[llvm] [SandboxIR] Implement CmpInst, FCmpInst, and ICmpInst (PR #106301)

[via llvm-commits]

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@@ -3108,6 +3120,157 @@ class PHINode final : public SingleLLVMInstructionImpl<llvm::PHINode> {
   //                         uint32_t ToIdx = 0)
 };
 
+// Wraps a static function that takes a single Predicate parameter
+// LLVMValType should be the type of the wrapped class
+#define WRAP_STATIC_PREDICATE(FunctionName)                                    \
+  static auto FunctionName(Predicate P) { return LLVMValType::FunctionName(P); }
+// Wraps a member function that takes no parameters
+// LLVMValType should be the type of the wrapped class
+#define WRAP_MEMBER(FunctionName)                                              \
+  auto FunctionName() const { return cast<LLVMValType>(Val)->FunctionName(); }
+// Wraps both--a common idiom in the CmpInst classes
+#define WRAP_BOTH(FunctionName)                                                \
+  WRAP_STATIC_PREDICATE(FunctionName)                                          \
+  WRAP_MEMBER(FunctionName)
+
+class CmpInst : public SingleLLVMInstructionImpl<llvm::CmpInst> {
+protected:
+  using LLVMValType = llvm::CmpInst;
+  /// Use Context::createCmpInst(). Don't call the constructor directly.
+  CmpInst(llvm::CmpInst *CI, Context &Ctx, ClassID Id, Opcode Opc)
+      : SingleLLVMInstructionImpl(Id, Opc, CI, Ctx) {}
+  friend Context; // for CmpInst()
+  static Value *createCommon(Value *Cond, Value *True, Value *False,
+                             const Twine &Name, IRBuilder<> &Builder,
+                             Context &Ctx);
+
+public:
+  using Predicate = llvm::CmpInst::Predicate;
+
+  static CmpInst *create(Predicate Pred, Value *S1, Value *S2,
+                         Instruction *InsertBefore, Context &Ctx,
+                         const Twine &Name = "");
+  static CmpInst *createWithCopiedFlags(Predicate Pred, Value *S1, Value *S2,
+                                        const Instruction *FlagsSource,
+                                        Instruction *InsertBefore, Context &Ctx,
+                                        const Twine &Name = "");
+  void setPredicate(Predicate P);
+  void swapOperands();
+
+  WRAP_MEMBER(getPredicate);
+  WRAP_BOTH(isFPPredicate);
+  WRAP_BOTH(isIntPredicate);
+  WRAP_STATIC_PREDICATE(getPredicateName);
+  WRAP_BOTH(getInversePredicate);
+  WRAP_BOTH(getOrderedPredicate);
+  WRAP_BOTH(getUnorderedPredicate);
+  WRAP_BOTH(getSwappedPredicate);
+  WRAP_BOTH(isStrictPredicate);
+  WRAP_BOTH(isNonStrictPredicate);
+  WRAP_BOTH(getStrictPredicate);
+  WRAP_BOTH(getNonStrictPredicate);
+  WRAP_BOTH(getFlippedStrictnessPredicate);
+  WRAP_MEMBER(isCommutative);
+  WRAP_BOTH(isEquality);
+  WRAP_BOTH(isRelational);
+  WRAP_BOTH(isSigned);
+  WRAP_BOTH(getSignedPredicate);
+  WRAP_BOTH(getUnsignedPredicate);
+  WRAP_BOTH(getFlippedSignednessPredicate);
+  WRAP_BOTH(isTrueWhenEqual);
+  WRAP_BOTH(isFalseWhenEqual);
+  WRAP_BOTH(isUnsigned);
+  WRAP_STATIC_PREDICATE(isOrdered);
+  WRAP_STATIC_PREDICATE(isUnordered);
+
+  static bool isImpliedTrueByMatchingCmp(Predicate Pred1, Predicate Pred2) {
+    return llvm::CmpInst::isImpliedTrueByMatchingCmp(Pred1, Pred2);
+  }
+  static bool isImpliedFalseByMatchingCmp(Predicate Pred1, Predicate Pred2) {
+    return llvm::CmpInst::isImpliedFalseByMatchingCmp(Pred1, Pred2);
+  }
+
+  /// Method for support type inquiry through isa, cast, and dyn_cast:
+  static bool classof(const Value *From) {
+    return From->getSubclassID() == ClassID::ICmp ||
+           From->getSubclassID() == ClassID::FCmp;
+  }
+
+  /// Create a result type for fcmp/icmp
+  static Type *makeCmpResultType(Type *OpndType) {
+    if (VectorType *vt = dyn_cast<VectorType>(OpndType)) {
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vporpo wrote:

nit: `vt`->`VT` 

https://github.com/llvm/llvm-project/pull/106301