From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id B1087385841F; Mon, 3 Jan 2022 09:50:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B1087385841F MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Richard Biener To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-6182] tree-optimization/66502 - add testcase X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/heads/master X-Git-Oldrev: 7adcbafe45f8001b698967defe682687b52c0007 X-Git-Newrev: cd83fd98a7e769ac7ded28377984f68238812a26 Message-Id: <20220103095044.B1087385841F@sourceware.org> Date: Mon, 3 Jan 2022 09:50:44 +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: Mon, 03 Jan 2022 09:50:44 -0000 https://gcc.gnu.org/g:cd83fd98a7e769ac7ded28377984f68238812a26 commit r12-6182-gcd83fd98a7e769ac7ded28377984f68238812a26 Author: Richard Biener Date: Mon Jan 3 10:48:57 2022 +0100 tree-optimization/66502 - add testcase This adds the second testcase which we now also handle eliminating a redundant PHI node. 2022-01-03 Richard Biener PR tree-optimization/66502 * gcc.dg/tree-ssa/ssa-fre-98.c: New testcase. Diff: --- gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c new file mode 100644 index 00000000000..3d286099b25 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-98.c @@ -0,0 +1,18 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-fre1-details" } */ + +int foo (int a, int s, unsigned int k) +{ + int i = a, j = a; + do + { + i += s; + j += j; + j -= a; + } + while (k--); + return j+i; +} + +/* We want the redundant PHI for j to disappear. */ +/* { dg-final { scan-tree-dump "Replaced redundant PHI node defining j" "fre1" } } */