vm/opto/buildOopMap.cpp

105   OopMap *build_oop_map( Node *n, int max_reg, PhaseRegAlloc *regalloc, int* live );
118         int *live = (int*) (*safehash)[n];
119         assert( live, "must find live" );
120         n->as_MachSafePoint()->set_oop_map( build_oop_map(n,max_reg,regalloc, live) );
200 static int get_live_bit( int *live, int reg ) {
201   return live[reg>>LogBitsPerInt] &   (1<<(reg&(BitsPerInt-1))); }
202 static void set_live_bit( int *live, int reg ) {
203          live[reg>>LogBitsPerInt] |=  (1<<(reg&(BitsPerInt-1))); }
204 static void clr_live_bit( int *live, int reg ) {
205          live[reg>>LogBitsPerInt] &= ~(1<<(reg&(BitsPerInt-1))); }
208 OopMap *OopFlow::build_oop_map( Node *n, int max_reg, PhaseRegAlloc *regalloc, int* live ) {
220     if( get_live_bit(live,reg) == 0 )
221       continue;                 // Ignore if not live
238     assert( def, "since live better have reaching def" );
263           // this live-range is one of them.
304         // live.  This is because argument oops are NOT live at a
308         if( get_live_bit(live,breg) == 0 ) {// Not live?
310           set_live_bit(live,breg);
333           // this live-range is one of them.
359         assert(false, "there should be a oop in OopMap instead of a live raw oop at safepoint");
397   int* live = NEW_ARENA_ARRAY(A, int, (cfg->number_of_blocks() + 1) * max_reg_ints);
398   int* tmp_live = &live[cfg->number_of_blocks() * max_reg_ints];
406   memset(live, 0, cfg->number_of_blocks() * (max_reg_ints << LogBytesPerInt));
424       int *t = &live[s0num*max_reg_ints];
428       // OR in the remaining live registers
431         int *t = &live[sjnum*max_reg_ints];
436       // Now walk tmp_live up the block backwards, computing live
466           // live vector 4987749.
498           // considered live at the callsite's OopMap.  Argument oops are
499           // hence live, but NOT included in the oopmap.  See cutout in
500           // build_oop_map.  Debug oops are live (and in OopMap).
511       int *old_live = &live[b->_pre_order*max_reg_ints];
548       tty->print_cr("retripping live calc");
603     // irreducible loops).  This is OK, since every live value must have the