http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55022
Bug #: 55022
Summary: [4.8 Regression] air.f90 is miscompliled with -m64 -O2
-fgraphite-identity after revision 190619
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected], [email protected]
The test air.f90 is miscompliled with -m64 -O2 -fgraphite-identity after
revision 190619 (r188694 is OK):
...
ITERATION# TIME FINAL MASS RESIDUAL
9 0.000045757110 0.01000000 0.597638
17 0.000091473627 0.01000000 0.448609
25 0.000137176442 0.01000000 0.608353
33 0.000182824593 0.01000000 0.619686
41 0.000228306169 0.01000000 0.628800
49 0.000273480245 0.01000000 0.813862
58 0.000323343055 0.01000000 1.026950
67 0.000371631805 0.01000000 1.238993
77 0.000422628642 0.01000000 1.474307
88 0.000474256730 0.01000000 1.679987
100 0.000524089193 0.01000000 1.789565
114 0.000575138355 0.01000000 1.834548
129 0.000625547555 0.01000000 1.945421
144 0.000674419139 0.01000000 2.198194
166 0.000728576510 0.01000000 NaN
168 100.000735868323 0.01000000 NaN
deltat, final t, iterations
100.00000000000000 100.00073586832266 168
9 0.59763770273003503
17 0.44860912267491976
25 0.60835306073381645
33 0.61968645389575716
41 0.62879989012582926
49 0.81386186515901682
58 1.0269501832675307
67 1.2389929088800784
77 1.4743070523641029
88 1.6799869908106582
100 1.7895645561305713
114 1.8345478482485826
129 1.9454206794378737
144 2.1981944269573130
166 NaN
168 NaN
The miscompiled subroutines are botwall and topwall.
