Revert "Revert "Revert "Use trampolines for calls to helpers"""

This reverts commit f9487c039efb4112616d438593a2ab02792e0304.

Change-Id: Id48a4aae4ecce73db468587967968a3f7618b700
diff --git a/compiler/dex/quick/mir_to_lir.h b/compiler/dex/quick/mir_to_lir.h
index 5d8a6af..6dbeb34 100644
--- a/compiler/dex/quick/mir_to_lir.h
+++ b/compiler/dex/quick/mir_to_lir.h
@@ -328,18 +328,6 @@
       LIR* const cont_;
     };
 
-    // This holds the data for a call to a trampoline.  An instruction is making a call
-    // to something through a trampoline and this holds the offset into the code containing
-    // the instruction, and which trampoline offset to call.
-    struct TrampolineCall {
-      TrampolineCall(uint32_t code_offset, uint32_t trampoline_offset) : code_offset_(code_offset),
-         trampoline_offset_(trampoline_offset) {
-      }
-
-      uint32_t code_offset_;          // Offset of instruction in method code stream (bytes).
-      uint32_t trampoline_offset_;    // Which trampoline to call.
-    };
-
     virtual ~Mir2Lir() {}
 
     int32_t s4FromSwitchData(const void* switch_data) {
@@ -627,11 +615,11 @@
     virtual void GenConstWide(RegLocation rl_dest, int64_t value);
     virtual void GenArithOpInt(Instruction::Code opcode, RegLocation rl_dest,
                        RegLocation rl_src1, RegLocation rl_src2);
-    virtual LIR* CallHelper(RegStorage r_tgt, ThreadOffset<4> helper_offset, bool safepoint_pc,
-                    bool use_link = true);
-    virtual RegStorage CallHelperSetup(ThreadOffset<4> helper_offset);
 
     // Shared by all targets - implemented in gen_invoke.cc.
+    LIR* CallHelper(RegStorage r_tgt, ThreadOffset<4> helper_offset, bool safepoint_pc,
+                    bool use_link = true);
+    RegStorage CallHelperSetup(ThreadOffset<4> helper_offset);
     void CallRuntimeHelper(ThreadOffset<4> helper_offset, bool safepoint_pc);
     void CallRuntimeHelperImm(ThreadOffset<4> helper_offset, int arg0, bool safepoint_pc);
     void CallRuntimeHelperReg(ThreadOffset<4> helper_offset, RegStorage arg0, bool safepoint_pc);
@@ -1292,7 +1280,6 @@
     LIR* last_lir_insn_;
 
     GrowableArray<LIRSlowPath*> slow_paths_;
-    std::vector<TrampolineCall> trampoline_calls_;
 };  // Class Mir2Lir
 
 }  // namespace art