From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1464) id 70DDD3858C83; Tue, 15 Feb 2022 22:53:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 70DDD3858C83 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Peter Bergner To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-7254] rs6000: Retry tbegin. instructions that can fail intermittently X-Act-Checkin: gcc X-Git-Author: Peter Bergner X-Git-Refname: refs/heads/master X-Git-Oldrev: e15425e899e4a9eec768cf74aaf36cdbf1d29913 X-Git-Newrev: 3d8d8e34f796fefda53be9a6cec7c6c950856a14 Message-Id: <20220215225319.70DDD3858C83@sourceware.org> Date: Tue, 15 Feb 2022 22:53:19 +0000 (GMT) X-BeenThere: gcc-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Feb 2022 22:53:19 -0000 https://gcc.gnu.org/g:3d8d8e34f796fefda53be9a6cec7c6c950856a14 commit r12-7254-g3d8d8e34f796fefda53be9a6cec7c6c950856a14 Author: Peter Bergner Date: Tue Feb 15 16:51:32 2022 -0600 rs6000: Retry tbegin. instructions that can fail intermittently The HTM tbegin. instruction can fail intermittently due to many reasons. This can lead to htm-1.c FAILing from time to time. The solution is to allow retrying the instruction a few times before aborting. 2022-02-15 Peter Bergner gcc/testsuite/ * gcc.target/powerpc/htm-1.c: Retry intermittent failing tbegins. Diff: --- gcc/testsuite/gcc.target/powerpc/htm-1.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/gcc/testsuite/gcc.target/powerpc/htm-1.c b/gcc/testsuite/gcc.target/powerpc/htm-1.c index f27e32ca281..399a7ec8812 100644 --- a/gcc/testsuite/gcc.target/powerpc/htm-1.c +++ b/gcc/testsuite/gcc.target/powerpc/htm-1.c @@ -12,14 +12,21 @@ main (void) { long i; unsigned long mask = 0; + unsigned long retry_count = 0; repeat: if (__builtin_tbegin (0)) { mask++; + retry_count = 0; } else - abort(); + { + /* Retry a limited number of times before aborting. */ + if (retry_count++ < 10) + goto repeat; + abort (); + } if (mask == 1) {