public inbox for gcc-cvs@sourceware.org help / color / mirror / Atom feed
From: Richard Biener <rguenth@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org Subject: [gcc r11-10303] tree-optimization/106112 - fix CSE from wider operation Date: Tue, 11 Oct 2022 13:04:23 +0000 (GMT) [thread overview] Message-ID: <20221011130423.9F75C3851172@sourceware.org> (raw) https://gcc.gnu.org/g:b7878f05553bcf569a987dff8a7ef8b045b8d26c commit r11-10303-gb7878f05553bcf569a987dff8a7ef8b045b8d26c Author: Richard Biener <rguenther@suse.de> Date: Tue Jun 28 13:57:29 2022 +0200 tree-optimization/106112 - fix CSE from wider operation The following fixes a mistake in looking up an extended operand in the CSE of a truncated operation. 2022-06-28 Richard Biener <rguenther@suse.de> PR tree-optimization/106112 * tree-ssa-sccvn.c (valueized_wider_op): Properly extend a constant operand according to its type. * gcc.dg/torture/pr106112.c: New testcase. (cherry picked from commit 2dbb45d6dc0d20dc159b3d8e27ebb6825074827a) Diff: --- gcc/testsuite/gcc.dg/torture/pr106112.c | 16 ++++++++++++++++ gcc/tree-ssa-sccvn.c | 2 +- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/gcc/testsuite/gcc.dg/torture/pr106112.c b/gcc/testsuite/gcc.dg/torture/pr106112.c new file mode 100644 index 00000000000..bd7f63c0935 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr106112.c @@ -0,0 +1,16 @@ +/* { dg-do run } */ + +__INT32_TYPE__ a = 5, b, c, d; +__UINT64_TYPE__ e = 20862985922; +int main() +{ + __UINT32_TYPE__ f = 4294967292; + e = e | f; + c = -1 % ((~f ^ 4294967292) - (e - d)); + b = ~-~e % ~-d; + if (b) + a = 0; + if (a < 1) + __builtin_abort(); + return 0; +} diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index eaa97566d35..5d773dd3239 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -4843,7 +4843,7 @@ valueized_wider_op (tree wide_type, tree op, bool allow_truncate) /* For constants simply extend it. */ if (TREE_CODE (op) == INTEGER_CST) - return wide_int_to_tree (wide_type, wi::to_wide (op)); + return wide_int_to_tree (wide_type, wi::to_widest (op)); return NULL_TREE; }
reply other threads:[~2022-10-11 13:04 UTC|newest] Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20221011130423.9F75C3851172@sourceware.org \ --to=rguenth@gcc.gnu.org \ --cc=gcc-cvs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).