}
}
-/* Legitimize a pic address reference in ORIG.
- The return value is the legitimated address.
- If OLDX is non-zero, it is the target to assign the address to first. */
+/* Return true if SYMBOL_REF X binds locally. */
-static rtx
-arc_legitimize_pic_address (rtx orig, rtx oldx)
+static bool
+arc_symbol_binds_local_p (const_rtx x)
{
- rtx addr = orig;
- rtx pat = orig;
- rtx base;
+ return (SYMBOL_REF_DECL (x)
+ ? targetm.binds_local_p (SYMBOL_REF_DECL (x))
+ : SYMBOL_REF_LOCAL_P (x));
+}
- if (oldx == orig)
- oldx = NULL;
+/* Legitimize a pic address reference in ADDR. The return value is
+ the legitimated address. */
- if (GET_CODE (addr) == LABEL_REF)
- ; /* Do nothing. */
- else if (GET_CODE (addr) == SYMBOL_REF)
+static rtx
+arc_legitimize_pic_address (rtx addr)
+{
+ if (!flag_pic)
+ return addr;
+
+ switch (GET_CODE (addr))
{
- enum tls_model model = SYMBOL_REF_TLS_MODEL (addr);
- if (model != 0)
- return arc_legitimize_tls_address (addr, model);
- else if (!flag_pic)
- return orig;
- else if (CONSTANT_POOL_ADDRESS_P (addr) || SYMBOL_REF_LOCAL_P (addr))
- return arc_unspec_offset (addr, ARC_UNSPEC_GOTOFFPC);
+ case SYMBOL_REF:
+ /* TLS symbols are handled in different place. */
+ if (SYMBOL_REF_TLS_MODEL (addr))
+ return addr;
/* This symbol must be referenced via a load from the Global
Offset Table (@GOTPC). */
- pat = arc_unspec_offset (addr, ARC_UNSPEC_GOT);
- pat = gen_const_mem (Pmode, pat);
-
- if (oldx == NULL)
- oldx = gen_reg_rtx (Pmode);
-
- emit_move_insn (oldx, pat);
- pat = oldx;
- }
- else
- {
- if (GET_CODE (addr) == CONST)
- {
- addr = XEXP (addr, 0);
- if (GET_CODE (addr) == UNSPEC)
- {
- /* Check that the unspec is one of the ones we generate? */
- return orig;
- }
- /* fwprop is placing in the REG_EQUIV notes constant pic
- unspecs expressions. Then, loop may use these notes for
- optimizations resulting in complex patterns that are not
- supported by the current implementation. The following
- two if-cases are simplifying the complex patters to
- simpler ones. */
- else if (GET_CODE (addr) == MINUS)
- {
- rtx op0 = XEXP (addr, 0);
- rtx op1 = XEXP (addr, 1);
- gcc_assert (oldx);
- gcc_assert (GET_CODE (op1) == UNSPEC);
-
- emit_move_insn (oldx,
- gen_rtx_CONST (SImode,
- arc_legitimize_pic_address (op1,
- NULL_RTX)));
- emit_insn (gen_rtx_SET (oldx, gen_rtx_MINUS (SImode, op0, oldx)));
- return oldx;
-
- }
- else if (GET_CODE (addr) != PLUS)
- {
- rtx tmp = XEXP (addr, 0);
- enum rtx_code code = GET_CODE (addr);
-
- /* It only works for UNARY operations. */
- gcc_assert (UNARY_P (addr));
- gcc_assert (GET_CODE (tmp) == UNSPEC);
- gcc_assert (oldx);
-
- emit_move_insn
- (oldx,
- gen_rtx_CONST (SImode,
- arc_legitimize_pic_address (tmp,
- NULL_RTX)));
-
- emit_insn (gen_rtx_SET (oldx,
- gen_rtx_fmt_ee (code, SImode,
- oldx, const0_rtx)));
-
- return oldx;
- }
- else
- {
- gcc_assert (GET_CODE (addr) == PLUS);
- if (GET_CODE (XEXP (addr, 0)) == UNSPEC)
- return orig;
- }
- }
-
- if (GET_CODE (addr) == PLUS)
- {
- rtx op0 = XEXP (addr, 0), op1 = XEXP (addr, 1);
+ if (!arc_symbol_binds_local_p (addr))
+ return gen_const_mem (Pmode, arc_unspec_offset (addr, ARC_UNSPEC_GOT));
- base = arc_legitimize_pic_address (op0, oldx);
- pat = arc_legitimize_pic_address (op1,
- base == oldx ? NULL_RTX : oldx);
-
- if (base == op0 && pat == op1)
- return orig;
+ /* Local symb: use @pcl to access it. */
+ /* Fall through. */
+ case LABEL_REF:
+ return arc_unspec_offset (addr, ARC_UNSPEC_GOTOFFPC);
- if (GET_CODE (pat) == CONST_INT)
- pat = plus_constant (Pmode, base, INTVAL (pat));
- else
- {
- if (GET_CODE (pat) == PLUS && CONSTANT_P (XEXP (pat, 1)))
- {
- base = gen_rtx_PLUS (Pmode, base, XEXP (pat, 0));
- pat = XEXP (pat, 1);
- }
- pat = gen_rtx_PLUS (Pmode, base, pat);
- }
- }
+ default:
+ break;
}
- return pat;
+ return addr;
}
/* Output address constant X to FILE, taking PIC into account. */
}
}
-#define SYMBOLIC_CONST(X) \
-(GET_CODE (X) == SYMBOL_REF \
- || GET_CODE (X) == LABEL_REF \
- || (GET_CODE (X) == CONST && symbolic_reference_mentioned_p (X)))
-
-/* Emit insns to move operands[1] into operands[0]. */
-
-static void
-prepare_pic_move (rtx *operands, machine_mode)
-{
- if (GET_CODE (operands[0]) == MEM && SYMBOLIC_CONST (operands[1])
- && flag_pic)
- operands[1] = force_reg (Pmode, operands[1]);
- else
- {
- rtx temp = (reload_in_progress ? operands[0]
- : flag_pic? gen_reg_rtx (Pmode) : NULL_RTX);
- operands[1] = arc_legitimize_pic_address (operands[1], temp);
- }
-}
-
-
/* The function returning the number of words, at the beginning of an
argument, must be put in registers. The returned value must be
zero for arguments that are passed entirely in registers or that
}
}
- if (mode == SImode && SYMBOLIC_CONST (operands[1]))
+ if (GET_CODE (operands[1]) == SYMBOL_REF)
{
- prepare_pic_move (operands, SImode);
-
- /* Disable any REG_EQUALs associated with the symref
- otherwise the optimization pass undoes the work done
- here and references the variable directly. */
+ enum tls_model model = SYMBOL_REF_TLS_MODEL (operands[1]);
+ if (MEM_P (operands[0]) && flag_pic)
+ operands[1] = force_reg (mode, operands[1]);
+ else if (model)
+ operands[1] = arc_legitimize_tls_address (operands[1], model);
}
+ operands[1] = arc_legitimize_pic_address (operands[1]);
+
+ /* Store instructions are limited, they only accept as address an
+ immediate, a register or a register plus a small immediate. */
if (MEM_P (operands[0])
- && !(reload_in_progress || reload_completed))
+ && !move_dest_operand (operands[0], mode))
{
- operands[1] = force_reg (mode, operands[1]);
- if (!move_dest_operand (operands[0], mode))
- {
- rtx addr = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
- /* This is like change_address_1 (operands[0], mode, 0, 1) ,
- except that we can't use that function because it is static. */
- rtx pat = change_address (operands[0], mode, addr);
- MEM_COPY_ATTRIBUTES (pat, operands[0]);
- operands[0] = pat;
- }
- if (!cse_not_expected)
- {
- rtx pat = XEXP (operands[0], 0);
-
- pat = arc_legitimize_address_0 (pat, pat, mode);
- if (pat)
- {
- pat = change_address (operands[0], mode, pat);
- MEM_COPY_ATTRIBUTES (pat, operands[0]);
- operands[0] = pat;
- }
- }
+ rtx tmp0 = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
+ rtx tmp1 = change_address (operands[0], mode, tmp0);
+ MEM_COPY_ATTRIBUTES (tmp1, operands[0]);
+ operands[0] = tmp1;
}
- if (MEM_P (operands[1]) && !cse_not_expected)
- {
- rtx pat = XEXP (operands[1], 0);
-
- pat = arc_legitimize_address_0 (pat, pat, mode);
- if (pat)
- {
- pat = change_address (operands[1], mode, pat);
- MEM_COPY_ATTRIBUTES (pat, operands[1]);
- operands[1] = pat;
- }
- }
+ /* Check if it is constant but it is not legitimized. */
+ if (CONSTANT_P (operands[1])
+ && !arc_legitimate_constant_p (mode, operands[1]))
+ operands[1] = force_reg (mode, XEXP (operands[1], 0));
+ else if (MEM_P (operands[0])
+ && ((CONSTANT_P (operands[1])
+ && !satisfies_constraint_Cm3 (operands[1]))
+ || MEM_P (operands[1])))
+ operands[1] = force_reg (mode, operands[1]);
return false;
}
{
rtx addr, inner;
- if (flag_pic && SYMBOLIC_CONST (x))
- (x) = arc_legitimize_pic_address (x, 0);
addr = x;
if (GET_CODE (addr) == CONST)
addr = XEXP (addr, 0);
+
if (GET_CODE (addr) == PLUS
&& CONST_INT_P (XEXP (addr, 1))
&& ((GET_CODE (XEXP (addr, 0)) == SYMBOL_REF
static rtx
arc_legitimize_address (rtx orig_x, rtx oldx, machine_mode mode)
{
- if (GET_CODE (orig_x) == SYMBOL_REF)
- {
- enum tls_model model = SYMBOL_REF_TLS_MODEL (orig_x);
- if (model != 0)
- return arc_legitimize_tls_address (orig_x, model);
- }
-
rtx new_x = arc_legitimize_address_0 (orig_x, oldx, mode);
if (new_x)
projects / thirdparty / gcc.git / commitdiff
