2019-08-15 Bernd Edlinger Richard Biener * expr.c (expand_assignment): Handle misaligned DECLs. (expand_expr_real_1): Handle FUNCTION_DECL as unaligned. * function.c (assign_parm_adjust_stack_rtl): Check movmisalign optab too. (assign_parm_setup_stack): Allocate properly aligned stack slots. * varasm.c (build_constant_desc): Align constants of misaligned types. * config/arm/predicates.md (aligned_operand): New predicate. * config/arm/arm.md (movdi, movsi, movhi, movhf, movsf, movdf): Use sligned_operand to check restrictions on memory addresses. * config/arm/neon.md (movti, mov, mov): Likewise. * config/arm/vec-common.md (mov): Likewise. Index: gcc/config/arm/arm.md =================================================================== --- gcc/config/arm/arm.md (revision 274946) +++ gcc/config/arm/arm.md (working copy) @@ -5231,6 +5231,8 @@ (match_operand:DI 1 "general_operand"))] "TARGET_EITHER" " + gcc_checking_assert (aligned_operand (operands[0], DImode)); + gcc_checking_assert (aligned_operand (operands[1], DImode)); if (can_create_pseudo_p ()) { if (!REG_P (operands[0])) @@ -5407,6 +5409,8 @@ { rtx base, offset, tmp; + gcc_checking_assert (aligned_operand (operands[0], SImode)); + gcc_checking_assert (aligned_operand (operands[1], SImode)); if (TARGET_32BIT || TARGET_HAVE_MOVT) { /* Everything except mem = const or mem = mem can be done easily. */ @@ -5896,6 +5900,8 @@ (match_operand:HI 1 "general_operand"))] "TARGET_EITHER" " + gcc_checking_assert (aligned_operand (operands[0], HImode)); + gcc_checking_assert (aligned_operand (operands[1], HImode)); if (TARGET_ARM) { if (can_create_pseudo_p ()) @@ -6305,6 +6311,8 @@ (match_operand:HF 1 "general_operand"))] "TARGET_EITHER" " + gcc_checking_assert (aligned_operand (operands[0], HFmode)); + gcc_checking_assert (aligned_operand (operands[1], HFmode)); if (TARGET_32BIT) { if (MEM_P (operands[0])) @@ -6369,6 +6377,8 @@ (match_operand:SF 1 "general_operand"))] "TARGET_EITHER" " + gcc_checking_assert (aligned_operand (operands[0], SFmode)); + gcc_checking_assert (aligned_operand (operands[1], SFmode)); if (TARGET_32BIT) { if (MEM_P (operands[0])) @@ -6464,6 +6474,8 @@ (match_operand:DF 1 "general_operand"))] "TARGET_EITHER" " + gcc_checking_assert (aligned_operand (operands[0], DFmode)); + gcc_checking_assert (aligned_operand (operands[1], DFmode)); if (TARGET_32BIT) { if (MEM_P (operands[0])) Index: gcc/config/arm/neon.md =================================================================== --- gcc/config/arm/neon.md (revision 274946) +++ gcc/config/arm/neon.md (working copy) @@ -127,6 +127,8 @@ (match_operand:TI 1 "general_operand"))] "TARGET_NEON" { + gcc_checking_assert (aligned_operand (operands[0], TImode)); + gcc_checking_assert (aligned_operand (operands[1], TImode)); if (can_create_pseudo_p ()) { if (!REG_P (operands[0])) @@ -139,6 +141,8 @@ (match_operand:VSTRUCT 1 "general_operand"))] "TARGET_NEON" { + gcc_checking_assert (aligned_operand (operands[0], mode)); + gcc_checking_assert (aligned_operand (operands[1], mode)); if (can_create_pseudo_p ()) { if (!REG_P (operands[0])) @@ -151,6 +155,8 @@ (match_operand:VH 1 "s_register_operand"))] "TARGET_NEON" { + gcc_checking_assert (aligned_operand (operands[0], mode)); + gcc_checking_assert (aligned_operand (operands[1], mode)); if (can_create_pseudo_p ()) { if (!REG_P (operands[0])) Index: gcc/config/arm/predicates.md =================================================================== --- gcc/config/arm/predicates.md (revision 274946) +++ gcc/config/arm/predicates.md (working copy) @@ -697,3 +697,7 @@ (ior (and (match_code "symbol_ref") (match_test "!arm_is_long_call_p (SYMBOL_REF_DECL (op))")) (match_operand 0 "s_register_operand"))) + +(define_special_predicate "aligned_operand" + (ior (not (match_code "mem")) + (match_test "MEM_ALIGN (op) >= GET_MODE_ALIGNMENT (mode)"))) Index: gcc/config/arm/vec-common.md =================================================================== --- gcc/config/arm/vec-common.md (revision 274946) +++ gcc/config/arm/vec-common.md (working copy) @@ -26,6 +26,8 @@ "TARGET_NEON || (TARGET_REALLY_IWMMXT && VALID_IWMMXT_REG_MODE (mode))" { + gcc_checking_assert (aligned_operand (operands[0], mode)); + gcc_checking_assert (aligned_operand (operands[1], mode)); if (can_create_pseudo_p ()) { if (!REG_P (operands[0])) Index: gcc/expr.c =================================================================== --- gcc/expr.c (revision 274946) +++ gcc/expr.c (working copy) @@ -5001,9 +5001,10 @@ expand_assignment (tree to, tree from, bool nontem /* Handle misaligned stores. */ mode = TYPE_MODE (TREE_TYPE (to)); if ((TREE_CODE (to) == MEM_REF - || TREE_CODE (to) == TARGET_MEM_REF) + || TREE_CODE (to) == TARGET_MEM_REF + || DECL_P (to)) && mode != BLKmode - && !mem_ref_refers_to_non_mem_p (to) + && (DECL_P (to) || !mem_ref_refers_to_non_mem_p (to)) && ((align = get_object_alignment (to)) < GET_MODE_ALIGNMENT (mode)) && (((icode = optab_handler (movmisalign_optab, mode)) @@ -10795,6 +10796,14 @@ expand_expr_real_1 (tree exp, rtx target, machine_ MEM_VOLATILE_P (op0) = 1; } + if (MEM_P (op0) && TREE_CODE (tem) == FUNCTION_DECL) + { + if (op0 == orig_op0) + op0 = copy_rtx (op0); + + set_mem_align (op0, BITS_PER_UNIT); + } + /* In cases where an aligned union has an unaligned object as a field, we might be extracting a BLKmode value from an integer-mode (e.g., SImode) object. Handle this case Index: gcc/function.c =================================================================== --- gcc/function.c (revision 274946) +++ gcc/function.c (working copy) @@ -2807,8 +2807,10 @@ assign_parm_adjust_stack_rtl (struct assign_parm_d stack slot, if we need one. */ if (stack_parm && ((GET_MODE_ALIGNMENT (data->nominal_mode) > MEM_ALIGN (stack_parm) - && targetm.slow_unaligned_access (data->nominal_mode, - MEM_ALIGN (stack_parm))) + && ((optab_handler (movmisalign_optab, data->nominal_mode) + != CODE_FOR_nothing) + || targetm.slow_unaligned_access (data->nominal_mode, + MEM_ALIGN (stack_parm)))) || (data->nominal_type && TYPE_ALIGN (data->nominal_type) > MEM_ALIGN (stack_parm) && MEM_ALIGN (stack_parm) < PREFERRED_STACK_BOUNDARY))) @@ -3461,11 +3463,20 @@ assign_parm_setup_stack (struct assign_parm_data_a int align = STACK_SLOT_ALIGNMENT (data->arg.type, GET_MODE (data->entry_parm), TYPE_ALIGN (data->arg.type)); + if (align < (int)GET_MODE_ALIGNMENT (GET_MODE (data->entry_parm)) + && ((optab_handler (movmisalign_optab, + GET_MODE (data->entry_parm)) + != CODE_FOR_nothing) + || targetm.slow_unaligned_access (GET_MODE (data->entry_parm), + align))) + align = GET_MODE_ALIGNMENT (GET_MODE (data->entry_parm)); data->stack_parm = assign_stack_local (GET_MODE (data->entry_parm), GET_MODE_SIZE (GET_MODE (data->entry_parm)), align); + align = MEM_ALIGN (data->stack_parm); set_mem_attributes (data->stack_parm, parm, 1); + set_mem_align (data->stack_parm, align); } dest = validize_mem (copy_rtx (data->stack_parm)); Index: gcc/varasm.c =================================================================== --- gcc/varasm.c (revision 274946) +++ gcc/varasm.c (working copy) @@ -47,6 +47,7 @@ along with GCC; see the file COPYING3. If not see #include "stmt.h" #include "expr.h" #include "expmed.h" +#include "optabs.h" #include "output.h" #include "langhooks.h" #include "debug.h" @@ -3386,7 +3387,15 @@ build_constant_desc (tree exp) if (TREE_CODE (exp) == STRING_CST) SET_DECL_ALIGN (decl, targetm.constant_alignment (exp, DECL_ALIGN (decl))); else - align_variable (decl, 0); + { + align_variable (decl, 0); + if (DECL_ALIGN (decl) < GET_MODE_ALIGNMENT (DECL_MODE (decl)) + && ((optab_handler (movmisalign_optab, DECL_MODE (decl)) + != CODE_FOR_nothing) + || targetm.slow_unaligned_access (DECL_MODE (decl), + DECL_ALIGN (decl)))) + SET_DECL_ALIGN (decl, GET_MODE_ALIGNMENT (DECL_MODE (decl))); + } /* Now construct the SYMBOL_REF and the MEM. */ if (use_object_blocks_p ())