[Bug rtl-optimization/64311] ICE: Max. number of generated reload insns per insn is achieved (90) with -fpic -march=corei7 for gcc.target/i386/avx512bw-vpbroadcast[bw]-1.c

["ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64311

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |evstupac at gmail dot com,
                   |                            |kyukhin at gcc dot gnu.org,
                   |                            |tocarip at gcc dot gnu.org

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
Add some CCs.
>From gcc-bugs-return-470681-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 15 08:55:52 2014
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/64308] Missed optimization: 64-bit divide used when 32-bit divide would work
Date: Mon, 15 Dec 2014 08:55:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd308

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Not sure if your analysis is correct, but value-range propagation computes

ret_4: VARYING
...
_12: [0, 4294967295]
_13: [0, 4294967295]
_14: [0, 18446744065119617025]
_15: [0, 4294967295]
_16: [0, +INF]

for

Folding statement: _12 = (long long unsigned int) ret_4;
Not folded
Folding statement: _13 = (long long unsigned int) b_1;
Not folded
Folding statement: _14 = _12 * _13;
Not folded
Folding statement: _15 = (long long unsigned int) m_6(D);
Not folded
Folding statement: _16 = _14 % _15;

so its analysis needs to be improved (didn't investigate exactly where it
fails, but IIRC modulo is not handled here because m may be zero).