https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114052
vvinayag at arm dot com changed:
What |Removed |Added
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CC| |vvinayag at arm dot com
--- Comment #18 from vvinayag at arm dot com ---
(In reply to GCC Commits from comment #17)
> The releases/gcc-14 branch has been updated by Richard Biener
> <rgue...@gcc.gnu.org>:
>
> https://gcc.gnu.org/g:c886bd9ab21429a11bea393b5a6e7438a1d924ef
>
> commit r14-11329-gc886bd9ab21429a11bea393b5a6e7438a1d924ef
> Author: Richard Biener <rguent...@suse.de>
> Date: Wed Jan 29 13:25:14 2025 +0100
>
> tree-optimization/114052 - consider infinite sub-loops when lowering
> iter bound
>
> When we walk stmts to find always executed stmts with UB in the last
> iteration to be able to reduce the iteration count by one we fail
> to consider infinite subloops in the last iteration that would make
> such stmt not execute. The following adds this.
>
> PR tree-optimization/114052
> * tree-ssa-loop-niter.cc (maybe_lower_iteration_bound): Check
> for infinite subloops we might not exit.
>
> * gcc.dg/pr114052-1.c: New testcase.
For bare-metal targets (aarch64-none-elf, arm-none-eabi), gcc.dg/pr114052-1.c
seems to be UNSUPPORTED in trunk.
However, when using releases/gcc-14, gcc.dg/pr114052-1.c FAILs with this
message:
pr114052-1.c:(.text.startup+0x24): undefined reference to `sigaction'
collect2: error: ld returned 1 exit status
compiler exited with status 1
FAIL: gcc.dg/pr114052-1.c (test for excess errors)
Excess errors:
pr114052-1.c:(.text.startup+0x24): undefined reference to `sigaction'
I am not sure whether this is related, but when I had a look to see what's
different between the patches in trunk and gcc-14:
The patch in trunk has an additional requirement on alarm:
/* { dg-require-effective-target alarm } */
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/testsuite/gcc.dg/pr114052-1.c;h=98e93bf670da79c5b746131418aa15c5396995d0;hb=d1c7837d2d6e5a2997228681166ed8c814891881
