On Linux/x86_64,

55cc4377a310f00b0790eb2ab218fe130f63a408 is the first bad commit
commit 55cc4377a310f00b0790eb2ab218fe130f63a408
Author: Stefan Schulze Frielinghaus <[email protected]>
Date:   Thu Dec 4 09:36:24 2025 +0100

    lra: Honor exclude start regs while reusing reloads

caused

FAIL: gcc.dg/asm-hard-reg-9.c (test for excess errors)

with GCC configured with

../../gcc/configure 
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-5879/usr 
--enable-clocale=gnu --with-system-zlib --with-demangler-in-ld 
--with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl 
--enable-libmpx x86_64-linux --disable-bootstrap

To reproduce:

$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/asm-hard-reg-9.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/asm-hard-reg-9.c 
--target_board='unix{-m32\ -march=cascadelake}'"

(Please directly reply to this email for question about this report.)
(If you met problems with cascadelake related, disabling AVX512F in command 
line might save that.)
(However, please make sure that there is no potential problems with AVX512.)

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