Cache common constants before lowering.

src/IceTargetLowering.h

 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 443 matching lines @@
   void assignVarStackSlots(VarList &SortedSpilledVariables,
                            size_t SpillAreaPaddingBytes,
                            size_t SpillAreaSizeBytes,
                            size_t GlobalsAndSubsequentPaddingSize,
                            bool UsesFramePointer);
 
   /// Sort the variables in Source based on required alignment. The variables
   /// with the largest alignment need are placed in the front of the Dest list.
   void sortVarsByAlignment(VarList &Dest, const VarList &Source) const;
 
-  /// Make a call to an external helper function.
-  InstCall *makeHelperCall(const IceString &Name, Variable *Dest,
+  InstCall *makeHelperCall(RuntimeHelperFuncID FuncID, Variable *Dest,
                            SizeT MaxSrcs);
 
   void _set_dest_redefined() { Context.getLastInserted()->setDestRedefined(); }
 
   bool shouldOptimizeMemIntrins();
 
   void scalarizeArithmetic(InstArithmetic::OpKind K, Variable *Dest,
                            Operand *Src0, Operand *Src1);
 
   /// Generalizes scalarizeArithmetic to support other instruction types.
@@ skipping 86 matching lines @@
 
   Cfg *Func;
   GlobalContext *Ctx;
   bool HasComputedFrame = false;
   bool CallsReturnsTwice = false;
   SizeT NextLabelNumber = 0;
   SizeT NextJumpTableNumber = 0;
   LoweringContext Context;
   const SandboxType SandboxingType = ST_None;
 
-  // Runtime helper function names
-  const static constexpr char *H_bitcast_16xi1_i16 = "__Sz_bitcast_16xi1_i16";
-  const static constexpr char *H_bitcast_8xi1_i8 = "__Sz_bitcast_8xi1_i8";
-  const static constexpr char *H_bitcast_i16_16xi1 = "__Sz_bitcast_i16_16xi1";
-  const static constexpr char *H_bitcast_i8_8xi1 = "__Sz_bitcast_i8_8xi1";
-  const static constexpr char *H_call_ctpop_i32 = "__popcountsi2";
-  const static constexpr char *H_call_ctpop_i64 = "__popcountdi2";
-  const static constexpr char *H_call_longjmp = "longjmp";
-  const static constexpr char *H_call_memcpy = "memcpy";
-  const static constexpr char *H_call_memmove = "memmove";
-  const static constexpr char *H_call_memset = "memset";
-  const static constexpr char *H_call_read_tp = "__nacl_read_tp";
-  const static constexpr char *H_call_setjmp = "setjmp";
-  const static constexpr char *H_fptosi_f32_i64 = "__Sz_fptosi_f32_i64";
-  const static constexpr char *H_fptosi_f64_i64 = "__Sz_fptosi_f64_i64";
-  const static constexpr char *H_fptoui_4xi32_f32 = "__Sz_fptoui_4xi32_f32";
-  const static constexpr char *H_fptoui_f32_i32 = "__Sz_fptoui_f32_i32";
-  const static constexpr char *H_fptoui_f32_i64 = "__Sz_fptoui_f32_i64";
-  const static constexpr char *H_fptoui_f64_i32 = "__Sz_fptoui_f64_i32";
-  const static constexpr char *H_fptoui_f64_i64 = "__Sz_fptoui_f64_i64";
-  const static constexpr char *H_frem_f32 = "fmodf";
-  const static constexpr char *H_frem_f64 = "fmod";
+  /// Returns the constant defining the corresponding runtime helper function.
+  Constant *getRuntimeHelperFunc(RuntimeHelperFuncID FuncID) const {
+    return Ctx->getRuntimeHelperFunc(FuncID);
+  }
+
   const static constexpr char *H_getIP_prefix = "__Sz_getIP_";
-  const static constexpr char *H_sdiv_i32 = "__divsi3";
-  const static constexpr char *H_sdiv_i64 = "__divdi3";
-  const static constexpr char *H_sitofp_i64_f32 = "__Sz_sitofp_i64_f32";
-  const static constexpr char *H_sitofp_i64_f64 = "__Sz_sitofp_i64_f64";
-  const static constexpr char *H_srem_i32 = "__modsi3";
-  const static constexpr char *H_srem_i64 = "__moddi3";
-  const static constexpr char *H_udiv_i32 = "__udivsi3";
-  const static constexpr char *H_udiv_i64 = "__udivdi3";
-  const static constexpr char *H_uitofp_4xi32_4xf32 = "__Sz_uitofp_4xi32_4xf32";
-  const static constexpr char *H_uitofp_i32_f32 = "__Sz_uitofp_i32_f32";
-  const static constexpr char *H_uitofp_i32_f64 = "__Sz_uitofp_i32_f64";
-  const static constexpr char *H_uitofp_i64_f32 = "__Sz_uitofp_i64_f32";
-  const static constexpr char *H_uitofp_i64_f64 = "__Sz_uitofp_i64_f64";
-  const static constexpr char *H_urem_i32 = "__umodsi3";
-  const static constexpr char *H_urem_i64 = "__umoddi3";
 };
 
 /// TargetDataLowering is used for "lowering" data including initializers for
 /// global variables, and the internal constant pools. It is separated out from
 /// TargetLowering because it does not require a Cfg.
 class TargetDataLowering {
   TargetDataLowering() = delete;
   TargetDataLowering(const TargetDataLowering &) = delete;
   TargetDataLowering &operator=(const TargetDataLowering &) = delete;
 
@@ skipping 35 matching lines @@
   virtual void lower() {}
 
 protected:
   explicit TargetHeaderLowering(GlobalContext *Ctx) : Ctx(Ctx) {}
   GlobalContext *Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERING_H