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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103253] [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma or in vect_recog_mask_conversion_pattern) since r12-5129-g8ed62c929c7c4462
Date: Tue, 16 Nov 2021 08:42:17 +0000 [thread overview]
Message-ID: <bug-103253-4-iyXOUFoOV7@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-103253-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103253
Tamar Christina <tnfchris at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Assignee|unassigned at gcc dot gnu.org |tnfchris at gcc dot gnu.org
--- Comment #4 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Strange... I'll take a look.
It looks like the vectorizer has generated correct code even after this change
_54 = .COND_MUL (mask_patt_20.12_45, vect__1.9_38, { 2.0e+0, 2.0e+0, 2.0e+0,
2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0 }, { 1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0,
1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0 });
vect_patt_21.13_48 = _54;
_55 = .COND_MUL (mask_patt_20.12_46, vect__1.9_39, { 2.0e+0, 2.0e+0, 2.0e+0,
2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0 }, { 1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0,
1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0 });
vect_patt_21.13_49 = _55;
iftmp.0_3 = i_10 != 0 ? iftmp.0_8 : 1.0e+0;
# RANGE [1, 17] NONZERO 31
i_9 = i_10 + 1;
ivtmp_2 = ivtmp_4 - 1;
ivtmp_53 = ivtmp_52 + 1;
if (ivtmp_53 < 1)
but DCE6 mangles this to invalid gimple:
.COND_MUL (mask_patt_20.12_45, vect__1.9_38, { 2.0e+0, 2.0e+0, 2.0e+0,
2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0 }, { 1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0,
1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0 });
.COND_MUL (mask_patt_20.12_46, vect__1.9_39, { 2.0e+0, 2.0e+0, 2.0e+0,
2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0, 2.0e+0 }, { 1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0,
1.0e+0, 1.0e+0, 1.0e+0, 1.0e+0 });
ivtmp_53 = ivtmp_52 + 1;
if (ivtmp_53 < 1)
it removes the dead statements but removes the SSA var _55 without removing
it's definition.
next prev parent reply other threads:[~2021-11-16 8:42 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-15 17:05 [Bug tree-optimization/103253] New: [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma) asolokha at gmx dot com
2021-11-15 17:21 ` [Bug tree-optimization/103253] [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma or in vect_recog_mask_conversion_pattern) asolokha at gmx dot com
2021-11-16 8:16 ` [Bug tree-optimization/103253] [12 Regression] ICE: Segmentation fault (in convert_mult_to_fma or in vect_recog_mask_conversion_pattern) since r12-5129-g8ed62c929c7c4462 marxin at gcc dot gnu.org
2021-11-16 8:27 ` asolokha at gmx dot com
2021-11-16 8:42 ` tnfchris at gcc dot gnu.org [this message]
2021-11-16 9:02 ` tnfchris at gcc dot gnu.org
2021-11-16 9:32 ` rguenth at gcc dot gnu.org
2021-11-16 9:39 ` tnfchris at gcc dot gnu.org
2021-11-16 9:44 ` rguenther at suse dot de
2021-11-16 10:12 ` tnfchris at gcc dot gnu.org
2021-11-16 10:29 ` rguenther at suse dot de
2021-11-18 11:24 ` cvs-commit at gcc dot gnu.org
2021-11-18 11:26 ` tnfchris at gcc dot gnu.org
2021-12-13 8:22 ` [Bug tree-optimization/103253] Unused COND_MUL isn't removed by DCE even with -fno-trapping-math tnfchris at gcc dot gnu.org
2022-05-06 8:31 ` jakub at gcc dot gnu.org
2023-05-08 12:23 ` rguenth at gcc dot gnu.org
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