On Linux/x86_64,

965564eafb721f8000013a3112f1bba8d8fae32b is the first bad commit
commit 965564eafb721f8000013a3112f1bba8d8fae32b
Author: Richard Sandiford <richard.sandif...@arm.com>
Date:   Tue Jul 29 15:58:34 2025 +0100

    simplify-rtx: Simplify subregs of logic ops

caused

FAIL: c-c++-common/dfp/convert-bfp-2.c execution test
FAIL: c-c++-common/dfp/convert-bfp-2.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/convert-bfp-2.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/convert-bfp-2.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/convert-bfp-3.c execution test
FAIL: c-c++-common/dfp/convert-bfp-3.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/convert-bfp-3.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/convert-bfp-3.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/convert-bfp-4.c execution test
FAIL: c-c++-common/dfp/convert-bfp-4.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/convert-bfp-4.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/convert-bfp-4.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/convert-bfp-5.c execution test
FAIL: c-c++-common/dfp/convert-bfp-5.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/convert-bfp-5.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/convert-bfp-5.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/convert-int.c execution test
FAIL: c-c++-common/dfp/convert-int.c  -std=gnu++17 execution test
FAIL: c-c++-common/dfp/convert-int.c  -std=gnu++26 execution test
FAIL: c-c++-common/dfp/convert-int.c  -std=gnu++98 execution test
FAIL: c-c++-common/dfp/inf-1.c execution test
FAIL: c-c++-common/dfp/inf-1.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/inf-1.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/inf-1.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/nan-1.c execution test
FAIL: c-c++-common/dfp/nan-1.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/nan-1.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/nan-1.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/operator-assignment.c execution test
FAIL: c-c++-common/dfp/operator-assignment.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/operator-assignment.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/operator-assignment.c  -std=c++98 execution test
FAIL: c-c++-common/dfp/pr39902.c execution test
FAIL: c-c++-common/dfp/pr39902.c  -std=c++17 execution test
FAIL: c-c++-common/dfp/pr39902.c  -std=c++26 execution test
FAIL: c-c++-common/dfp/pr39902.c  -std=c++98 execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-14.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-14.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-17.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-14.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-14.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O2  execution test
FAIL: c-c++-common/torture/builtin-arith-overflow-p-17.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/ubsan/float-cast-overflow-7.c   -O2  execution test
FAIL: c-c++-common/ubsan/float-cast-overflow-7.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: c-c++-common/ubsan/float-cast-overflow-7.c   -O2 -flto 
-fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: decimal/binary-arith.cc  -std=gnu++17 execution test
FAIL: decimal/comparison.cc  -std=gnu++17 execution test
FAIL: decimal/compound-assignment.cc  -std=gnu++17 execution test
FAIL: decimal/compound-assignment-memfunc.cc  -std=gnu++17 execution test
FAIL: decimal/make-decimal.cc  -std=gnu++17 execution test
FAIL: gcc.c-torture/execute/20110418-1.c   -O2  execution test
FAIL: gcc.c-torture/execute/20110418-1.c   -O2 -flto -fno-use-linker-plugin 
-flto-partition=none  execution test
FAIL: gcc.c-torture/execute/20110418-1.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/20110418-1.c   -Os  execution test
FAIL: gcc.c-torture/execute/20141125-1.c   -Os  execution test
FAIL: gcc.c-torture/execute/bitfld-3.c   -Os  execution test
FAIL: gcc.c-torture/execute/pr112758.c   -Os  execution test
FAIL: gcc.c-torture/execute/pr34971.c   -Os  execution test
FAIL: gcc.c-torture/execute/pr65170.c   -O1  execution test
FAIL: gcc.dg/dfp/bitint-5.c execution test
FAIL: gcc.dg/dfp/convert-dfp-round.c execution test
FAIL: gcc.dg/dfp/convert-dfp-round-thread.c execution test
FAIL: gcc.dg/dfp/fe-binop.c execution test
FAIL: gcc.dg/dfp/pr41049.c execution test
FAIL: gcc.dg/pr78213.c dg-regexp 12 not found: "^-fself-test: [0-9]+ pass\(es\) 
in [.0-9]+ seconds$|.*: note: self-tests are not enabled in this build$"
FAIL: gcc.dg/pr78213.c (internal compiler error: in assert_rtx_eq_at, at 
selftest-rtl.cc:57)
FAIL: gcc.dg/pr78213.c (test for excess errors)
FAIL: gcc.dg/torture/bitint-19.c   -O2  execution test
FAIL: gcc.dg/torture/bitint-31.c   -O2  execution test
FAIL: gcc.dg/torture/bitint-38.c   -O2  execution test
FAIL: gcc.dg/torture/bitint-39.c   -O2  execution test
FAIL: gcc.dg/torture/builtin-issignaling-1.c   -O1  execution test
FAIL: gcc.dg/torture/builtin-issignaling-1.c   -O2  execution test
FAIL: gcc.dg/torture/builtin-issignaling-1.c   -O2 -flto -fno-use-linker-plugin 
-flto-partition=none  execution test
FAIL: gcc.dg/torture/builtin-issignaling-1.c   -O2 -flto -fuse-linker-plugin 
-fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/builtin-issignaling-1.c   -O3 -g  execution test
FAIL: gcc.dg/torture/builtin-issignaling-1.c   -Os  execution test
FAIL: gcc.dg/torture/float128-builtin-issignaling-1.c   -O1  execution test
FAIL: gcc.dg/torture/float128-builtin-issignaling-1.c   -O2  execution test
FAIL: gcc.dg/torture/float128-builtin-issignaling-1.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/float128-builtin-issignaling-1.c   -O2 -flto 
-fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/float128-builtin-issignaling-1.c   -O3 -g  execution test
FAIL: gcc.dg/torture/float128-builtin-issignaling-1.c   -Os  execution test
FAIL: gcc.dg/torture/float32x-builtin-issignaling-1.c   -O1  execution test
FAIL: gcc.dg/torture/float32x-builtin-issignaling-1.c   -O2  execution test
FAIL: gcc.dg/torture/float32x-builtin-issignaling-1.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/float32x-builtin-issignaling-1.c   -O2 -flto 
-fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/float32x-builtin-issignaling-1.c   -O3 -g  execution test
FAIL: gcc.dg/torture/float32x-builtin-issignaling-1.c   -Os  execution test
FAIL: gcc.dg/torture/float64-builtin-issignaling-1.c   -O1  execution test
FAIL: gcc.dg/torture/float64-builtin-issignaling-1.c   -O2  execution test
FAIL: gcc.dg/torture/float64-builtin-issignaling-1.c   -O2 -flto 
-fno-use-linker-plugin -flto-partition=none  execution test
FAIL: gcc.dg/torture/float64-builtin-issignaling-1.c   -O2 -flto 
-fuse-linker-plugin -fno-fat-lto-objects  execution test
FAIL: gcc.dg/torture/float64-builtin-issignaling-1.c   -O3 -g  execution test
FAIL: gcc.dg/torture/float64-builtin-issignaling-1.c   -Os  execution test
FAIL: gcc.dg/torture/pr67736.c   -O2  execution test
FAIL: gcc.dg/torture/pr67736.c   -O2 -flto -fno-use-linker-plugin 
-flto-partition=none  execution test
FAIL: gcc.dg/torture/pr67736.c   -O3 -g  execution test
FAIL: gcc.dg/torture/pr67736.c   -Os  execution test
FAIL: gcc.target/i386/iamcu/test_basic_64bit_returning.c execution,  -O1 
FAIL: gcc.target/i386/iamcu/test_basic_64bit_returning.c execution,  -O2 
FAIL: gcc.target/i386/iamcu/test_basic_64bit_returning.c execution,  -O3 -g 
FAIL: gcc.target/i386/iamcu/test_basic_64bit_returning.c execution,  -Og -g 
FAIL: gcc.target/i386/iamcu/test_basic_64bit_returning.c execution,  -Os 
FAIL: gcc.target/i386/pr78904-1b.c scan-assembler-not movb
FAIL: gcc.target/i386/pr78904-1b.c scan-assembler-not movzbl
FAIL: gcc.target/i386/pr82524-3.c scan-assembler-not movzbl

with GCC configured with

../../gcc/configure 
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-2614/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="dfp.exp=c-c++-common/dfp/convert-bfp-2.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-2.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-3.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-3.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-4.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-4.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-5.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-bfp-5.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-int.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/convert-int.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/inf-1.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/inf-1.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/nan-1.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/nan-1.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/operator-assignment.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/operator-assignment.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/pr39902.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=c-c++-common/dfp/pr39902.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-14.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-14.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-17.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-17.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-p-14.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-p-14.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-p-17.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=c-c++-common/torture/builtin-arith-overflow-p-17.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="ubsan.exp=c-c++-common/ubsan/float-cast-overflow-7.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="ubsan.exp=c-c++-common/ubsan/float-cast-overflow-7.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/binary-arith.cc 
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/binary-arith.cc 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/comparison.cc --target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/comparison.cc --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/compound-assignment.cc 
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/compound-assignment.cc 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/compound-assignment-memfunc.cc 
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/compound-assignment-memfunc.cc 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/make-decimal.cc 
--target_board='unix{-m32}'"
$ cd {build_dir}/x86_64-linux/libstdc++-v3/testsuite && make check 
RUNTESTFLAGS="conformance.exp=decimal/make-decimal.cc 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/20110418-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/20110418-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/20141125-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/20141125-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/bitfld-3.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/bitfld-3.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr112758.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr112758.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr34971.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr34971.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr65170.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="execute.exp=gcc.c-torture/execute/pr65170.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/bitint-5.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/bitint-5.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/convert-dfp-round.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/convert-dfp-round.c --target_board='unix{-m32\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/convert-dfp-round-thread.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/convert-dfp-round-thread.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/fe-binop.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/fe-binop.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/pr41049.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dfp.exp=gcc.dg/dfp/pr41049.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr78213.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr78213.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-19.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-19.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-19.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-19.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-31.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-31.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-38.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-38.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-38.c 
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-38.c 
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-39.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/bitint-39.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/builtin-issignaling-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/builtin-issignaling-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/float128-builtin-issignaling-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/float128-builtin-issignaling-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/float32x-builtin-issignaling-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/float32x-builtin-issignaling-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/float64-builtin-issignaling-1.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/float64-builtin-issignaling-1.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/pr67736.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/pr67736.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="abi-iamcu.exp=gcc.target/i386/iamcu/test_basic_64bit_returning.c 
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="abi-iamcu.exp=gcc.target/i386/iamcu/test_basic_64bit_returning.c 
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78904-1b.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr78904-1b.c --target_board='unix{-m64\ 
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr82524-3.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check 
RUNTESTFLAGS="i386.exp=gcc.target/i386/pr82524-3.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.)

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