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PR middle-end/90597: gcc_assert ICE in layout_type

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This patch fixes the default implementation of TARGET_VECTOR_ALIGNMENT,
known as default_vector_alignment, using the same logic as my earlier
nvptx patch, as the ICE caused by TYPE_SIZE(type) being zero during
error handling in gcc.dg/attr-vector_size.c is common among backends,
and is known in bugzilla as PR middle-end/90597, apparently a recent
regression.

2020-09-01  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog:
	PR middle-end/90597
	* targhooks.c (default_vector_alignment): Return at least the
	GET_MODE_ALIGNMENT for the type's mode.
This commit is contained in:
Roger Sayle 2020-09-01 12:03:21 +01:00
parent 3d137b75fe
commit b61eaa25b0
1 changed files with 3 additions and 2 deletions
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5
gcc/targhooks.c
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@ -1233,8 +1233,9 @@ default_vector_alignment (const_tree type)
tree size = TYPE_SIZE (type);
if (tree_fits_uhwi_p (size))
align = tree_to_uhwi (size);
return align < MAX_OFILE_ALIGNMENT ? align : MAX_OFILE_ALIGNMENT;
if (align >= MAX_OFILE_ALIGNMENT)
return MAX_OFILE_ALIGNMENT;
return MAX (align, GET_MODE_ALIGNMENT (TYPE_MODE (type)));
}
/* The default implementation of