SubZero: legalize for f32/f64 constants in MIPS32

src/IceTargetLoweringMIPS32.h

 //===- subzero/src/IceTargetLoweringMIPS32.h - MIPS32 lowering ---*- C++-*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 17 matching lines @@
 class TargetMIPS32 : public TargetLowering {
   TargetMIPS32() = delete;
   TargetMIPS32(const TargetMIPS32 &) = delete;
   TargetMIPS32 &operator=(const TargetMIPS32 &) = delete;
 
 public:
   ~TargetMIPS32() override = default;
 
   static void staticInit(GlobalContext *Ctx);
   static bool shouldBePooled(const Constant *C) {
-    (void)C;
+    if (auto *ConstDouble = llvm::dyn_cast<ConstantDouble>(C)) {
+      return !Utils::isPositiveZero(ConstDouble->getValue());
+    }
+    if (llvm::isa<ConstantFloat>(C))
+      return true;
     return false;
   }
   static std::unique_ptr<::Ice::TargetLowering> create(Cfg *Func) {
     return makeUnique<TargetMIPS32>(Func);
   }
 
   std::unique_ptr<::Ice::Assembler> createAssembler() const override {
     return makeUnique<MIPS32::AssemblerMIPS32>();
   }
 
@@ skipping 174 matching lines @@
   }
 
   void _div_s(Variable *Dest, Variable *Src0, Variable *Src1) {
     Context.insert<InstMIPS32Div_s>(Dest, Src0, Src1);
   }
 
   void _divu(Variable *Dest, Variable *Src0, Variable *Src1) {
     Context.insert<InstMIPS32Divu>(Dest, Src0, Src1);
   }
 
-  void _ldc1(Variable *Value, OperandMIPS32Mem *Mem) {
-    Context.insert<InstMIPS32Ldc1>(Value, Mem);
+  void _ldc1(Variable *Value, OperandMIPS32Mem *Mem, RelocOp Reloc = RO_No) {
+    Context.insert<InstMIPS32Ldc1>(Value, Mem, Reloc);
   }
 
   void _lw(Variable *Value, OperandMIPS32Mem *Mem) {
     Context.insert<InstMIPS32Lw>(Value, Mem);
   }
 
-  void _lwc1(Variable *Value, OperandMIPS32Mem *Mem) {
-    Context.insert<InstMIPS32Lwc1>(Value, Mem);
+  void _lwc1(Variable *Value, OperandMIPS32Mem *Mem, RelocOp Reloc = RO_No) {
+    Context.insert<InstMIPS32Lwc1>(Value, Mem, Reloc);
   }
 
-  void _lui(Variable *Dest, uint32_t Imm) {
-    Context.insert<InstMIPS32Lui>(Dest, Imm);
+  void _lui(Variable *Dest, Operand *Src, RelocOp Reloc = RO_No) {
+    Context.insert<InstMIPS32Lui>(Dest, Src, Reloc);
   }
 
   void _mov(Variable *Dest, Operand *Src0) {
     assert(Dest != nullptr);
     // Variable* Src0_ = llvm::dyn_cast<Variable>(Src0);
     if (llvm::isa<ConstantRelocatable>(Src0)) {
       Context.insert<InstMIPS32La>(Dest, Src0);
     } else {
       auto *Instr = Context.insert<InstMIPS32Mov>(Dest, Src0);
       if (Instr->isMultiDest()) {
@@ skipping 420 matching lines @@
   explicit TargetHeaderMIPS32(GlobalContext *Ctx);
 
 private:
   ~TargetHeaderMIPS32() = default;
 };
 
 } // end of namespace MIPS32
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGMIPS32_H