On Linux/x86_64,
b41be002eda047093bbf4757cb65ffb4d525cc35 is the first bad commit
commit b41be002eda047093bbf4757cb65ffb4d525cc35
Author: Roger Sayle <ro...@nextmovesoftware.com>
Date: Fri Nov 26 17:22:10 2021 +0000
ivopts: Improve code generated for very simple loops.
caused
FAIL: gcc.dg/tree-ssa/ivopts-8.c scan-tree-dump ivopts "inv_expr [0-9]:
\\t\\(unsigned long\\) sz_[0-9]*\\(D\\) \\* 4 \\+ \\(unsigned long\\)
mem_[0-9]*\\(D\\)"
FAIL: gcc.dg/tree-ssa/ivopts-9.c scan-tree-dump ivopts "inv_expr [0-9]:
\\t\\(unsigned long\\) sz_[0-9]\\(D\\) \\* 4 \\+ \\(unsigned long\\)
mem_[0-9]\\(D\\)"
with GCC configured with
../../gcc/configure
--prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-5546/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="tree-ssa.exp=gcc.dg/tree-ssa/ivopts-8.c
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ivopts-8.c
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ivopts-9.c
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="tree-ssa.exp=gcc.dg/tree-ssa/ivopts-9.c
--target_board='unix{-m32\ -march=cascadelake}'"
(Please do not reply to this email, for question about this report, contact me
at skpgkp2 at gmail dot com)
