re PR tree-optimization/60023 (ICE: verify_gimple failed: dead STMT in EH table with -O3 -fnon-call-exceptions -mavx2)

PR tree-optimization/60023
	* tree-if-conv.c (predicate_mem_writes): Pass true instead of
	false to gsi_replace.
	* tree-vect-stmts.c (vect_finish_stmt_generation): If stmt
	has been in some EH region and vec_stmt could throw, add
	vec_stmt into the same EH region.
	* tree-data-ref.c (get_references_in_stmt): If IFN_MASK_LOAD
	has no lhs, ignore it.
	* internal-fn.c (expand_MASK_LOAD): Likewise.

	* g++.dg/vect/pr60023.cc: New test.

From-SVN: r207464

gcc/ChangeLog

@@ -1,5 +1,15 @@
 2014-02-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/60023
+	* tree-if-conv.c (predicate_mem_writes): Pass true instead of
+	false to gsi_replace.
+	* tree-vect-stmts.c (vect_finish_stmt_generation): If stmt
+	has been in some EH region and vec_stmt could throw, add
+	vec_stmt into the same EH region.
+	* tree-data-ref.c (get_references_in_stmt): If IFN_MASK_LOAD
+	has no lhs, ignore it.
+	* internal-fn.c (expand_MASK_LOAD): Likewise.
+
 	PR ipa/60026
 	* tree-inline.c (copy_forbidden): Fail for
 	__attribute__((optimize (0))) functions.

gcc/internal-fn.c

@@ -820,6 +820,8 @@ expand_MASK_LOAD (gimple stmt)
 
   maskt = gimple_call_arg (stmt, 2);
   lhs = gimple_call_lhs (stmt);
+  if (lhs == NULL_TREE)
+    return;
   type = TREE_TYPE (lhs);
   rhs = fold_build2 (MEM_REF, type, gimple_call_arg (stmt, 0),
 		     gimple_call_arg (stmt, 1));

gcc/testsuite/ChangeLog

@@ -1,5 +1,8 @@
 2014-02-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/60023
+	* g++.dg/vect/pr60023.cc: New test.
+
 	PR ipa/60026
 	* c-c++-common/torture/pr60026.c: New test.
 

gcc/testsuite/g++.dg/vect/pr60023.cc

@@ -0,0 +1,80 @@
+// PR tree-optimization/60023
+// { dg-do compile }
+// { dg-additional-options "-O3 -std=c++11 -fnon-call-exceptions" }
+// { dg-additional-options "-mavx2" { target { i?86-*-* x86_64-*-* } } }
+
+struct A { A (); ~A (); };
+
+void
+f1 (int *p, int *q, int *r) noexcept (true)
+{
+  int i;
+  for (i = 0; i < 1024; i++)
+    if (r[i])
+      p[i] = q[i] + 1;
+}
+
+void
+f2 (int *p, int *q, int *r)
+{
+  int i;
+  for (i = 0; i < 1024; i++)
+    if (r[i])
+      p[i] = q[i] + 1;
+}
+
+void
+f3 (int *p, int *q) noexcept (true)
+{
+  int i;
+  for (i = 0; i < 1024; i++)
+    p[i] = q[i] + 1;
+}
+
+void
+f4 (int *p, int *q)
+{
+  int i;
+  for (i = 0; i < 1024; i++)
+    p[i] = q[i] + 1;
+}
+
+void
+f5 (int *p, int *q, int *r) noexcept (true)
+{
+  int i;
+  A a;
+  for (i = 0; i < 1024; i++)
+    if (r[i])
+      p[i] = q[i] + 1;
+}
+
+void
+f6 (int *p, int *q, int *r)
+{
+  int i;
+  A a;
+  for (i = 0; i < 1024; i++)
+    if (r[i])
+      p[i] = q[i] + 1;
+}
+
+void
+f7 (int *p, int *q) noexcept (true)
+{
+  int i;
+  A a;
+  for (i = 0; i < 1024; i++)
+    p[i] = q[i] + 1;
+}
+
+void
+f8 (int *p, int *q)
+{
+  int i;
+  A a;
+  for (i = 0; i < 1024; i++)
+    p[i] = q[i] + 1;
+}
+
+// { dg-final { cleanup-tree-dump "vect" } }

gcc/tree-data-ref.c

@@ -4401,6 +4401,8 @@ get_references_in_stmt (gimple stmt, vec<data_ref_loc, va_heap> *references)
 	switch (gimple_call_internal_fn (stmt))
 	  {
 	  case IFN_MASK_LOAD:
+	    if (gimple_call_lhs (stmt) == NULL_TREE)
+	      break;
 	    ref.is_read = true;
 	  case IFN_MASK_STORE:
 	    ref.ref = fold_build2 (MEM_REF,

gcc/tree-if-conv.c

@@ -1723,7 +1723,7 @@ predicate_mem_writes (loop_p loop)
 	      new_stmt
 		= gimple_build_call_internal (IFN_MASK_STORE, 4, addr, ptr,
 					      mask, rhs);
-	    gsi_replace (&gsi, new_stmt, false);
+	    gsi_replace (&gsi, new_stmt, true);
 	  }
 	else if (gimple_vdef (stmt))
 	  {

gcc/tree-vect-stmts.c

@@ -1691,6 +1691,13 @@ vect_finish_stmt_generation (gimple stmt, gimple vec_stmt,
     }
 
   gimple_set_location (vec_stmt, gimple_location (stmt));
+
+  /* While EH edges will generally prevent vectorization, stmt might
+     e.g. be in a must-not-throw region.  Ensure newly created stmts
+     that could throw are part of the same region.  */
+  int lp_nr = lookup_stmt_eh_lp (stmt);
+  if (lp_nr != 0 && stmt_could_throw_p (vec_stmt))
+    add_stmt_to_eh_lp (vec_stmt, lp_nr);
 }
 
 /* Checks if CALL can be vectorized in type VECTYPE.  Returns