http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55633
--- Comment #3 from dave.anglin at bell dot net 2012-12-10 13:31:31 UTC ---
On 10-Dec-12, at 3:57 AM, burnus at gcc dot gnu.org wrote:
> Can you pin-point which version causes the regression?
At this point, I onnly know the test didn't fail in early September.
>
> BIT_SIZE(m) is (correctly) 64 while "ma" is (wrongly) "0". And "NOT
> returns the
> bitwise Boolean inverse of I."
>
> Can you run the following code? It matches the failing code but
> contains some
> debugging printout.
>
> Can you also try "kind=4"? That seems to work while "kind=8" seems
> to fail.
>
> integer(kind=8) m, ma
> ma = 0
> m = 0
> print '("m =",i21,z17," ma=",i2,z13)', m, m, ma, ma
> m = not(m)
> print '("m =",i21,z17," ma=",i2,z13)', m, m, ma, ma
> do while ( (m.ne.0) .and. (ma.lt.127) )
> ma = ma + 1
> m = ishft(m,-1)
> print '("m =",i21,z17,", ma=",i2,z13)', m, m, ma, ma
> end do
> print *, BIT_SIZE(m), ma
> if (BIT_SIZE(m) /= ma) error stop
> end
Here are the results from hppa-unknown-linux-gnu which also fails.
kind=8:
m = 0 0 ma= 0 0
m = -1 FFFFFFFFFFFFFFFF ma= 0 0
m = 9223372036854775807 7FFFFFFFFFFFFFFF, ma= 1 1
m = 4611686018427387903 3FFFFFFFFFFFFFFF, ma= 2 2
m = 2305843009213693951 1FFFFFFFFFFFFFFF, ma= 3 3
m = 1152921504606846975 FFFFFFFFFFFFFFF, ma= 4 4
m = 576460752303423487 7FFFFFFFFFFFFFF, ma= 5 5
m = 288230376151711743 3FFFFFFFFFFFFFF, ma= 6 6
m = 144115188075855871 1FFFFFFFFFFFFFF, ma= 7 7
m = 72057594037927935 FFFFFFFFFFFFFF, ma= 8 8
m = 36028797018963967 7FFFFFFFFFFFFF, ma= 9 9
m = 18014398509481983 3FFFFFFFFFFFFF, ma=10 A
m = 9007199254740991 1FFFFFFFFFFFFF, ma=11 B
m = 4503599627370495 FFFFFFFFFFFFF, ma=12 C
m = 2251799813685247 7FFFFFFFFFFFF, ma=13 D
m = 1125899906842623 3FFFFFFFFFFFF, ma=14 E
m = 562949953421311 1FFFFFFFFFFFF, ma=15 F
m = 281474976710655 FFFFFFFFFFFF, ma=16 10
m = 140737488355327 7FFFFFFFFFFF, ma=17 11
m = 70368744177663 3FFFFFFFFFFF, ma=18 12
m = 35184372088831 1FFFFFFFFFFF, ma=19 13
m = 17592186044415 FFFFFFFFFFF, ma=20 14
m = 8796093022207 7FFFFFFFFFF, ma=21 15
m = 4398046511103 3FFFFFFFFFF, ma=22 16
m = 2199023255551 1FFFFFFFFFF, ma=23 17
m = 1099511627775 FFFFFFFFFF, ma=24 18
m = 549755813887 7FFFFFFFFF, ma=25 19
m = 274877906943 3FFFFFFFFF, ma=26 1A
m = 137438953471 1FFFFFFFFF, ma=27 1B
m = 68719476735 FFFFFFFFF, ma=28 1C
m = 34359738367 7FFFFFFFF, ma=29 1D
m = 17179869183 3FFFFFFFF, ma=30 1E
m = 8589934591 1FFFFFFFF, ma=31 1F
m = 4294967295 FFFFFFFF, ma=32 20
m = 2147483647 7FFFFFFF, ma=33 21
m = 1073741823 3FFFFFFF, ma=34 22
m = 536870911 1FFFFFFF, ma=35 23
m = 268435455 FFFFFFF, ma=36 24
m = 134217727 7FFFFFF, ma=37 25
m = 67108863 3FFFFFF, ma=38 26
m = 33554431 1FFFFFF, ma=39 27
m = 16777215 FFFFFF, ma=40 28
m = 8388607 7FFFFF, ma=41 29
m = 4194303 3FFFFF, ma=42 2A
m = 2097151 1FFFFF, ma=43 2B
m = 1048575 FFFFF, ma=44 2C
m = 524287 7FFFF, ma=45 2D
m = 262143 3FFFF, ma=46 2E
m = 131071 1FFFF, ma=47 2F
m = 65535 FFFF, ma=48 30
m = 32767 7FFF, ma=49 31
m = 16383 3FFF, ma=50 32
m = 8191 1FFF, ma=51 33
m = 4095 FFF, ma=52 34
m = 2047 7FF, ma=53 35
m = 1023 3FF, ma=54 36
m = 511 1FF, ma=55 37
m = 255 FF, ma=56 38
m = 127 7F, ma=57 39
m = 63 3F, ma=58 3A
m = 31 1F, ma=59 3B
m = 15 F, ma=60 3C
m = 7 7, ma=61 3D
m = 3 3, ma=62 3E
m = 1 1, ma=63 3F
m = 0 0, ma=64 40
64 64
kind=4:
m = 0 0 ma= 0 0
m = -1 FFFFFFFF ma= 0 0
m = 2147483647 7FFFFFFF, ma= 1 1
m = 1073741823 3FFFFFFF, ma= 2 2
m = 536870911 1FFFFFFF, ma= 3 3
m = 268435455 FFFFFFF, ma= 4 4
m = 134217727 7FFFFFF, ma= 5 5
m = 67108863 3FFFFFF, ma= 6 6
m = 33554431 1FFFFFF, ma= 7 7
m = 16777215 FFFFFF, ma= 8 8
m = 8388607 7FFFFF, ma= 9 9
m = 4194303 3FFFFF, ma=10 A
m = 2097151 1FFFFF, ma=11 B
m = 1048575 FFFFF, ma=12 C
m = 524287 7FFFF, ma=13 D
m = 262143 3FFFF, ma=14 E
m = 131071 1FFFF, ma=15 F
m = 65535 FFFF, ma=16 10
m = 32767 7FFF, ma=17 11
m = 16383 3FFF, ma=18 12
m = 8191 1FFF, ma=19 13
m = 4095 FFF, ma=20 14
m = 2047 7FF, ma=21 15
m = 1023 3FF, ma=22 16
m = 511 1FF, ma=23 17
m = 255 FF, ma=24 18
m = 127 7F, ma=25 19
m = 63 3F, ma=26 1A
m = 31 1F, ma=27 1B
m = 15 F, ma=28 1C
m = 7 7, ma=29 1D
m = 3 3, ma=30 1E
m = 1 1, ma=31 1F
m = 0 0, ma=32 20
32 32
--
John David Anglin dave.ang...@bell.net
