Egcs 1.1.2 bug report

[Nicholas P Lawes]

I have recently upgraded from egcs 1.1 to 1.1.2 on Linux and Solaris
and appear to have run into an internal compiler bug. The code compiled
on all platforms with the previous compiler, but now fails under Solaris
when using the -O2 optimisation flag.

Architecture : SparcStation 20, Solaris 2.6, configured with no options,
then 'make bootstrap'. The fault seems to occur in the if statement with
8 short-circuited strtok'd OR's.

Script started on Wed Mar 24 16:02:20 1999
[1 patina:nick pts/13 /rels/home/nick/bug> gcc -v
Reading specs from
/usr/local/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.66/specs
gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)
[2 patina:nick pts/13 /rels/home/nick/bug> gcc -c -O2 t.c
loop.c:1216: Internal compiler error in function reg_in_basic_block_p
[3 patina:nick pts/13 /rels/home/nick/bug> gcc -O -c t.c
[4 patina:nick pts/13 /rels/home/nick/bug> 
script done on Wed Mar 24 16:03:00 1999

The code:-

#include <stdio.h>
#include <time.h>
#include <string.h>

typedef struct 
{
	char	*data;
} BUF;

BUF		*inputFiles;
char	months[] = "JanFebMarAprMayJunJulAugSepOctNovDec";
time_t	now, readnow;

int
ReadLogLine(char *buf, int maxlen)
{
	static FILE *fp;
	char		line[512];

	while (1)
	{
		if (fp == NULL)
		{
			do
			{
				if (inputFiles == NULL)
					exit(0);

				if ((fp = fopen(inputFiles->data, "r")) == NULL)
					perror(inputFiles->data);

				BufDrop(&inputFiles);
			}
			while (fp == NULL);
		}

		while (1)
		{
			char		*day, *month, *mday, *hh, *mm, *ss, *pid, *cp;
			struct tm	t;
			struct tm	*nowtm;

			if (fgets(line, sizeof(line), fp) == NULL)
			{
				fclose(fp);
				fp = NULL;
				break;			/* next file please */
			}

			buf[0] = '0';
			stripcr(line);

			if ((day	= strtok(line, " :")) == NULL ||
				(month	= strtok(NULL, " :")) == NULL ||
				(mday	= strtok(NULL, " :")) == NULL ||
				(hh		= strtok(NULL, " :")) == NULL ||
				(mm		= strtok(NULL, " :")) == NULL ||
				(ss		= strtok(NULL, " :")) == NULL ||
				(pid	= strtok(NULL, " :")) == NULL ||
				(cp		= strtok(NULL, " :")) == NULL)
				continue;

			nowtm = localtime(&now);
			memcpy(&t, nowtm, sizeof(t));
			readnow = mktime(&t);

			t.tm_hour	= atoi(hh);
			t.tm_min	= atoi(mm);
			t.tm_sec	= atoi(ss);
			t.tm_mday	= atoi(mday);
			t.tm_mon	= (strstr(months, month) - months) / 3;
			readnow		= mktime(&t);
			strncpy(buf + 1, cp, maxlen);
			strcat(buf, "\n");
			return strlen(buf);
		}
	}

	return 0;
}

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-- 
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