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author | Jakub Jelinek <jakub@redhat.com> | 2015-12-17 14:52:25 +0100 |
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committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2015-12-17 14:52:25 +0100 |
commit | 2833da1d2a52591aa76c867d00ea3f838f387736 (patch) | |
tree | b72d48432f46da6493f758fd909b5dbd54dee777 /gcc/tree.c | |
parent | 4fae9c1012246c77d6167388ba85c1b6e96c084b (diff) | |
download | gcc-2833da1d2a52591aa76c867d00ea3f838f387736.zip gcc-2833da1d2a52591aa76c867d00ea3f838f387736.tar.gz gcc-2833da1d2a52591aa76c867d00ea3f838f387736.tar.bz2 |
re PR tree-optimization/68835 (ICE in set_value_range, at tree-vrp.c:387, with __int128 bit field)
PR tree-optimization/68835
* tree.c (get_int_cst_ext_nunits): Return
cst.get_precision () / HOST_BITS_PER_WIDE_INT + 1
for all unsigned wi::neg_p (cst) constants.
(build_new_int_cst): If cst.get_precision is not a multiple
of HOST_BITS_PER_WIDE_INT, zero extend -1 to the precision
% HOST_BITS_PER_WIDE_INT.
* gcc.dg/pr68835-1.c: New test.
* gcc.dg/pr68835-2.c: New test.
From-SVN: r231757
Diffstat (limited to 'gcc/tree.c')
-rw-r--r-- | gcc/tree.c | 11 |
1 files changed, 5 insertions, 6 deletions
@@ -1245,11 +1245,9 @@ static unsigned int get_int_cst_ext_nunits (tree type, const wide_int &cst) { gcc_checking_assert (cst.get_precision () == TYPE_PRECISION (type)); - /* We need an extra zero HWI if CST is an unsigned integer with its - upper bit set, and if CST occupies a whole number of HWIs. */ - if (TYPE_UNSIGNED (type) - && wi::neg_p (cst) - && (cst.get_precision () % HOST_BITS_PER_WIDE_INT) == 0) + /* We need extra HWIs if CST is an unsigned integer with its + upper bit set. */ + if (TYPE_UNSIGNED (type) && wi::neg_p (cst)) return cst.get_precision () / HOST_BITS_PER_WIDE_INT + 1; return cst.get_len (); } @@ -1266,7 +1264,8 @@ build_new_int_cst (tree type, const wide_int &cst) if (len < ext_len) { --ext_len; - TREE_INT_CST_ELT (nt, ext_len) = 0; + TREE_INT_CST_ELT (nt, ext_len) + = zext_hwi (-1, cst.get_precision () % HOST_BITS_PER_WIDE_INT); for (unsigned int i = len; i < ext_len; ++i) TREE_INT_CST_ELT (nt, i) = -1; } |