[Bug middle-end/26001] [4.1/4.2 Regression] LAPACK testsuite failure with optimization

[pinskia at gcc dot gnu dot org]

------- Comment #10 from pinskia at gcc dot gnu dot org  2006-01-30 19:13 -------
(In reply to comment #8)
> Did the regression also happen on 4.1?  We should probably revert Feng Wang's
> patch there.

But there is a latent bug.  I don't know a way to reproduce this without Feng's
patch in C or C++, maybe Ada.  But the bug is still there.

Here is the reduced testcase that passes at -O0 but fails at -O1.
CHARACTER*10       INTSTR
CHARACTER          C1
DATA               INTSTR / '0123456789' /

C1 = INTSTR(1:1)
print *, C1
if(C1 .ne. '0')  call abort()

end


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26001