Subject: Compiler generates inefficient code for u_char comparisons
Index:	lib/ccom/optable 2.11BSD

Description:
	For the C code:

	unsigned char b;
	if (b > 1)
		...

	The compiler was generating:

	clr r0
	bisb _b,r0
	cmp $1,r0
	jhis L3
	...
L3:

	instead of:

	cmpb $1,_b
	jhis L3
	...
L3:

Repeat-By:
	Examine the generated code.  This problem was noticed when
	changing f_count from 'char' to 'u_char' in /sys/h/file.h

Fix:
	The fix is to include the unsigned char case in the cctab
	part of the C compiler.

	Apply the patch then remake and install 'c1' (the other phases
	of the compiler are unaffected).
-----------------------------------------------------------------------
*** /usr/src/lib/ccom/optable.old	Fri Oct 11 08:26:52 1991
--- /usr/src/lib/ccom/optable	Wed Oct 23 09:50:52 1991
***************
*** 1677,1682 ****
--- 1677,1683 ----
  
  %aw,aw
  %ab,ab
+ %aub,a
  %aub,aub
  %	[move3]
  
