aboutsummaryrefslogtreecommitdiff
path: root/libgomp
diff options
context:
space:
mode:
authorFeng Xue <fxue@os.amperecomputing.com>2019-06-13 04:17:42 +0000
committerFeng Xue <fxue@gcc.gnu.org>2019-06-13 04:17:42 +0000
commitc29c92c789d93848cc1c929838771bfc68cb272c (patch)
tree10a08875fb9bec9119ac6c0fa419923b9ac48654 /libgomp
parent9b884225bfc609606f9b169b021c4da93feba48e (diff)
downloadgcc-c29c92c789d93848cc1c929838771bfc68cb272c.zip
gcc-c29c92c789d93848cc1c929838771bfc68cb272c.tar.gz
gcc-c29c92c789d93848cc1c929838771bfc68cb272c.tar.bz2
PR tree-optimization/89713 - Assume loop with an exit is finite
gcc/ChangeLog: * doc/invoke.texi (-ffinite-loops): Document new option. * common.opt (-ffinite-loops): New option. * tree-ssa-dce.c (mark_stmt_if_obviously_necessary): Mark IFN_GOACC_LOOP calls as necessary. * tree-ssa-loop-niter.c (finite_loop_p): Assume loop with an exit is finite. * omp-offload.c (oacc_xform_loop): Skip lowering if return value of IFN_GOACC_LOOP call is not used. * opts.c (default_options_table): Enable -ffinite-loops at -O2+. gcc/testsuite/ChangeLog: * g++.dg/tree-ssa/empty-loop.C: New test. * gcc.dg/tree-ssa/dce-2.c: New test. * gcc.dg/const-1.c: Add -fno-finite-loops option. * gcc.dg/graphite/graphite.exp: Likewise. * gcc.dg/loop-unswitch-1.c: Likewise. * gcc.dg/predict-9.c: Likewise. * gcc.dg/pure-2.c: Likewise. * gcc.dg/tree-ssa/20040211-1.c: Likewise. * gcc.dg/tree-ssa/loop-10.c: Likewise. * gcc.dg/tree-ssa/split-path-6.c: Likewise. * gcc.dg/tree-ssa/ssa-thread-12.c: Likewise. libgomp/ChangeLog: * testsuite/libgomp.oacc-c-c++-common/pr84955-1.c: New test. From-SVN: r272234
Diffstat (limited to 'libgomp')
-rw-r--r--libgomp/ChangeLog5
-rw-r--r--libgomp/testsuite/libgomp.oacc-c-c++-common/pr84955-1.c31
2 files changed, 36 insertions, 0 deletions
diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 3487880..35fe548 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-13 Feng Xue <fxue@os.amperecomputing.com>
+
+ PR tree-optimization/89713
+ * testsuite/libgomp.oacc-c-c++-common/pr84955-1.c: New test.
+
2019-06-11 Jakub Jelinek <jakub@redhat.com>
PR target/90811
diff --git a/libgomp/testsuite/libgomp.oacc-c-c++-common/pr84955-1.c b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr84955-1.c
new file mode 100644
index 0000000..44767cd
--- /dev/null
+++ b/libgomp/testsuite/libgomp.oacc-c-c++-common/pr84955-1.c
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-cddce2 -ffinite-loops" } */
+
+int
+f1 (void)
+{
+ int i, j;
+
+#pragma acc parallel loop tile(2,3)
+ for (i = 1; i < 10; i++)
+ for (j = 1; j < 10; j++)
+ for (;;)
+ ;
+
+ return i + j;
+}
+
+int
+f2 (void)
+{
+ int i, j, k;
+
+#pragma acc parallel loop tile(2,3)
+ for (i = 1; i < 10; i++)
+ for (j = 1; j < 10; j++)
+ for (k = 1; k < 10; k++)
+ ;
+
+ return i + j;
+}
+/* { dg-final { scan-tree-dump-not "if" "cddce2"} } */