===================================================================
@@ -1429,14 +1429,16 @@ expand_set_cint64_one_inst (rtx dest_reg
}
else if (!three_wide_only)
{
- rtx imm_op = GEN_INT (val);
-
- if (satisfies_constraint_J (imm_op)
- || satisfies_constraint_K (imm_op)
- || satisfies_constraint_N (imm_op)
- || satisfies_constraint_P (imm_op))
+ /* Test for the following constraints: J, K, N, P. We avoid
+ generating an rtx and using existing predicates because we
+ can be testing and rejecting a lot of constants, and GEN_INT
+ is O(N). */
+ if ((val >= -32768 && val <= 65535)
+ || ((val == (val & 0xFF) * 0x0101010101010101LL))
+ || (val == ((trunc_int_for_mode (val, QImode) & 0xFFFF)
+ * 0x0001000100010001LL)))
{
- emit_move_insn (dest_reg, imm_op);
+ emit_move_insn (dest_reg, GEN_INT (val));
return true;
}
}
This patch inlines some tests while searching for the best way to synthesize a constant, to avoid the need to generate an rtx. This became expensive for code that generates a lot of constants. Backported to 4.7 and 4.8. * config/tilegx/tilegx.c (expand_set_cint64_one_inst): Inline tests for constraint J, K, N, P.