src/hotspot/cpu/aarch64/macroAssembler_aarch64.hpp

rev 48751 : 8196064: AArch64: Merging ld/st into ldp/stp in macro-assembler
Reviewed-by: duke

*** 148,162 ****
      strw(scratch, a);
    }
  
    void bind(Label& L) {
      Assembler::bind(L);
!     code()->clear_last_membar();
    }
  
    void membar(Membar_mask_bits order_constraint);
  
    // Frame creation and destruction shared between JITs.
    void build_frame(int framesize);
    void remove_frame(int framesize);
  
    virtual void _call_Unimplemented(address call_site) {
--- 148,170 ----
      strw(scratch, a);
    }
  
    void bind(Label& L) {
      Assembler::bind(L);
!     code()->clear_last_insn();
    }
  
    void membar(Membar_mask_bits order_constraint);
  
+   using Assembler::ldr;
+   using Assembler::str;
+ 
+   void ldr(Register Rx, const Address &adr);
+   void ldrw(Register Rw, const Address &adr);
+   void str(Register Rx, const Address &adr);
+   void strw(Register Rx, const Address &adr);
+ 
    // Frame creation and destruction shared between JITs.
    void build_frame(int framesize);
    void remove_frame(int framesize);
  
    virtual void _call_Unimplemented(address call_site) {
*** 1289,1298 ****
--- 1297,1317 ----
  private:
    // Returns an address on the stack which is reachable with a ldr/str of size
    // Uses rscratch2 if the address is not directly reachable
    Address spill_address(int size, int offset, Register tmp=rscratch2);
  
+   bool merge_alignment_check(Register base, size_t size, long cur_offset, long prev_offset) const;
+ 
+   // Check whether two loads/stores can be merged into ldp/stp.
+   bool ldst_can_merge(Register rx, const Address &adr, size_t cur_size_in_bytes, bool is_store) const;
+ 
+   // Merge current load/store with previous load/store into ldp/stp.
+   void merge_ldst(Register rx, const Address &adr, size_t cur_size_in_bytes, bool is_store);
+ 
+   // Try to merge two loads/stores into ldp/stp. If success, returns true else false.
+   bool try_merge_ldst(Register rt, const Address &adr, size_t cur_size_in_bytes, bool is_store);
+ 
  public:
    void spill(Register Rx, bool is64, int offset) {
      if (is64) {
        str(Rx, spill_address(8, offset));
      } else {