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PR middle-end/92952 - gfortran.dg/lto/pr87689 FAILs at -O2

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gcc/ChangeLog:
	* builtins.c (compute_objsize): Adjust offset by the array low bound.

From-SVN: r279445
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Martin Sebor 2019-12-16 22:24:15 +00:00 • committed by Martin Sebor
parent a326a3dedb
commit 126036359a
2 changed files with 15 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-12-16 Martin Sebor <msebor@redhat.com>
PR middle-end/92952
* builtins.c (compute_objsize): Adjust offset by the array low bound.
2019-12-16 David Malcolm <dmalcolm@redhat.com>
* pretty-print.c (pp_write_text_as_html_like_dot_to_stream): New

10
gcc/builtins.c
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@ -3999,6 +3999,16 @@ compute_objsize (tree dest, int ostype, tree *pdecl /* = NULL */,
above. */
if (TREE_CODE (dest) == ARRAY_REF)
{
tree lowbnd = array_ref_low_bound (dest);
if (!integer_zerop (lowbnd) && tree_fits_uhwi_p (lowbnd))
{
/* Adjust the offset by the low bound of the array
domain (normally zero but 1 in Fortran). */
unsigned HOST_WIDE_INT lb = tree_to_uhwi (lowbnd);
offrng[0] -= lb;
offrng[1] -= lb;
}
/* Convert the array index into a byte offset. */
tree eltype = TREE_TYPE (dest);
tree tpsize = TYPE_SIZE_UNIT (eltype);