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middle-end/102450 - avoid type_for_size for non-existing modes

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This avoids asking type_for_size for types with sizes for which
no scalar integer mode exists.  Instead the following uses
int_mode_for_size to get the same result.

2021-09-27  Richard Biener  <rguenther@suse.de>

	PR middle-end/102450
	* gimple-fold.c (gimple_fold_builtin_memory_op): Avoid using
	type_for_size, instead use int_mode_for_size.
This commit is contained in:
Richard Biener 2021-09-27 13:36:12 +02:00
parent da1f6391b7
commit d06dc8a2c7
1 changed files with 2 additions and 3 deletions
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5
gcc/gimple-fold.c
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@ -1001,9 +1001,7 @@ gimple_fold_builtin_memory_op (gimple_stmt_iterator *gsi,
return false;
scalar_int_mode mode;
tree type = lang_hooks.types.type_for_size (ilen * 8, 1);
if (type
&& is_a <scalar_int_mode> (TYPE_MODE (type), &mode)
if (int_mode_for_size (ilen * 8, 0).exists (&mode)
&& GET_MODE_SIZE (mode) * BITS_PER_UNIT == ilen * 8
&& have_insn_for (SET, mode)
/* If the destination pointer is not aligned we must be able
@ -1013,6 +1011,7 @@ gimple_fold_builtin_memory_op (gimple_stmt_iterator *gsi,
|| (optab_handler (movmisalign_optab, mode)
!= CODE_FOR_nothing)))
{
tree type = build_nonstandard_integer_type (ilen * 8, 1);
tree srctype = type;
tree desttype = type;
if (src_align < GET_MODE_ALIGNMENT (mode))