Thread View: net.lang.c++
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Started by kenny
Tue, 21 Oct 1986 18:47
``this'' other than register?
Author: kenny
Date: Tue, 21 Oct 1986 18:47
Date: Tue, 21 Oct 1986 18:47
25 lines
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1757 bytes
The C++ compiler in use here (1.0; we have 1.1 on order but it
has yet to arrive) always declares ``this'' as a register argument. As
Bjarne points out, if a function has little use for ``this'' (I have
one that picks up an instance variable, goes through a complex loop
that uses only local variables, and finally plugs the instance variable
back) making ``this'' a register is a loss, particularly on Vax.
In addition, it turns out that (again on Vax) the loop in
question works out to be *much* faster if I can use a sixth register
variable (the working set just happens to be six registers).
+ Do any of the newer compilers allow ``this'' to be other than
register?
+ Does anyone have something clever to interpose between cfront
and cc that gets rid of the register declaration? That gets
rid of it for one entry function? Yes, I'm hacker enough to
build my own, but why re-invent the wheel?
Kevin Kenny UUCP: {ihnp4,pur-ee,convex}!uiucdcs!kenny
Department of Computer Science ARPA: kenny@B.CS.UIUC.EDU (kenny@UIUC.ARPA)
University of Illinois CSNET: kenny@UIUC.CSNET
1304 W. Springfield Ave.
Urbana, Illinois, 61801 Voice: (217) 333-7980
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