Tue, 12 Oct 2010 23:51:20 -0700
6991512: G1 barriers fail with 64bit C1
Summary: Fix compare-and-swap intrinsic problem with G1 post-barriers and issue with branch ranges in G1 stubs on sparc
Reviewed-by: never, kvn
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25 // machine-dependent implemention for register maps
26 friend class frame;
28 private:
29 intptr_t* _window; // register window save area (for L and I regs)
30 intptr_t* _younger_window; // previous save area (for O regs, if needed)
32 address pd_location(VMReg reg) const;
33 void pd_clear();
34 void pd_initialize_from(const RegisterMap* map) {
35 _window = map->_window;
36 _younger_window = map->_younger_window;
37 _location_valid[0] = 0; // avoid the shift_individual_registers game
38 }
39 void pd_initialize() {
40 _window = NULL;
41 _younger_window = NULL;
42 _location_valid[0] = 0; // avoid the shift_individual_registers game
43 }
44 void shift_window(intptr_t* sp, intptr_t* younger_sp) {
45 _window = sp;
46 _younger_window = younger_sp;
47 // Throw away locations for %i, %o, and %l registers:
48 // But do not throw away %g register locs.
49 if (_location_valid[0] != 0) shift_individual_registers();
50 }
51 void shift_individual_registers();
52 // When popping out of compiled frames, we make all IRegs disappear.
53 void make_integer_regs_unsaved() { _location_valid[0] = 0; }