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Message-ID: <3E761DCA.9080005@colorfullife.com>
Date: Mon, 17 Mar 2003 20:11:06 +0100
From: Manfred Spraul <manfred@colorfullife.com>
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To: Jakub Jelinek <jakub@redhat.com>
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Why is get_current() not const function?
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Is it possible to use __attribute__((const) with inline functions?
I tried that, but it seems that gcc ignores __attribute__((const) and 
looks at the contents of the function instead.

I've tried the attached test app: With gcc-3.2.1 (gcc -O3), and 
"inlconst" was called 10 times, constfnc only once.

--
    Manfred

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#include <stdio.h>
#include <stdlib.h>

static int constfnc(int x) __attribute__((const));

static inline int inlconst(int x) __attribute__((const));

static void dummy(int i);

static inline int inlconst(int x)
{
	printf("in inlconst.\n");
	return 2;
}

int main(void)
{
	int i;
	for(i=0;i<10;i++) {
		dummy(constfnc(0));
	}
	for (i=0;i<10;i++) {
		dummy(inlconst(0));
	}
}

int constfnc(int x)
{
	printf("in const.\n");
	return 1;
}


void dummy(int i)
{
}


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