Subzero: lower the rest of the atomic operations.

src/IceTargetLoweringX8632.h

 //===- subzero/src/IceTargetLoweringX8632.h - x86-32 lowering ---*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the TargetLoweringX8632 class, which
@@ skipping 77 matching lines @@
   virtual void lowerLoad(const InstLoad *Inst);
   virtual void lowerPhi(const InstPhi *Inst);
   virtual void lowerRet(const InstRet *Inst);
   virtual void lowerSelect(const InstSelect *Inst);
   virtual void lowerStore(const InstStore *Inst);
   virtual void lowerSwitch(const InstSwitch *Inst);
   virtual void lowerUnreachable(const InstUnreachable *Inst);
   virtual void doAddressOptLoad();
   virtual void doAddressOptStore();
 
+  void lowerAtomicCmpxchg(Variable *DestPrev, Operand *Ptr, Operand *Expected,
+                          Operand *Desired);
   void lowerAtomicRMW(Variable *Dest, uint32_t Operation, Operand *Ptr,
                       Operand *Val);
 
+  typedef void (TargetX8632::*LowerBinOp)(Variable *, Operand *);
+  void expandAtomicRMWAsCmpxchg(LowerBinOp op_lo, LowerBinOp op_hi,
+                                Variable *Dest, Operand *Ptr, Operand *Val);
+
   // Operand legalization helpers.  To deal with address mode
   // constraints, the helpers will create a new Operand and emit
   // instructions that guarantee that the Operand kind is one of those
   // indicated by the LegalMask (a bitmask of allowed kinds).  If the
   // input Operand is known to already meet the constraints, it may be
   // simply returned as the result, without creating any new
   // instructions or operands.
   enum OperandLegalization {
     Legal_None = 0,
     Legal_Reg = 1 << 0, // physical register, not stack location
@@ skipping 56 matching lines @@
   }
   void _br(InstX8632Br::BrCond Condition, InstX8632Label *Label) {
     Context.insert(InstX8632Br::create(Func, Label, Condition));
   }
   void _cdq(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Cdq::create(Func, Dest, Src0));
   }
   void _cmp(Operand *Src0, Operand *Src1) {
     Context.insert(InstX8632Icmp::create(Func, Src0, Src1));
   }
+  void _cmpxchg(Operand *DestOrAddr, Variable *Eax, Variable *Desired,
+                bool Locked) {
+    Context.insert(
+        InstX8632Cmpxchg::create(Func, DestOrAddr, Eax, Desired, Locked));
+    // Mark eax as possibly modified by cmpxchg.
+    Context.insert(
+        InstFakeDef::create(Func, Eax, llvm::dyn_cast<Variable>(DestOrAddr)));
+  }
+  void _cmpxchg8b(OperandX8632 *Addr, Variable *Edx, Variable *Eax,
+                  Variable *Ecx, Variable *Ebx, bool Locked) {
+    Context.insert(
+        InstX8632Cmpxchg8b::create(Func, Addr, Edx, Eax, Ecx, Ebx, Locked));
+    // Mark edx, and eax as possibly modified by cmpxchg8b.
+    Context.insert(InstFakeDef::create(Func, Edx));
+    Context.insert(InstFakeDef::create(Func, Eax));
+  }
   void _cvt(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Cvt::create(Func, Dest, Src0));
   }
   void _div(Variable *Dest, Operand *Src0, Operand *Src1) {
     Context.insert(InstX8632Div::create(Func, Dest, Src0, Src1));
   }
   void _divss(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Divss::create(Func, Dest, Src0));
   }
   void _fld(Operand *Src0) { Context.insert(InstX8632Fld::create(Func, Src0)); }
@@ skipping 29 matching lines @@
   }
   void _movzx(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Movzx::create(Func, Dest, Src0));
   }
   void _mul(Variable *Dest, Variable *Src0, Operand *Src1) {
     Context.insert(InstX8632Mul::create(Func, Dest, Src0, Src1));
   }
   void _mulss(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Mulss::create(Func, Dest, Src0));
   }
+  void _neg(Variable *SrcDest) {
+    Context.insert(InstX8632Neg::create(Func, SrcDest));
+  }
   void _or(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Or::create(Func, Dest, Src0));
   }
   void _pop(Variable *Dest) {
     Context.insert(InstX8632Pop::create(Func, Dest));
   }
   void _push(Operand *Src0, bool SuppressStackAdjustment = false) {
     Context.insert(InstX8632Push::create(Func, Src0, SuppressStackAdjustment));
   }
   void _ret(Variable *Src0 = NULL) {
@@ skipping 36 matching lines @@
     Context.insert(InstX8632Test::create(Func, Src0, Src1));
   }
   void _ucomiss(Operand *Src0, Operand *Src1) {
     Context.insert(InstX8632Ucomiss::create(Func, Src0, Src1));
   }
   void _ud2() { Context.insert(InstX8632UD2::create(Func)); }
   void _xadd(Operand *Dest, Variable *Src, bool Locked) {
     Context.insert(InstX8632Xadd::create(Func, Dest, Src, Locked));
     // The xadd exchanges Dest and Src (modifying Src).
     // Model that update with a FakeDef.
-    Context.insert(InstFakeDef::create(Func, Src));
+    Context.insert(
+        InstFakeDef::create(Func, Src, llvm::dyn_cast<Variable>(Dest)));
+  }
+  void _xchg(Operand *Dest, Variable *Src) {
+    Context.insert(InstX8632Xchg::create(Func, Dest, Src));
+    // The xchg modifies Dest and Src -- model that update with a FakeDef.
+    Context.insert(
+        InstFakeDef::create(Func, Src, llvm::dyn_cast<Variable>(Dest)));
   }
   void _xor(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Xor::create(Func, Dest, Src0));
   }
   void _pxor(Variable *Dest, Operand *Src0) {
     Context.insert(InstX8632Pxor::create(Func, Dest, Src0));
   }
 
   bool IsEbpBasedFrame;
   size_t FrameSizeLocals;
@@ skipping 32 matching lines @@
   virtual ~TargetGlobalInitX8632() {}
 };
 
 template <> void ConstantInteger::emit(GlobalContext *Ctx) const;
 template <> void ConstantFloat::emit(GlobalContext *Ctx) const;
 template <> void ConstantDouble::emit(GlobalContext *Ctx) const;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8632_H