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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/102511] [12 Regression] GCC produces incorrect code for -O3: first element of the array is skipped Date: Tue, 28 Sep 2021 04:33:52 +0000 [thread overview] Message-ID: <bug-102511-4-vnyEfrbHXQ@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-102511-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102511 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2021-09-28 Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Here is a single file version which shows the problem in the latest trunk: #include <stdio.h> extern char arr_15[]; __attribute__((noipa)) void test(signed char a, unsigned short b, unsigned long long c, unsigned short f) { for (int d = b - 8; d < b; d += 2) for (short e = 0; e < (unsigned short)((f ? 122 : 0) ^ (a ? c : 0)) - 64055; e += 3) arr_15[d] = 42; } char arr_15 [8]; void test(signed char a, unsigned short b, unsigned long long int c, unsigned short f); int main() { test(37, 8, 12325048486467861044ULL, 45936); for (size_t i_0 = 0; i_0 < 8; ++i_0) printf("%d ", arr_15 [i_0]); printf("\n"); } ------------------- CUT ------------ Confirmed; I will change it to one which aborts in a few minutes.
next prev parent reply other threads:[~2021-09-28 4:33 UTC|newest] Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-28 3:11 [Bug tree-optimization/102511] New: " vsevolod.livinskij at frtk dot ru 2021-09-28 4:24 ` [Bug tree-optimization/102511] [12 Regression] " pinskia at gcc dot gnu.org 2021-09-28 4:33 ` pinskia at gcc dot gnu.org [this message] 2021-09-28 4:37 ` pinskia at gcc dot gnu.org 2021-09-28 5:23 ` pinskia at gcc dot gnu.org 2021-09-28 5:37 ` [Bug tree-optimization/102511] [12 Regression] GCC produces incorrect code for -O3: first element of the array is skipped after r12-3903 pinskia at gcc dot gnu.org 2021-09-28 7:36 ` aldyh at gcc dot gnu.org 2021-09-28 7:44 ` pinskia at gcc dot gnu.org 2021-09-28 9:12 ` cvs-commit at gcc dot gnu.org 2021-09-28 9:19 ` aldyh at gcc dot gnu.org 2021-09-28 14:51 ` aldyh at gcc dot gnu.org
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