[Gfortran, patch] Fix simplify char and ichar intrinsic

[Feng Wang]

:ADDPATCH fortran:

When changing my patch for PR12456, I found another bug in ichar intrinsic.

On compile-time, we use signed char to hold characters. When we get the index
of a character in gfc_simplify_ichar, first we should convert to unsigned char
type.

Before applying the patch, we get
ichar (char (255)) = -1

Fortran ChangeLog entry:
2006-01-06  Feng Wang  <fengwang@nudt.edu.cn>

	* simplify.c (gfc_simplify_char): Use UCHAR_MAX instead of literal
	constant.
	(gfc_simplify_ichar): Get the result from unsinged char and in the
	range 0 to UCHAR_MAX instead of CHAR_MIN to CHAR_MAX.
Testsuite ChangeLog entry:
2006-01-06  Feng Wang  <fengwang@nudt.edu.cn>

	* gfortran.dg/intrinsic_i_char.f90: New test.


Best Regards,
Feng Wang

--
Creative Compiler Research Group,
National University of Defense Technology, China.


	

	
		
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