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New test, for spurious "variable may be clobbered by longjmp' or vfork'"

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warnings.

From-SVN: r25765
This commit is contained in:
Zack Weinberg 1999-03-14 09:18:03 +00:00
parent 407f03b8d7
commit c2b2e00004
1 changed files with 36 additions and 0 deletions
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36
gcc/testsuite/gcc.dg/setjmp-1.c Normal file
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/* Test for bogus "variable `x' may be clobbered by longjmp" warnings.
Inspired by cse.c:simplify_relational_operation. */
/* { dg-do compile } */
/* { dg-options "-O -W -Wall" } */
#include <setjmp.h>
extern void set_float_handler (jmp_buf *);
#define EQ 0x01
#define LT 0x02
#define GT 0x04
int
compare_float (double a, double b) /* { dg-bogus "clobbered" "spurious clobbered warning" { xfail *-*-* } } */
{
jmp_buf handler;
int result;
a += 1.0;
if (setjmp (handler))
{
set_float_handler (0);
return 0;
}
set_float_handler (&handler);
if (a == b) result = EQ;
else if (a > b) result = LT;
else if (a < b) result = GT;
else result = 0;
set_float_handler (0);
return result;
}