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[Bug tree-optimization/33299] miscompilation with gfortran -O2 -ffast-math -ftree-vectorize
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 Sep 2007 09:55:14 -0000
- Subject: [Bug tree-optimization/33299] miscompilation with gfortran -O2 -ffast-math -ftree-vectorize
- References: <bug-33299-11807@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from rguenth at gcc dot gnu dot org 2007-09-04 09:55 -------
Confirmed. It looks like the vectorizer forgets to update the PHI node for
stmp_var:
<bb 5>:
# vect_var_.32_31 = PHI <vect_var_.32_29(3)>
# s_4 = PHI <s_2(3)>
# s_10 = PHI <s_2(3)>
stmp_var_.34_32 = BIT_FIELD_REF <vect_var_.32_31, 64, 0>;
stmp_var_.34_33 = BIT_FIELD_REF <vect_var_.32_31, 64, 64>;
stmp_var_.34_34 = MIN_EXPR <stmp_var_.34_33, stmp_var_.34_32>;
D.1396_15 = *x_14(D);
if (D.1396_15 < 0.0)
goto <bb 6>;
else
goto <bb 7>;
<bb 6>:
s_16 = -stmp_var_.34_34;
<bb 7>:
# s_1 = PHI <s_4(5), s_16(6)>
return s_1;
s_4 should be stmp_var_.34_34 instead.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dorit at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2007-09-04 09:55:14
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33299