-0LL generates overflow message (GCC 2.3.1)

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Article #1343

#1343

From: Paul Eggert
Date: Tue, 10 Nov 1992 19:30

38 lines
1302 bytes

For the program

	long long x = -0LL;

GCC 2.3.1 (sparc, SunOS 4.1.2) wrongly reports:

	t.c:1: warning: overflow in constant expression

Here is a patch.


Tue Nov 10 19:12:13 1992  Paul Eggert  (eggert@twinsun.com)

	* fold-const.c (neg_double): Don't report overflow with -0.

===================================================================
RCS file: fold-const.c,v
retrieving revision 2.3.1.6
diff -c -c -r2.3.1.6 fold-const.c
*** fold-const.c	1992/11/05 01:53:38	2.3.1.6
--- fold-const.c	1992/11/10 19:12:13
***************
*** 224,230 ****
      {
        *lv = 0;
        *hv = - h1;
!       return same_sign (h1, *hv);
      }
    else
      {
--- 224,230 ----
      {
        *lv = 0;
        *hv = - h1;
!       return (*hv & h1) < 0;
      }
    else
      {

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From: eggert@twinsun.COM (Paul Eggert)
Subject: -0LL generates overflow message (GCC 2.3.1)
Message-ID: <9211101930.AA17739@farside.twinsun.com>
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Distribution: gnu
Date: Tue, 10 Nov 1992 19:30:40 GMT
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