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rtlanal.c (may_trap_p): Check operand modes of COMPARE.

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* rtlanal.c (may_trap_p): Check operand modes of COMPARE.
	* gcc.dg/20001013-1.c: New test.

From-SVN: r36878
This commit is contained in:
Jakub Jelinek 2000-10-16 09:46:09 +02:00 committed by Jakub Jelinek
parent 392e6b81c3
commit 5514386120
4 changed files with 58 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2000-10-16 Jakub Jelinek <jakub@redhat.com>
* rtlanal.c (may_trap_p): Check operand modes of COMPARE.
2000-10-14 Joseph S. Myers <jsm28@cam.ac.uk>
* PROBLEMS: Remove.

11
gcc/rtlanal.c
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@ -1930,6 +1930,17 @@ may_trap_p (x)
certainly may trap. */
return 1;
case COMPARE:
/* Any floating comparison may trap. */
if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
return 1;
/* But often the compare has some CC mode, so check operand
modes as well. */
if (GET_MODE_CLASS (GET_MODE (XEXP (x, 0))) == MODE_FLOAT
|| GET_MODE_CLASS (GET_MODE (XEXP (x, 1))) == MODE_FLOAT)
return 1;
break;
default:
/* Any floating arithmetic may trap. */
if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2000-10-16 Jakub Jelinek <jakub@redhat.com>
* gcc.dg/20001013-1.c: New test.
2000-10-15 Joseph S. Myers <jsm28@cam.ac.uk>
* gcc.dg/c90-printf-2.c, gcc.dg/c90-scanf-2.c: Determine the type

39
gcc/testsuite/gcc.dg/20001013-1.c Normal file
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@ -0,0 +1,39 @@
/* { dg-do run { target sparc*-*-* } } */
/* { dg-options "-O2 -mvis" } */
int l;
int baz (double x)
{
return l == 0;
}
double bar (double x)
{
return 1.0;
}
double foo (double x)
{
if (l == -1 || baz (x)) return x;
if (x < 0.0)
return bar (x);
else
return 0.0;
}
union {
double d;
long long l;
} x = { l: 0x7ff8000000000000LL }, y;
main ()
{
unsigned int fsr = 0;
__asm __volatile ("ld %0, %%fsr" : : "m" (fsr));
y.d = foo (x.d);
__asm __volatile ("st %%fsr, %0" : "=m" (fsr));
if (x.l != y.l || (fsr & 0x3ff))
abort ();
exit (0);
}