7077312: Provide a CALL effect for instruct declaration in the ad file

Summary: abstracted way to declare that the MachNode has the effect of a call (kills caller save registers, preserves callee save registers)
Reviewed-by: twisti, never

src/share/vm/adlc/adlparse.cpp

@@ -3818,7 +3818,7 @@ void ADLParser::effect_parse(InstructForm *instr) {
     return;
   }
   // Get list of effect-operand pairs and insert into dictionary
-  else get_effectlist(instr->_effects, instr->_localNames);
+  else get_effectlist(instr->_effects, instr->_localNames, instr->_has_call);
 
   // Debug Stuff
   if (_AD._adl_debug > 1) fprintf(stderr,"Effect description: %s\n", desc);
@@ -4596,7 +4596,7 @@ void ADLParser::get_oplist(NameList &parameters, FormDict &operands) {
 // effect, and the second must be the name of an operand defined in the
 // operand list of this instruction.  Stores the names with a pointer to the
 // effect form in a local effects table.
-void ADLParser::get_effectlist(FormDict &effects, FormDict &operands) {
+void ADLParser::get_effectlist(FormDict &effects, FormDict &operands, bool& has_call) {
   OperandForm *opForm;
   Effect      *eForm;
   char        *ident;
@@ -4629,6 +4629,10 @@ void ADLParser::get_effectlist(FormDict &effects, FormDict &operands) {
       // Debugging Stuff
     if (_AD._adl_debug > 1) fprintf(stderr, "\tEffect Type: %s\t", ident);
     skipws();
+    if (eForm->is(Component::CALL)) {
+      if (_AD._adl_debug > 1) fprintf(stderr, "\n");
+      has_call = true;
+    } else {
       // Get name of operand and check that it is in the local name table
       if( (ident = get_unique_ident(effects, "effect")) == NULL) {
         parse_err(SYNERR, "missing operand identifier in effect list\n");
@@ -4649,6 +4653,7 @@ void ADLParser::get_effectlist(FormDict &effects, FormDict &operands) {
       effects.Insert(ident, eForm);
       // Debugging Stuff
       if (_AD._adl_debug > 1) fprintf(stderr, "\tOperand Name: %s\n", ident);
+    }
     skipws();
   } while(_curchar == ',');
 

src/share/vm/adlc/adlparse.hpp

@@ -232,7 +232,7 @@ protected:
   char *get_relation_dup(void);
 
   void  get_oplist(NameList &parameters, FormDict &operands);// Parse type-operand pairs
-  void  get_effectlist(FormDict &effects, FormDict &operands); // Parse effect-operand pairs
+  void  get_effectlist(FormDict &effects, FormDict &operands, bool& has_call); // Parse effect-operand pairs
   // Return the contents of a parenthesized expression.
   // Requires initial '(' and consumes final ')', which is replaced by '\0'.
   char *get_paren_expr(const char *description, bool include_location = false);

src/share/vm/adlc/archDesc.cpp

@@ -1018,6 +1018,9 @@ void ArchDesc::initBaseOpTypes() {
     ident = "TEMP";
     eForm = new Effect(ident);
     _globalNames.Insert(ident, eForm);
+    ident = "CALL";
+    eForm = new Effect(ident);
+    _globalNames.Insert(ident, eForm);
   }
 
   //

src/share/vm/adlc/formssel.cpp

@@ -31,7 +31,8 @@ InstructForm::InstructForm(const char *id, bool ideal_only)
   : _ident(id), _ideal_only(ideal_only),
     _localNames(cmpstr, hashstr, Form::arena),
     _effects(cmpstr, hashstr, Form::arena),
-    _is_mach_constant(false)
+    _is_mach_constant(false),
+    _has_call(false)
 {
       _ftype = Form::INS;
 
@@ -62,7 +63,8 @@ InstructForm::InstructForm(const char *id, InstructForm *instr, MatchRule *rule)
   : _ident(id), _ideal_only(false),
     _localNames(instr->_localNames),
     _effects(instr->_effects),
-    _is_mach_constant(false)
+    _is_mach_constant(false),
+    _has_call(false)
 {
       _ftype = Form::INS;
 
@@ -1754,6 +1756,7 @@ static int effect_lookup(const char *name) {
   if(!strcmp(name, "USE_KILL")) return Component::USE_KILL;
   if(!strcmp(name, "TEMP")) return Component::TEMP;
   if(!strcmp(name, "INVALID")) return Component::INVALID;
+  if(!strcmp(name, "CALL")) return Component::CALL;
   assert( false,"Invalid effect name specified\n");
   return Component::INVALID;
 }

src/share/vm/adlc/formssel.hpp

@@ -111,6 +111,8 @@ public:
   ComponentList  _components;      // List of Components matches MachNode's
                                    // operand structure
 
+  bool           _has_call;        // contain a call and caller save registers should be saved?
+
   // Public Methods
   InstructForm(const char *id, bool ideal_only = false);
   InstructForm(const char *id, InstructForm *instr, MatchRule *rule);
@@ -895,7 +897,8 @@ public:
     DEF     = 0x2, USE_DEF   = 0x3,
     KILL    = 0x4, USE_KILL  = 0x5,
     SYNTHETIC = 0x8,
-    TEMP = USE | SYNTHETIC
+    TEMP = USE | SYNTHETIC,
+    CALL = 0x10
   };
 };
 

src/share/vm/adlc/output_h.cpp

@@ -1720,6 +1720,16 @@ void ArchDesc::declareClasses(FILE *fp) {
       }
     }
 
+    // flag: if this instruction is implemented with a call
+    if ( instr->_has_call ) {
+      if ( node_flags_set ) {
+        fprintf(fp," | Flag_has_call");
+      } else {
+        fprintf(fp,"init_flags(Flag_has_call");
+        node_flags_set = true;
+      }
+    }
+
     if ( node_flags_set ) {
       fprintf(fp,"); ");
     }

src/share/vm/opto/block.hpp

@@ -281,6 +281,8 @@ class Block : public CFGElement {
   // Find and remove n from block list
   void find_remove( const Node *n );
 
+  // helper function that adds caller save registers to MachProjNode
+  void add_call_kills(MachProjNode *proj, RegMask& regs, const char* save_policy, bool exclude_soe);
   // Schedule a call next in the block
   uint sched_call(Matcher &matcher, Block_Array &bbs, uint node_cnt, Node_List &worklist, int *ready_cnt, MachCallNode *mcall, VectorSet &next_call);
 

src/share/vm/opto/idealGraphPrinter.cpp

@@ -447,6 +447,9 @@ void IdealGraphPrinter::visit_node(Node *n, bool edges, VectorSet* temp_set) {
     if (flags & Node::Flag_may_be_short_branch) {
       print_prop("may_be_short_branch", "true");
     }
+    if (flags & Node::Flag_has_call) {
+      print_prop("has_call", "true");
+    }
 
     if (C->matcher() != NULL) {
       if (C->matcher()->is_shared(node)) {

src/share/vm/opto/lcm.cpp

@@ -548,6 +548,22 @@ void Block::needed_for_next_call(Node *this_call, VectorSet &next_call, Block_Ar
   set_next_call(call, next_call, bbs);
 }
 
+//------------------------------add_call_kills-------------------------------------
+void Block::add_call_kills(MachProjNode *proj, RegMask& regs, const char* save_policy, bool exclude_soe) {
+  // Fill in the kill mask for the call
+  for( OptoReg::Name r = OptoReg::Name(0); r < _last_Mach_Reg; r=OptoReg::add(r,1) ) {
+    if( !regs.Member(r) ) {     // Not already defined by the call
+      // Save-on-call register?
+      if ((save_policy[r] == 'C') ||
+          (save_policy[r] == 'A') ||
+          ((save_policy[r] == 'E') && exclude_soe)) {
+        proj->_rout.Insert(r);
+      }
+    }
+  }
+}
+
+
 //------------------------------sched_call-------------------------------------
 uint Block::sched_call( Matcher &matcher, Block_Array &bbs, uint node_cnt, Node_List &worklist, int *ready_cnt, MachCallNode *mcall, VectorSet &next_call ) {
   RegMask regs;
@@ -631,17 +647,7 @@ uint Block::sched_call( Matcher &matcher, Block_Array &bbs, uint node_cnt, Node_
       proj->_rout.OR(Matcher::method_handle_invoke_SP_save_mask());
   }
 
-  // Fill in the kill mask for the call
-  for( OptoReg::Name r = OptoReg::Name(0); r < _last_Mach_Reg; r=OptoReg::add(r,1) ) {
-    if( !regs.Member(r) ) {     // Not already defined by the call
-      // Save-on-call register?
-      if ((save_policy[r] == 'C') ||
-          (save_policy[r] == 'A') ||
-          ((save_policy[r] == 'E') && exclude_soe)) {
-        proj->_rout.Insert(r);
-      }
-    }
-  }
+  add_call_kills(proj, regs, save_policy, exclude_soe);
 
   return node_cnt;
 }
@@ -776,6 +782,7 @@ bool Block::schedule_local(PhaseCFG *cfg, Matcher &matcher, int *ready_cnt, Vect
     }
 #endif
 
+  uint max_idx = matcher.C->unique();
   // Pull from worklist and schedule
   while( worklist.size() ) {    // Worklist is not ready
 
@@ -815,11 +822,28 @@ bool Block::schedule_local(PhaseCFG *cfg, Matcher &matcher, int *ready_cnt, Vect
       phi_cnt = sched_call(matcher, cfg->_bbs, phi_cnt, worklist, ready_cnt, mcall, next_call);
       continue;
     }
+
+    if (n->is_Mach() && n->as_Mach()->has_call()) {
+      RegMask regs;
+      regs.Insert(matcher.c_frame_pointer());
+      regs.OR(n->out_RegMask());
+
+      MachProjNode *proj = new (matcher.C, 1) MachProjNode( n, 1, RegMask::Empty, MachProjNode::fat_proj );
+      cfg->_bbs.map(proj->_idx,this);
+      _nodes.insert(phi_cnt++, proj);
+
+      add_call_kills(proj, regs, matcher._c_reg_save_policy, false);
+    }
+
     // Children are now all ready
     for (DUIterator_Fast i5max, i5 = n->fast_outs(i5max); i5 < i5max; i5++) {
       Node* m = n->fast_out(i5); // Get user
       if( cfg->_bbs[m->_idx] != this ) continue;
       if( m->is_Phi() ) continue;
+      if (m->_idx > max_idx) { // new node, skip it
+        assert(m->is_MachProj() && n->is_Mach() && n->as_Mach()->has_call(), "unexpected node types");
+        continue;
+      }
       if( !--ready_cnt[m->_idx] )
         worklist.push(m);
     }

src/share/vm/opto/machnode.hpp

@@ -190,6 +190,9 @@ public:
   // Avoid back to back some instructions on some CPUs.
   bool avoid_back_to_back() const { return (flags() & Flag_avoid_back_to_back) != 0; }
 
+  // instruction implemented with a call
+  bool has_call() const { return (flags() & Flag_has_call) != 0; }
+
   // First index in _in[] corresponding to operand, or -1 if there is none
   int  operand_index(uint operand) const;
 

src/share/vm/opto/node.hpp

@@ -641,7 +641,8 @@ public:
     Flag_is_dead_loop_safe   = Flag_is_cisc_alternate << 1,
     Flag_may_be_short_branch = Flag_is_dead_loop_safe << 1,
     Flag_avoid_back_to_back  = Flag_may_be_short_branch << 1,
-    _max_flags = (Flag_avoid_back_to_back << 1) - 1 // allow flags combination
+    Flag_has_call            = Flag_avoid_back_to_back << 1,
+    _max_flags = (Flag_has_call << 1) - 1 // allow flags combination
   };
 
 private: