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Avoid outputting corrupt string constructor when host/target chars mismatch.

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* c-common.c (braced_list_to_string): Return CTOR unchanged
	if host and target character sizes don't match.
This commit is contained in:
Joern Rennecke 2021-05-17 10:57:23 +01:00
parent 3cbcb5d0cf
commit a8e19fa419
1 changed files with 6 additions and 0 deletions
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6
gcc/c-family/c-common.c
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@ -9059,6 +9059,12 @@ braced_list_to_string (tree type, tree ctor, bool member)
if (!member && !tree_fits_uhwi_p (typesize))
return ctor;
/* If the target char size differes from the host char size, we'd risk
loosing data and getting object sizes wrong by converting to
host chars. */
if (TYPE_PRECISION (char_type_node) != CHAR_BIT)
return ctor;
/* If the array has an explicit bound, use it to constrain the size
of the string. If it doesn't, be sure to create a string that's
as long as implied by the index of the last zero specified via