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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/103302] wrong code with -fharden-compares
Date: Thu, 02 Dec 2021 06:25:32 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103302

--- Comment #8 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 51917
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D51917&action=3Dedit
testcase failing with the patch applied

The attached unreduced testcase is failing with the patch applied, but is OK
without the patch:

$
/repo/gcc-trunk/binary-trunk-r12-5705-20211202014655-g1c5317d6214-checking-=
yes-rtl-df-extra-pr103149-riscv64/bin/riscv64-unknown-linux-gnu-gcc
-O3 -fharden-compares -fno-toplevel-reorder -fno-tree-fre -fno-tree-vrp
-funroll-all-loops xxx.c -static -w
$ qemu-riscv64 -- ./a.out=20
Trace/breakpoint trap=