Cross Reference: /openjdk7/hotspot/src/share/vm/opto/loopTransform.cpp

Lines Matching defs:zero
225     Node *zero = phase->_igvn.intcon(0);
226     phase->set_ctrl(zero, phase->C->root());
227     n_inv1 = new (phase->C) SubINode(zero, inv1);
940   // Step A2: Build a zero-trip guard for the post-loop.  After leaving the
943   // the exit value (via unrolling) so we cannot constant-fold away the zero
1016   // Step B2: Build a zero-trip guard for the main-loop.  After leaving the
1018   // zero-trip guard will become the minimum-trip guard when we unroll
1175     // Search for zero-trip guard.
1185     // Occasionally it's possible for a zero-trip guard Opaque1 node to be
1189       return; // Cannot find zero-trip guard!  Bail out!
1219       // so we also don't need to adjust zero trip test.
1257           // zero trip guard limit will be different from loop limit.
1678       Node *zero = _igvn.intcon(0);
1679       set_ctrl(zero, C->root());
1680       *p_offset = zero;
1709         Node *zero = _igvn.intcon(0);
1710         set_ctrl(zero, C->root());
1712         Node* offset = new (C) SubINode(zero, exp->in(2));
1755   // Need to find the main-loop zero-trip guard
1765   // Can not optimize a loop if zero-trip Opaque1 node is optimized
1798   Node *zero = _igvn.intcon(0);
1802   set_ctrl(zero, C->root());
1855       // 'limit' maybe pinned below the zero trip test (probably from a
1857       // zero trip test expression which must occur before the zero test's if.
1875       // zero trip test.
1896           add_constraint( stride_con, scale_con, offset, zero, limit, pre_ctrl, &pre_limit, &main_limit );
1915           offset = new (C) SubINode( zero, offset );
1917           limit  = new (C) SubINode( zero, limit  );
2109   // main and post loops have explicitly created zero trip guard
2123     // Check for an obvious zero trip guard.
2142     tty->print("Removing empty loop with%s zero trip guard", needs_guard ? "out" : "");
2145     tty->print("Empty with%s zero trip guard   ", needs_guard ? "out" : "");
2151     // Peel the loop to ensure there's a zero trip guard
2282   // iteration of the unrolled body (zero-trip test required) and