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From: "vsevolod.livinskiy at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/105621] New: [13 Regression] Wrong code with -O3 Date: Mon, 16 May 2022 19:03:58 +0000 [thread overview] Message-ID: <bug-105621-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105621 Bug ID: 105621 Summary: [13 Regression] Wrong code with -O3 Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: vsevolod.livinskiy at gmail dot com Target Milestone: --- Link to the Compiler Explorer: https://godbolt.org/z/jscK4bTP6 Reproducer: #include <stdio.h> unsigned short a = (unsigned short)31272; int b = -1902905271; unsigned int c = 1618489477U; bool d = (bool)0; void test(unsigned short a, int b, unsigned c) __attribute__((noipa)); void test(unsigned short a, int b, unsigned c) { for (int i = 2; i < 24; i += 3) d = b ? a ? c : 2086607777901731118 : 0; } int main() { test(a, b, c); printf("%d\n", (int)d); if (d != 1) __builtin_abort(); } Error: >$ g++ -O2 driver.cpp && ./a.out 1 >$ g++ -O3 driver.cpp && ./a.out 0 Aborted (core dumped) GCC version 13.0.0 20220516 (69c4b5c519f0df37e4903992644cc29682721bc1)
next reply other threads:[~2022-05-16 19:03 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-05-16 19:03 vsevolod.livinskiy at gmail dot com [this message] 2022-05-17 6:58 ` [Bug tree-optimization/105621] " rguenth at gcc dot gnu.org 2022-05-17 10:50 ` marxin at gcc dot gnu.org
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