff[0] != 0) + abort (); + + return 0; +} + diff --git a/gcc/tree-loop-distribution.c b/gcc/tree-loop-distribution.c index 8eca7c0..080ecea 100644 --- a/gcc/tree-loop-distribution.c +++ b/gcc/tree-loop-distribution.c @@ -77,6 +77,9 @@ static bitmap remaining_stmts; predecessor a node that writes to memory. */ static bitmap upstream_mem_writes; +/* TODOs we need to run after the pass. */ +static unsigned int todo; + /* Update the PHI nodes of NEW_LOOP. NEW_LOOP is a duplicate of ORIG_LOOP. */ @@ -331,6 +334,8 @@ generate_memset_zero (gimple stmt, tree op0, tree nb_iter, if (dump_file && (dump_flags & TDF_DETAILS)) fprintf (dump_file, "generated memset zero\n"); + todo |= TODO_rebuild_alias; + end: free_data_ref (dr); return res; @@ -1206,6 +1211,8 @@ tree_loop_distribution (void) loop_iterator li; int nb_generated_loops = 0; + todo = 0; + FOR_EACH_LOOP (li, loop, 0) { VEC (gimple, heap) *work_list = VEC_alloc (gimple, heap, 3); @@ -1237,7 +1244,7 @@ tree_loop_distribution (void) VEC_free (gimple, heap, work_list); } - return 0; + return todo; } static bool -- 2.7.4