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* [gcc r12-9482] PR tree-optimization/109392
@ 2023-04-27 13:19 Richard Biener
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From: Richard Biener @ 2023-04-27 13:19 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d639236ea87ff8a6a2d56c0408e6eb92674418e6
commit r12-9482-gd639236ea87ff8a6a2d56c0408e6eb92674418e6
Author: Jakub Jelinek <jakub@redhat.com>
Date: Sat Apr 8 12:21:42 2023 -0600
PR tree-optimization/109392
If we have an object with SSA_NAME_OCCURS_IN_ABNORMAL_PHI, then
maybe_push_res_to_seq may fail. Directly build the extraction
for that case.
PR tree-optimization/109392
gcc/
* tree-vect-generic.cc (tree_vec_extract): Handle failure
of maybe_push_res_to_seq better.
gcc/testsuite/
* gcc.dg/pr109392.c: New test.
(cherry picked from commit 101380a8394c22a7a2ea70de2060ee93716156e2)
Diff:
---
gcc/testsuite/gcc.dg/pr109392.c | 15 +++++++++++++++
gcc/tree-vect-generic.cc | 11 ++++++++++-
2 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/gcc/testsuite/gcc.dg/pr109392.c b/gcc/testsuite/gcc.dg/pr109392.c
new file mode 100644
index 00000000000..e5bd9d440fa
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr109392.c
@@ -0,0 +1,15 @@
+/* PR tree-optimization/109392 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -Wno-psabi" } */
+
+typedef short __attribute__ ((__vector_size__ (64))) V;
+V v, w;
+void bar (void) __attribute__((returns_twice));
+
+V
+foo (V a, V b)
+{
+ bar ();
+ b &= v < b;
+ return (V) { foo (b, w)[3], (V) {}[3] };
+}
diff --git a/gcc/tree-vect-generic.cc b/gcc/tree-vect-generic.cc
index a84f5e4ca78..f282e69d53b 100644
--- a/gcc/tree-vect-generic.cc
+++ b/gcc/tree-vect-generic.cc
@@ -183,7 +183,16 @@ tree_vec_extract (gimple_stmt_iterator *gsi, tree type,
opr.resimplify (NULL, follow_all_ssa_edges);
gimple_seq stmts = NULL;
tree res = maybe_push_res_to_seq (&opr, &stmts);
- gcc_assert (res);
+ if (!res)
+ {
+ /* This can happen if SSA_NAME_OCCURS_IN_ABNORMAL_PHI are
+ used. Build BIT_FIELD_REF manually otherwise. */
+ t = build3 (BIT_FIELD_REF, type, t, bitsize, bitpos);
+ res = make_ssa_name (type);
+ gimple *g = gimple_build_assign (res, t);
+ gsi_insert_before (gsi, g, GSI_SAME_STMT);
+ return res;
+ }
gsi_insert_seq_before (gsi, stmts, GSI_SAME_STMT);
return res;
}
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