[r14-5456 Regression] FAIL: gcc.c-torture/execute/pr82524.c -Os (test for excess errors) on Linux/x86_64

[r14-5456 Regression] FAIL: gcc.c-torture/execute/pr82524.c -Os (test for excess errors) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

b42a09b258c3ed8d1368e0ef0948034dcf0f8ac9 is the first bad commit
commit b42a09b258c3ed8d1368e0ef0948034dcf0f8ac9
Author: Uros Bizjak <ubizjak@gmail.com>
Date:   Tue Nov 14 18:34:43 2023 +0100

    i386: Generate strict_low_part QImode insn with high input register

caused

FAIL: gcc.c-torture/execute/pr82524.c   -O1  (internal compiler error: in extract_insn, at recog.cc:2804)
FAIL: gcc.c-torture/execute/pr82524.c   -O1  (test for excess errors)
FAIL: gcc.c-torture/execute/pr82524.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (internal compiler error: in extract_insn, at recog.cc:2804)
FAIL: gcc.c-torture/execute/pr82524.c   -O2 -flto -fno-use-linker-plugin -flto-partition=none  (test for excess errors)
FAIL: gcc.c-torture/execute/pr82524.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (internal compiler error: in extract_insn, at recog.cc:2804)
FAIL: gcc.c-torture/execute/pr82524.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: gcc.c-torture/execute/pr82524.c   -O2  (internal compiler error: in extract_insn, at recog.cc:2804)
FAIL: gcc.c-torture/execute/pr82524.c   -O2  (test for excess errors)
FAIL: gcc.c-torture/execute/pr82524.c   -O3 -g  (internal compiler error: in extract_insn, at recog.cc:2804)
FAIL: gcc.c-torture/execute/pr82524.c   -O3 -g  (test for excess errors)
FAIL: gcc.c-torture/execute/pr82524.c   -Os  (internal compiler error: in extract_insn, at recog.cc:2804)
FAIL: gcc.c-torture/execute/pr82524.c   -Os  (test for excess errors)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-5456/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="execute.exp=gcc.c-torture/execute/pr82524.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr82524.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr82524.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr82524.c --target_board='unix{-m64\ -march=cascadelake}'"

(Please do not reply to this email, for question about this report, contact me at haochen dot jiang at intel.com.)
(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.)