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function.c (assign_parm_setup_reg): Handle misaligned stack arguments. 

2019-08-15  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * function.c (assign_parm_setup_reg): Handle misaligned stack arguments.

From-SVN: r274531
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Bernd Edlinger 2019-08-15 11:37:21 +00:00 committed by Bernd Edlinger
parent bbedc1ae06
commit 8340324579
2 changed files with 22 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2019-08-15 Bernd Edlinger <bernd.edlinger@hotmail.de>
* function.c (assign_parm_setup_reg): Handle misaligned stack arguments.
2019-08-15 Martin Liska <mliska@suse.cz>
* tree-ssa-dce.c (propagate_necessity): We can't reach now

19
gcc/function.c
View File

@ -3127,6 +3127,7 @@ assign_parm_setup_reg (struct assign_parm_data_all *all, tree parm,
int unsignedp = TYPE_UNSIGNED (TREE_TYPE (parm));
bool did_conversion = false;
bool need_conversion, moved;
enum insn_code icode;
rtx rtl;
/* Store the parm in a pseudoregister during the function, but we may
@ -3188,7 +3189,6 @@ assign_parm_setup_reg (struct assign_parm_data_all *all, tree parm,
conversion. We verify that this insn does not clobber any
hard registers. */
enum insn_code icode;
rtx op0, op1;
icode = can_extend_p (promoted_nominal_mode, data->passed_mode,
@ -3291,6 +3291,23 @@ assign_parm_setup_reg (struct assign_parm_data_all *all, tree parm,
did_conversion = true;
}
else if (MEM_P (data->entry_parm)
&& GET_MODE_ALIGNMENT (promoted_nominal_mode)
> MEM_ALIGN (data->entry_parm)
&& (((icode = optab_handler (movmisalign_optab,
promoted_nominal_mode))
!= CODE_FOR_nothing)
|| targetm.slow_unaligned_access (promoted_nominal_mode,
MEM_ALIGN (data->entry_parm))))
{
if (icode != CODE_FOR_nothing)
emit_insn (GEN_FCN (icode) (parmreg, validated_mem));
else
rtl = parmreg = extract_bit_field (validated_mem,
GET_MODE_BITSIZE (promoted_nominal_mode), 0,
unsignedp, parmreg,
promoted_nominal_mode, VOIDmode, false, NULL);
}
else
emit_move_insn (parmreg, validated_mem);