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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/100994] [12 Regression] wrong code with "-O1 -finline-small-functions -fipa-cp"
Date: Wed, 09 Jun 2021 19:07:07 +0000	[thread overview]
Message-ID: <bug-100994-4-qMwBPGtPdQ@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-100994-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100994

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Consider with the same -O2 -fno-early-inlining -fno-tree-sra -fno-tree-fre
flags:

const struct S { unsigned b : 4; unsigned c : 9; } d;
__attribute__((noipa)) void foo (void) {}
static int bar (const struct S l) {
  ((struct S *)&l)->b += 2;
  ((struct S *)&l)->c += 4;
  foo ();
  return l.b + l.c;
}
__attribute__((noipa)) int baz (void) { return 2; }
int main () { const struct S d = { 1, baz () }; bar (d); return d.b - 1; }

This used to exit with 0 in r12-433 but exits with 2 in r12-434.

  parent reply	other threads:[~2021-06-09 19:07 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-09 14:29 [Bug ipa/100994] New: " suochenyao at 163 dot com
2021-06-09 18:24 ` [Bug ipa/100994] [12 Regression] " jakub at gcc dot gnu.org
2021-06-09 18:31 ` jakub at gcc dot gnu.org
2021-06-09 18:39 ` jakub at gcc dot gnu.org
2021-06-09 19:02 ` jakub at gcc dot gnu.org
2021-06-09 19:07 ` jakub at gcc dot gnu.org [this message]
2021-06-09 19:41 ` msebor at gcc dot gnu.org
2021-06-09 21:28 ` ebotcazou at gcc dot gnu.org
2021-06-09 21:30 ` ebotcazou at gcc dot gnu.org
2021-06-09 21:32 ` pinskia at gcc dot gnu.org

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