x, POINTERS_EXTEND_UNSIGNED);
#endif /* defined(POINTERS_EXTEND_UNSIGNED) */
}
-
-/* Given a memory address or facsimile X, construct a new address,
- currently equivalent, that is stable: future stores won't change it.
-
- X must be composed of constants, register and memory references
- combined with addition, subtraction and multiplication:
- in other words, just what you can get from expand_expr if sum_ok is 1.
-
- Works by making copies of all regs and memory locations used
- by X and combining them the same way X does.
- You could also stabilize the reference to this address
- by copying the address to a register with copy_to_reg;
- but then you wouldn't get indexed addressing in the reference. */
-
-rtx
-copy_all_regs (rtx x)
-{
- if (REG_P (x))
- {
- if (REGNO (x) != FRAME_POINTER_REGNUM
-#if HARD_FRAME_POINTER_REGNUM != FRAME_POINTER_REGNUM
- && REGNO (x) != HARD_FRAME_POINTER_REGNUM
-#endif
- )
- x = copy_to_reg (x);
- }
- else if (MEM_P (x))
- x = copy_to_reg (x);
- else if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS
- || GET_CODE (x) == MULT)
- {
- rtx op0 = copy_all_regs (XEXP (x, 0));
- rtx op1 = copy_all_regs (XEXP (x, 1));
- if (op0 != XEXP (x, 0) || op1 != XEXP (x, 1))
- x = gen_rtx_fmt_ee (GET_CODE (x), Pmode, op0, op1);
- }
- return x;
-}
\f
/* Return something equivalent to X but valid as a memory address
for something of mode MODE. When X is not itself valid, this
return replace_equiv_address (ref, XEXP (ref, 0));
}
\f
-/* Return a modified copy of X with its memory address copied
- into a temporary register to protect it from side effects.
- If X is not a MEM, it is returned unchanged (and not copied).
- Perhaps even if it is a MEM, if there is no need to change it. */
-
-rtx
-stabilize (rtx x)
-{
- if (!MEM_P (x)
- || ! rtx_unstable_p (XEXP (x, 0)))
- return x;
-
- return
- replace_equiv_address (x, force_reg (Pmode, copy_all_regs (XEXP (x, 0))));
-}
-\f
/* Copy the value or contents of X to a new temp reg and return that reg. */
rtx
/* Assemble the static constant template for function entry trampolines. */
extern rtx assemble_trampoline_template (void);
-/* Given rtx, return new rtx whose address won't be affected by
- any side effects. It has been copied to a new temporary reg. */
-extern rtx stabilize (rtx);
-
-/* Given an rtx, copy all regs it refers to into new temps
- and return a modified copy that refers to the new temps. */
-extern rtx copy_all_regs (rtx);
-
/* Copy given rtx to a new temp reg and return that. */
extern rtx copy_to_reg (rtx);