{"id":2226293,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2226293/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhubwh7m90.gcc.gcc-TEST.pinskia.33.1.3@forge-stage.sourceware.org/","project":{"id":17,"url":"http://patchwork.ozlabs.org/api/1.2/projects/17/?format=json","name":"GNU Compiler Collection","link_name":"gcc","list_id":"gcc-patches.gcc.gnu.org","list_email":"gcc-patches@gcc.gnu.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"","list_archive_url":null,"date":"2026-04-22T10:49:12","name":"[v1,03/15] testcase: Add testcase for shrink wrapping of vector::push_back [PR118502]","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"261bf39e94294f639191894b7cd82f9dbeab7363","submitter":{"id":93219,"url":"http://patchwork.ozlabs.org/api/1.2/people/93219/?format=json","name":"Andrew Pinski via Sourceware Forge","email":"forge-bot+pinskia@forge-stage.sourceware.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhubwh7m90.gcc.gcc-TEST.pinskia.33.1.3@forge-stage.sourceware.org/mbox/","series":[{"id":500990,"url":"http://patchwork.ozlabs.org/api/1.2/series/500990/?format=json","web_url":"http://patchwork.ozlabs.org/project/gcc/list/?series=500990","date":"2026-04-22T10:49:12","name":"copy-prop-arg","version":1,"mbox":"http://patchwork.ozlabs.org/series/500990/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226293/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226293/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","gcc-patches@gcc.gnu.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","gcc-patches@gcc.gnu.org"],"Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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server2.sourceware.org","From":"Andrew Pinski via Sourceware Forge\n ","Date":"Wed, 22 Apr 2026 10:49:12 +0000","Subject":"[PATCH v1 03/15] testcase: Add testcase for shrink wrapping of\n vector::push_back [PR118502]","To":"gcc-patches mailing list ","Message-ID":"\n ","X-Mailer":"batrachomyomachia","X-Pull-Request-Organization":"gcc","X-Pull-Request-Repository":"gcc-TEST","X-Pull-Request":"https://forge.sourceware.org/gcc/gcc-TEST/pulls/33","References":"\n ","In-Reply-To":"\n ","X-Patch-URL":"\n https://forge.sourceware.org/pinskia/gcc-TEST/commit/65bed62aff674f38f8a3b58480421d90374ebe17","X-BeenThere":"gcc-patches@gcc.gnu.org","X-Mailman-Version":"2.1.30","Precedence":"list","List-Id":"Gcc-patches mailing list ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Reply-To":"gcc-patches mailing list ,\n pinskia@gcc.gnu.org","Errors-To":"gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org"},"content":"From: Andrew Pinski \n\nLLVM folks noticed that GCC was shrink wrapping the call to vector::push_back.\nSo I thought it was a good idea to commit a testcase to make sure GCC does not regress\nin this area unknowning.\n\nNote the shrink wrapping started with r15-1619-g3b9b8d6cfdf593.\nNote this enables the testcase for x86_64 (!ia32), powerpc, aarch64 and riscv which I tested\nvia godbolt to see the shrink wrapping occurs. Also tested the testcase for both\nx86_64-linux-gnu and aarch64-linux-gnu to make sure I got the target selects correct.\n\n\tPR rtl-optimization/118502\n\ngcc/testsuite/ChangeLog:\n\n\t* g++.dg/opt/shrink-wrapping-vector-1.C: New test.\n\nSigned-off-by: Andrew Pinski \n---\n .../g++.dg/opt/shrink-wrapping-vector-1.C | 17 +++++++++++++++++\n 1 file changed, 17 insertions(+)\n create mode 100644 gcc/testsuite/g++.dg/opt/shrink-wrapping-vector-1.C","diff":"diff --git a/gcc/testsuite/g++.dg/opt/shrink-wrapping-vector-1.C b/gcc/testsuite/g++.dg/opt/shrink-wrapping-vector-1.C\nnew file mode 100644\nindex 000000000000..5ebbc0dab641\n--- /dev/null\n+++ b/gcc/testsuite/g++.dg/opt/shrink-wrapping-vector-1.C\n@@ -0,0 +1,17 @@\n+// { dg-do compile { target { { { i?86-*-* x86_64-*-* } && { ! ia32 } } || { powerpc*-*-* aarch64*-*-* riscv*-*-* } } } }\n+// { dg-options \"-O2 -fdump-rtl-pro_and_epilogue\" }\n+// { dg-skip-if \"requires hosted libstdc++ for vector\" { ! hostedlib } }\n+\n+// PR rtl-optimization/118502\n+\n+// The shrink-wrapping should happen around the slow path of vector::push_back,\n+// The fasth path is just checking if there is enough space and doing a few stores.\n+// We want to verify that shrink wrapping happen always.\n+\n+#include \n+\n+void push_back(std::vector& xs, unsigned char x) {\n+ xs.push_back(x);\n+}\n+\n+/* { dg-final { scan-rtl-dump \"Performing shrink-wrapping\" \"pro_and_epilogue\" } } */\n","prefixes":["v1","03/15"]}