src/hotspot/share/opto/coalesce.cpp

rev 48658 : 8192992: Test8007294.java failed: attempted to spill a non-spillable item
Summary: Allow recompile without subsuming loads
Reviewed-by:

*** 26,35 ****
--- 26,36 ----
  #include "memory/allocation.inline.hpp"
  #include "opto/block.hpp"
  #include "opto/cfgnode.hpp"
  #include "opto/chaitin.hpp"
  #include "opto/coalesce.hpp"
+ #include "opto/c2compiler.hpp"
  #include "opto/connode.hpp"
  #include "opto/indexSet.hpp"
  #include "opto/machnode.hpp"
  #include "opto/matcher.hpp"
  #include "opto/regmask.hpp"
*** 292,304 ****
--- 293,311 ----
                // Copy any flags as well
                _phc.clone_projs(pred, pred->end_idx(), m, copy, _phc._lrg_map);
              } else {
                uint ireg = m->ideal_reg();
                if (ireg == 0 || ireg == Op_RegFlags) {
+                 if (C->subsume_loads() == true && !C->failing()) {
+                   // Retry with subsume_loads == false
+                   C->record_failure(C2Compiler::retry_no_subsuming_loads());
+                 } else {
                    assert(false, "attempted to spill a non-spillable item: %d: %s, ireg = %u, spill_type: %s",
                           m->_idx, m->Name(), ireg, MachSpillCopyNode::spill_type(MachSpillCopyNode::PhiInput));
+                   // Bailout without retry
                    C->record_method_not_compilable("attempted to spill a non-spillable item");
+                 }
                  return;
                }
                const RegMask *rm = C->matcher()->idealreg2spillmask[ireg];
                copy = new MachSpillCopyNode(MachSpillCopyNode::PhiInput, m, *rm, *rm);
                // Find a good place to insert.  Kinda tricky, use a subroutine