Hi!
When DSEing stmts with EH edges, we can invalidate through that dominator
info. Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux,
ok for trunk?
2019-07-16 Jakub Jelinek <ja...@redhat.com>
PR rtl-optimization/91164
* dse.c (rest_of_handle_dse): If dead edges have been purged,
invalidate dominance info.
* g++.dg/opt/pr91164.C: New test.
--- gcc/dse.c.jj 2019-07-10 15:52:56.753588824 +0200
+++ gcc/dse.c 2019-07-15 12:26:05.264010493 +0200
@@ -3621,7 +3621,10 @@ rest_of_handle_dse (void)
if ((locally_deleted || globally_deleted)
&& cfun->can_throw_non_call_exceptions
&& purge_all_dead_edges ())
- cleanup_cfg (0);
+ {
+ free_dominance_info (CDI_DOMINATORS);
+ cleanup_cfg (0);
+ }
return 0;
}
--- gcc/testsuite/g++.dg/opt/pr91164.C.jj 2019-07-15 13:03:56.449304956
+0200
+++ gcc/testsuite/g++.dg/opt/pr91164.C 2019-07-15 13:04:58.641354884 +0200
@@ -0,0 +1,89 @@
+// PR rtl-optimization/91164
+// { dg-do compile { target c++11 } }
+// { dg-options "-O2 -fdelete-dead-exceptions -fnon-call-exceptions
-fno-rerun-cse-after-loop -fno-tree-forwprop" }
+
+template <typename, typename = int> class b;
+template <int v> struct d { static constexpr int e = v; };
+template <bool, typename f> using g = f;
+struct h { template <typename i> using j = i; };
+template <typename, typename f> using k = h::j<f>;
+void *operator new(__SIZE_TYPE__, void *);
+struct l { l(); };
+struct m;
+template <typename n> n aa(m);
+struct o { template <typename> using ab = l; };
+template <typename, typename> struct b {
+ struct q : o::ab<int> { q(int, l = l()) : p() {} int p; } ac;
+ void ad();
+ b() : ac(0) {}
+ ~b() { bool r = ac.p == 0; if (r) ad(); }
+ const wchar_t *ae();
+};
+struct m {};
+struct t { virtual void f(); };
+struct u { l a; };
+struct af : t {
+ struct ag { ag(l); };
+ af(l ah) : ai(ah) {}
+ ag ai;
+};
+struct w {
+ template <typename f, typename x> w(f, x y) { new (0) af(y.a); }
+};
+struct z {
+ using aj = int;
+ template <typename x> z(x ah) : ak(al, ah) {}
+ aj al;
+ w ak;
+};
+struct am : z { template <typename x> am(x ah) : z(ah) {} };
+template <typename, typename x> am an(x) { return u{}; }
+template <typename> am ao() { return an<int>(l()); }
+struct ap {
+ k<int, int> aq;
+ k<int, int> ar;
+ k<int, int> as;
+};
+struct at { ap a; long au; ap av; ap aw; };
+struct ax { at c; ax() : c() {} };
+enum ay : int;
+ay az, ba;
+struct bb { bb(wchar_t *, wchar_t *, ay, m); };
+template <typename bc> struct bd {
+ typedef typename bc::be *bf;
+ bd(bf, bf, const typename bc::bg &, ay);
+ ay bh;
+ bb bi;
+ am bj;
+ typename bc::bk e;
+ ax bl;
+ int bm;
+};
+template <typename, typename> using bn = g<d<false>::e, am>;
+template <typename bc>
+bd<bc>::bd(bf ah, bf y, const typename bc::bg &bu, ay)
+ : bi(ah, y, bh, bu), bj(ao<bc>()), bm(aa<int>(bu)) {}
+struct bt { typedef wchar_t be; typedef b<be> bk; typedef m bg; };
+template <typename bc, typename bo> bn<bo, bc> bar();
+template <typename bc, typename bo> bn<bo, bc> bq(bo) {
+ typename bc::bg bp;
+ auto bs = nullptr;
+ using br = bd<bc>;
+ br(bs, bs, bp, ba);
+ return bar<bc, bo>();
+}
+struct bw {
+ bw();
+ template <typename bv, typename x> void assign(b<bv, x> ah) {
+ const wchar_t by = *ah.ae();
+ bw(&by, ah.ae(), bp, az);
+ }
+ template <typename bo> bw(bo, bo y, m, ay) : automaton(bq<bt>(y)) {}
+ m bp;
+ am automaton;
+};
+void bx() {
+ b<wchar_t> s;
+ bw ca;
+ ca.assign(s);
+}
Jakub
