}
}
-/* Return the alignment of the object EXP, also considering its type
- when we do not know of explicit misalignment.
- ??? Note that, in the general case, the type of an expression is not kept
- consistent with misalignment information by the front-end, for
- example when taking the address of a member of a packed structure.
- However, in most of the cases, expressions have the alignment of
- their type, so we optimistically fall back to the alignment of the
- type when we cannot compute a misalignment. */
-
-static unsigned int
-get_object_or_type_alignment (tree exp)
-{
- unsigned HOST_WIDE_INT misalign;
- unsigned int align = get_object_alignment_1 (exp, &misalign);
- if (misalign != 0)
- align = (misalign & -misalign);
- else
- align = MAX (TYPE_ALIGN (TREE_TYPE (exp)), align);
- return align;
-}
-
/* Expand an assignment that stores the value of FROM into TO. If NONTEMPORAL
is true, try generating a nontemporal store. */
}
if (modifier != EXPAND_INITIALIZER
- && modifier != EXPAND_CONST_ADDRESS)
+ && modifier != EXPAND_CONST_ADDRESS
+ && modifier != EXPAND_SUM)
result = force_operand (result, target);
return result;
}
case VEC_EXTRACT_EVEN_EXPR:
case VEC_EXTRACT_ODD_EXPR:
- {
- expand_operands (treeop0, treeop1,
- NULL_RTX, &op0, &op1, EXPAND_NORMAL);
- this_optab = optab_for_tree_code (code, type, optab_default);
- temp = expand_binop (mode, this_optab, op0, op1, target, unsignedp,
- OPTAB_WIDEN);
- gcc_assert (temp);
- return temp;
- }
-
case VEC_INTERLEAVE_HIGH_EXPR:
case VEC_INTERLEAVE_LOW_EXPR:
- {
- expand_operands (treeop0, treeop1,
- NULL_RTX, &op0, &op1, EXPAND_NORMAL);
- this_optab = optab_for_tree_code (code, type, optab_default);
- temp = expand_binop (mode, this_optab, op0, op1, target, unsignedp,
- OPTAB_WIDEN);
- gcc_assert (temp);
- return temp;
- }
+ goto binop;
case VEC_LSHIFT_EXPR:
case VEC_RSHIFT_EXPR:
case VEC_PERM_EXPR:
expand_operands (treeop0, treeop1, target, &op0, &op1, EXPAND_NORMAL);
op2 = expand_normal (treeop2);
+
+ /* Careful here: if the target doesn't support integral vector modes,
+ a constant selection vector could wind up smooshed into a normal
+ integral constant. */
+ if (CONSTANT_P (op2) && GET_CODE (op2) != CONST_VECTOR)
+ {
+ tree sel_type = TREE_TYPE (treeop2);
+ enum machine_mode vmode
+ = mode_for_vector (TYPE_MODE (TREE_TYPE (sel_type)),
+ TYPE_VECTOR_SUBPARTS (sel_type));
+ gcc_assert (GET_MODE_CLASS (vmode) == MODE_VECTOR_INT);
+ op2 = simplify_subreg (vmode, op2, TYPE_MODE (sel_type), 0);
+ gcc_assert (op2 && GET_CODE (op2) == CONST_VECTOR);
+ }
+ else
+ gcc_assert (GET_MODE_CLASS (GET_MODE (op2)) == MODE_VECTOR_INT);
+
temp = expand_vec_perm (mode, op0, op1, op2, target);
gcc_assert (temp);
return temp;
&& modifier != EXPAND_CONST_ADDRESS
&& modifier != EXPAND_INITIALIZER)
/* If the field is volatile, we always want an aligned
- access. Only do this if the access is not already naturally
+ access. Do this in following two situations:
+ 1. the access is not already naturally
aligned, otherwise "normal" (non-bitfield) volatile fields
- become non-addressable. */
+ become non-addressable.
+ 2. the bitsize is narrower than the access size. Need
+ to extract bitfields from the access. */
|| (volatilep && flag_strict_volatile_bitfields > 0
- && (bitpos % GET_MODE_ALIGNMENT (mode) != 0))
+ && (bitpos % GET_MODE_ALIGNMENT (mode) != 0
+ || (mode1 != BLKmode
+ && bitsize < GET_MODE_SIZE (mode1) * BITS_PER_UNIT)))
/* If the field isn't aligned enough to fetch as a memref,
fetch it as a bit field. */
|| (mode1 != BLKmode
so we just call into the folder and expand its result. */
if ((code == NE || code == EQ)
- && TREE_CODE (arg0) == BIT_AND_EXPR && integer_zerop (arg1)
- && integer_pow2p (TREE_OPERAND (arg0, 1))
+ && integer_zerop (arg1)
&& (TYPE_PRECISION (ops->type) != 1 || TYPE_UNSIGNED (ops->type)))
{
- tree type = lang_hooks.types.type_for_mode (mode, unsignedp);
- return expand_expr (fold_single_bit_test (loc,
- code == NE ? NE_EXPR : EQ_EXPR,
- arg0, arg1, type),
- target, VOIDmode, EXPAND_NORMAL);
+ gimple srcstmt = get_def_for_expr (arg0, BIT_AND_EXPR);
+ if (srcstmt
+ && integer_pow2p (gimple_assign_rhs2 (srcstmt)))
+ {
+ enum tree_code tcode = code == NE ? NE_EXPR : EQ_EXPR;
+ tree type = lang_hooks.types.type_for_mode (mode, unsignedp);
+ tree temp = fold_build2_loc (loc, BIT_AND_EXPR, TREE_TYPE (arg1),
+ gimple_assign_rhs1 (srcstmt),
+ gimple_assign_rhs2 (srcstmt));
+ temp = fold_single_bit_test (loc, tcode, temp, arg1, type);
+ if (temp)
+ return expand_expr (temp, target, VOIDmode, EXPAND_NORMAL);
+ }
}
if (! get_subtarget (target)
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