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author | David Malcolm <dmalcolm@redhat.com> | 2020-08-17 11:53:45 -0400 |
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committer | David Malcolm <dmalcolm@redhat.com> | 2020-08-17 20:45:53 -0400 |
commit | 1b0be822208349b2795381deace2352e998c1ad0 (patch) | |
tree | eee5c1a4412343e249b2df49c2720378231369d2 /gcc/c | |
parent | deee2322a2b36c5f03802e63895a7ce9e814969c (diff) | |
download | gcc-1b0be822208349b2795381deace2352e998c1ad0.zip gcc-1b0be822208349b2795381deace2352e998c1ad0.tar.gz gcc-1b0be822208349b2795381deace2352e998c1ad0.tar.bz2 |
analyzer: fix ICE on unhandled tree codes in gassign [PR96640]
PR analyzer/96640 reports a ICE within region_model::on_assignment when
failing to handle a WIDEN_MULT_EVEN_EXPR, and various other tree codes.
The old implementation of region_model::on_assignment gracefully handled
tree codes it didn't understand, returning "UNKNOWN", whereas the new
implementation (r11-2694-g808f4dfeb3a95f50f15e71148e5c1067f90a126d) had
a "sorry_at" and an assertion left over from development, leading to ICEs.
This patch restores the old behavior for these cases, and marks various
vector operations as leading to unknown results.
gcc/analyzer/ChangeLog:
PR analyzer/96640
* region-model.cc (region_model::get_gassign_result): Handle various
VEC_* tree codes by returning UNKNOWN.
(region_model::on_assignment): Handle unrecognized tree codes by
setting lhs to an unknown value, rather than issuing a "sorry" and
asserting.
Diffstat (limited to 'gcc/c')
0 files changed, 0 insertions, 0 deletions