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* [Bug rtl-optimization/64311] New: 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
@ 2014-12-15 8:46 ubizjak at gmail dot com
2014-12-15 8:50 ` [Bug rtl-optimization/64311] " ubizjak at gmail dot com
2015-01-24 17:11 ` dominiq at lps dot ens.fr
0 siblings, 2 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2014-12-15 8:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64311
Bug ID: 64311
Summary: 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
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
As seen in [1], reproducible on x86_64-linux with "-mavx512bw -mavx512vl -O2
-fpic -m32 -march=corei7":
~/gcc-build/gcc/xgcc -B ~/gcc-build/gcc/ -mavx512bw -mavx512vl -O2 -fpic -m32
-march=corei7 -S avx512bw-vpbroadcastw-1.c
avx512bw-vpbroadcastw-1.c: In function ‘avx512bw_test’:
avx512bw-vpbroadcastw-1.c:39:1: internal compiler error: Max. number of
generated reload insns per insn is achieved (90)
}
^
0x9383d0 lra_constraints(bool)
../../gcc-svn/trunk/gcc/lra-constraints.c:4225
0x928301 lra(_IO_FILE*)
../../gcc-svn/trunk/gcc/lra.c:2277
0x8e6959 do_reload
../../gcc-svn/trunk/gcc/ira.c:5391
0x8e6959 execute
../../gcc-svn/trunk/gcc/ira.c:5561
Please submit a full bug report,
[1] https://gcc.gnu.org/ml/gcc-testresults/2014-12/msg01763.html
>From gcc-bugs-return-470679-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Dec 15 08:46:51 2014
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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/64309] if (1 & (1 << n)) not simplified to if (n == 0)
Date: Mon, 15 Dec 2014 08:46:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd309
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-12-15
Component|rtl-optimization |middle-end
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. Sth like
(simplify
(ne (bit_and (lshift integer_onep @0) integer_onep) integer_zerop)
(eq @0 { build_zero_cst (TREE_TYPE (@0)); })
with eventually also covering if ((1 & (1<< n)) == 0) -> if (n & 1 == 0)
You can extend this to cover the other cases you mention.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [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
2014-12-15 8:46 [Bug rtl-optimization/64311] New: 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
@ 2014-12-15 8:50 ` ubizjak at gmail dot com
2015-01-24 17:11 ` dominiq at lps dot ens.fr
1 sibling, 0 replies; 3+ messages in thread
From: ubizjak at gmail dot com @ 2014-12-15 8:50 UTC (permalink / raw)
To: gcc-bugs
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>
To: gcc-bugs@gcc.gnu.org
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).
^ permalink raw reply [flat|nested] 3+ messages in thread
* [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
2014-12-15 8:46 [Bug rtl-optimization/64311] New: 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
2014-12-15 8:50 ` [Bug rtl-optimization/64311] " ubizjak at gmail dot com
@ 2015-01-24 17:11 ` dominiq at lps dot ens.fr
1 sibling, 0 replies; 3+ messages in thread
From: dominiq at lps dot ens.fr @ 2015-01-24 17:11 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64311
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Still present at r220081.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-12-15 8:46 [Bug rtl-optimization/64311] New: 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
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