+2001-12-19 Jakub Jelinek <jakub@redhat.com>
+
+ * config/ia64/ia64.c (ia64_single_set): Return first set for
+ prologue_allocate_stack and epilogue_deallocate_stack instructions.
+
2001-12-19 Dale Johannesen <dalej@apple.com>
* config/rs6000/rs6000.h: LEGITIMIZE_RELOAD_ADDRESS:
ia64_single_set (insn)
rtx insn;
{
- rtx x = PATTERN (insn);
+ rtx x = PATTERN (insn), ret;
if (GET_CODE (x) == COND_EXEC)
x = COND_EXEC_CODE (x);
if (GET_CODE (x) == SET)
return x;
- return single_set_2 (insn, x);
+ ret = single_set_2 (insn, x);
+ if (ret == NULL && GET_CODE (x) == PARALLEL)
+ {
+ /* Special case here prologue_allocate_stack and
+ epilogue_deallocate_stack. Although it is not a classical
+ single set, the second set is there just to protect it
+ from moving past FP-relative stack accesses. */
+ if (XVECLEN (x, 0) == 2
+ && GET_CODE (XVECEXP (x, 0, 0)) == SET
+ && GET_CODE (XVECEXP (x, 0, 1)) == SET
+ && GET_CODE (SET_DEST (XVECEXP (x, 0, 1))) == REG
+ && SET_DEST (XVECEXP (x, 0, 1)) == SET_SRC (XVECEXP (x, 0, 1))
+ && ia64_safe_itanium_class (insn) == ITANIUM_CLASS_IALU)
+ ret = XVECEXP (x, 0, 0);
+ }
+ return ret;
}
/* Adjust the cost of a scheduling dependency. Return the new cost of
--- /dev/null
+/* This testcase failed on IA-64 at -O2 during scheduling. */
+
+void * baz (unsigned long);
+static inline double **
+bar (long w, long x, long y, long z)
+{
+ long i, a = x - w + 1, b = z - y + 1;
+ double **m = (double **) baz (sizeof (double *) * (a + 1));
+
+ m += 1;
+ m -= w;
+ m[w] = (double *) baz (sizeof (double) * (a * b + 1));
+ m[w] += 1;
+ m[w] -= y;
+ for (i = w + 1; i <= x; i++)
+ m[i] = m[i - 1] + b;
+ return m;
+}
+
+void
+foo (double w[], int x, double y[], double z[])
+{
+ int i;
+ double **a;
+
+ a = bar (1, 50, 1, 50);
+ for (i = 1; i <= x; i++)
+ a[1][i] = - w[x - i] / w[x];
+}