non-linear gcc-2.1 compile time?

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Article #52705

#52705

From: Arthur David Olson
Date: Mon, 25 May 1992 00:50

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Should I be worried by the attached non-linear (in terms of compile time)
behavior of gcc-2.1 on a Sun 3?  (The same sort of things happens on a
SPARCstation 2--data not shown.)
-- 
		Arthur David Olson	ado@elsie.nci.nih.gov
		ADO and Elsie are Ampex and Borden trademarks

	Script started on Sun May 24 20:41:19 1992
	elsie$ cat 16.c
	#define s	if (a()) return b()
	#define T(x)	x; x

	main()
	{
		T(T(T(T(s))));
	}
	elsie$ time /usr/local/bin/gcc -S -O2 16.c
		9.3 real         7.8 user         0.5 sys  
	elsie$ diff 16.c 32.c
	6c6
	< 	T(T(T(T(s))));
	---
	> 	T(T(T(T(T(s)))));
	elsie$ time /usr/local/bin/gcc -S -O2 32.c
	       37.6 real        36.9 user         0.5 sys  
	elsie$ diff 32.c 64.c
	6c6
	< 	T(T(T(T(T(s)))));
	---
	> 	T(T(T(T(T(T(s))))));
	elsie$ time /usr/local/bin/gcc -S -O2 64.c
	       97.1 real        96.3 user         0.5 sys  
	elsie$ exit

	script done on Sun May 24 20:45:01 1992

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Message-ID: <1992May25.005022.17767@alw.nih.gov>

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From: ado@elsie.nci.nih.gov (Arthur David Olson)
Subject: non-linear gcc-2.1 compile time?
Message-ID: <1992May25.005022.17767@alw.nih.gov>
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Date: Mon, 25 May 1992 00:50:22 GMT
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