[Bug fortran/47359] Recursive functions of intrinsic names generates invalid assembler

["dominiq at lps dot ens.fr" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47359

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2011-01-19 20:44:27 UTC ---
> I know this is sort of a contrived case but seems that gfortran is getting
> confused in this case leading to syntactically invalid assembler.

I don't see the invalid assembler on x86_64-apple-darwin10 and
powerpc-apple-darwin9 for trunk (4.6), 4.50, and 4.4.4. However gfortran is
indeed confused by the code as shown by the following modification:

RECURSIVE FUNCTION MAX(A, B, i) RESULT(K)
  real i
  i = i + 1
  IF (B >= 0) THEN
         K = MAX(A+1, B-1, i)
  ELSE
     K = A
  END IF
END
RECURSIVE FUNCTION myMAX(A, B, i) RESULT(K)
  real i
  i = i + 1
  IF (B >= 0) THEN
         K = myMAX(A+1, B-1, i)
  ELSE
     K = A
  END IF
END
external max
a = 0
b = 0
i = max(3.2,0.2, a)
j = mymax(3.2,0.2, b)
print *, i, j, a, b
a = 0
b = 0
i = max(3.2,2.2, a)
j = mymax(3.2,2.2, b)
print *, i, j, a, b
end
[macbook] f90/bug% gfc pr47359_db_3.f90
[macbook] f90/bug% a.out
           4           4   1.0000000       2.0000000    
           4           6   1.0000000       4.0000000    

where I had to declare 'i' REAL in order to avoid a compilation error and
clearly the external MAX is called, but only once apparently because the call
to MAX in MAX is a call to the intrinsic. g95 gives

 4 4 2. 2.
 6 6 4. 4.