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{
    "id": 2229454,
    "url": "http://patchwork.ozlabs.org/api/1.1/patches/2229454/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/20260428091332.DC2294BB592A@sourceware.org/",
    "project": {
        "id": 17,
        "url": "http://patchwork.ozlabs.org/api/1.1/projects/17/?format=api",
        "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
    },
    "msgid": "<20260428091332.DC2294BB592A@sourceware.org>",
    "date": "2026-04-28T09:11:19",
    "name": "[3/4] Use scalar_costs in vect_get_known_peeling_cost",
    "commit_ref": null,
    "pull_url": null,
    "state": "new",
    "archived": false,
    "hash": "aa4a540849957ef0fd8cb02b7d03e073e029beac",
    "submitter": {
        "id": 4338,
        "url": "http://patchwork.ozlabs.org/api/1.1/people/4338/?format=api",
        "name": "Richard Biener",
        "email": "rguenther@suse.de"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/20260428091332.DC2294BB592A@sourceware.org/mbox/",
    "series": [
        {
            "id": 501803,
            "url": "http://patchwork.ozlabs.org/api/1.1/series/501803/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=501803",
            "date": "2026-04-28T09:11:06",
            "name": "[1/4] Simplify vect_get_known_peeling_cost",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/501803/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/2229454/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/2229454/checks/",
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        ],
        "Date": "Tue, 28 Apr 2026 11:11:19 +0200 (CEST)",
        "From": "Richard Biener <rguenther@suse.de>",
        "To": "gcc-patches@gcc.gnu.org",
        "Subject": "[PATCH 3/4] Use scalar_costs in vect_get_known_peeling_cost",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain; charset=US-ASCII",
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        "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org",
        "Message-Id": "<20260428091332.DC2294BB592A@sourceware.org>"
    },
    "content": "The following makes us use the scalar_costs summary when computing\nthe peeling cost part comparing different peelings for alignment.\nThat gets rid of repeated walks of LOOP_VINFO_SCALAR_ITERATION_COST\nand the fallback to builtin_vectorization_cost.\n\nBootstrapped and tested on x86_64-unknown-linux-gnu, pushed.\n\n\t* tree-vect-loop.cc (vect_get_known_peeling_cost): Use\n\tscalar_costs instead of guesstimating it.\n---\n gcc/tree-vect-loop.cc | 14 ++++----------\n 1 file changed, 4 insertions(+), 10 deletions(-)",
    "diff": "diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc\nindex cc40f43c252..94f3d00d60e 100644\n--- a/gcc/tree-vect-loop.cc\n+++ b/gcc/tree-vect-loop.cc\n@@ -3943,16 +3943,10 @@ vect_get_known_peeling_cost (loop_vec_info loop_vinfo, int peel_iters_prologue)\n \tretval += builtin_vectorization_cost (cond_branch_taken, NULL_TREE, 0);\n     }\n \n-  stmt_info_for_cost *si;\n-  int j;\n-  if (peel_iters_prologue)\n-    FOR_EACH_VEC_ELT (LOOP_VINFO_SCALAR_ITERATION_COST (loop_vinfo), j, si)\n-      retval += (builtin_vectorization_cost (si->kind, NULL_TREE, si->misalign)\n-\t\t * peel_iters_prologue);\n-  if (peel_iters_epilogue)\n-    FOR_EACH_VEC_ELT (LOOP_VINFO_SCALAR_ITERATION_COST (loop_vinfo), j, si)\n-      retval += (builtin_vectorization_cost (si->kind, NULL_TREE, si->misalign)\n-\t\t * peel_iters_epilogue);\n+  retval += ((peel_iters_prologue + peel_iters_epilogue)\n+\t     * loop_vinfo->scalar_costs->body_cost ());\n+  retval += (((peel_iters_prologue != 0) + (peel_iters_epilogue != 0))\n+\t     * loop_vinfo->scalar_costs->outside_cost ());\n \n   return retval;\n }\n",
    "prefixes": [
        "3/4"
    ]
}