Hi! On Fri, 31 Oct 2014 16:35:27 -0700, Cesar Philippidis <ce...@codesourcery.com> wrote: > This patch does the following: [...]
> gcc/
> * omp-low.c (oacc_max_threads): New function.
> (lower_reduction_clauses): Use the GOACC thread builtin functions to
> determine the thread count. Handle multiple reduction variables.
> (expand_omp_for_static_nochunk): Likewise.
> (expand_omp_for_static_chunk): Likewise.
> (finalize_reduction_data): General cleanups.
> (process_reduction_data): Use acc_get_device_type to determine nthreads
> at runtime.
I fixed, conservatively, a bootstrap failure in gomp-4_branch's r217183:
commit 7b80846629e7ed87bfd9efe42a7b49712b38c5a6
Author: tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Nov 6 10:04:25 2014 +0000
Fix bootstrap failure.
[...]/source-gcc/gcc/omp-low.c: In function 'void
lower_reduction_clauses(tree, gimple_statement_base**, omp_context*)':
[...]/source-gcc/gcc/omp-low.c:4611:70: error: 'tid' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
lower_reduction_var_helper (stmt_seqp, ctx, tid, var, new_var);
^
cc1plus: all warnings being treated as errors
make[3]: *** [omp-low.o] Error 1
make[3]: Leaving directory `[...]/build-gcc/gcc'
make[2]: *** [all-stage2-gcc] Error 2
make[2]: Leaving directory `[...]/build-gcc'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `[...]/build-gcc'
make: *** [all] Error 2
gcc/
* omp-low.c (lower_reduction_clauses): Initialize tid.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gomp-4_0-branch@217183
138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/ChangeLog.gomp | 4 ++++
gcc/omp-low.c | 2 +-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git gcc/ChangeLog.gomp gcc/ChangeLog.gomp
index d140a35..0bc9080 100644
--- gcc/ChangeLog.gomp
+++ gcc/ChangeLog.gomp
@@ -1,3 +1,7 @@
+2014-11-06 Thomas Schwinge <tho...@codesourcery.com>
+
+ * omp-low.c (lower_reduction_clauses): Initialize tid.
+
2014-11-05 Thomas Schwinge <tho...@codesourcery.com>
* tree-core.h (enum omp_clause_code): Remove OMP_CLAUSE_HOST and
diff --git gcc/omp-low.c gcc/omp-low.c
index 0b45e69..23d9f5a8 100644
--- gcc/omp-low.c
+++ gcc/omp-low.c
@@ -4530,7 +4530,7 @@ lower_reduction_clauses (tree clauses, gimple_seq
*stmt_seqp, omp_context *ctx)
{
gimple_seq sub_seq = NULL;
gimple stmt;
- tree x, c, tid;
+ tree x, c, tid = NULL_TREE;
int count = 0;
/* SIMD reductions are handled in lower_rec_input_clauses. */
Grüße,
Thomas
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