[CIR] Simplify error emission to return failures directly (#141032)

Mirrors incubator changes from llvm/clangir#1634

Author: xlauko

clang/lib/CIR/Dialect/IR/CIRAttrs.cpp

@@ -138,17 +138,13 @@ void IntAttr::print(AsmPrinter &printer) const {
 
 LogicalResult IntAttr::verify(function_ref<InFlightDiagnostic()> emitError,
                               Type type, APInt value) {
-  if (!mlir::isa<IntType>(type)) {
-    emitError() << "expected 'simple.int' type";
-    return failure();
-  }
+  if (!mlir::isa<IntType>(type))
+    return emitError() << "expected 'simple.int' type";
 
   auto intType = mlir::cast<IntType>(type);
-  if (value.getBitWidth() != intType.getWidth()) {
-    emitError() << "type and value bitwidth mismatch: " << intType.getWidth()
-                << " != " << value.getBitWidth();
-    return failure();
-  }
+  if (value.getBitWidth() != intType.getWidth())
+    return emitError() << "type and value bitwidth mismatch: "
+                       << intType.getWidth() << " != " << value.getBitWidth();
 
   return success();
 }
@@ -182,10 +178,8 @@ FPAttr FPAttr::getZero(Type type) {
 LogicalResult FPAttr::verify(function_ref<InFlightDiagnostic()> emitError,
                              CIRFPTypeInterface fpType, APFloat value) {
   if (APFloat::SemanticsToEnum(fpType.getFloatSemantics()) !=
-      APFloat::SemanticsToEnum(value.getSemantics())) {
-    emitError() << "floating-point semantics mismatch";
-    return failure();
-  }
+      APFloat::SemanticsToEnum(value.getSemantics()))
+    return emitError() << "floating-point semantics mismatch";
 
   return success();
 }
@@ -195,22 +189,21 @@ LogicalResult FPAttr::verify(function_ref<InFlightDiagnostic()> emitError,
 //===----------------------------------------------------------------------===//
 
 LogicalResult
-ConstArrayAttr::verify(function_ref<::mlir::InFlightDiagnostic()> emitError,
-                       Type type, Attribute elts, int trailingZerosNum) {
+ConstArrayAttr::verify(function_ref<InFlightDiagnostic()> emitError, Type type,
+                       Attribute elts, int trailingZerosNum) {
 
-  if (!(mlir::isa<ArrayAttr>(elts) || mlir::isa<StringAttr>(elts)))
+  if (!(mlir::isa<ArrayAttr, StringAttr>(elts)))
     return emitError() << "constant array expects ArrayAttr or StringAttr";
 
   if (auto strAttr = mlir::dyn_cast<StringAttr>(elts)) {
     const auto arrayTy = mlir::cast<ArrayType>(type);
     const auto intTy = mlir::dyn_cast<IntType>(arrayTy.getElementType());
 
     // TODO: add CIR type for char.
-    if (!intTy || intTy.getWidth() != 8) {
-      emitError() << "constant array element for string literals expects "
-                     "!cir.int<u, 8> element type";
-      return failure();
-    }
+    if (!intTy || intTy.getWidth() != 8)
+      return emitError()
+             << "constant array element for string literals expects "
+                "!cir.int<u, 8> element type";
     return success();
   }
 
@@ -303,22 +296,20 @@ void ConstArrayAttr::print(AsmPrinter &printer) const {
 // CIR ConstVectorAttr
 //===----------------------------------------------------------------------===//
 
-LogicalResult cir::ConstVectorAttr::verify(
-    function_ref<::mlir::InFlightDiagnostic()> emitError, Type type,
-    ArrayAttr elts) {
+LogicalResult
+cir::ConstVectorAttr::verify(function_ref<InFlightDiagnostic()> emitError,
+                             Type type, ArrayAttr elts) {
 
-  if (!mlir::isa<cir::VectorType>(type)) {
+  if (!mlir::isa<cir::VectorType>(type))
     return emitError() << "type of cir::ConstVectorAttr is not a "
                           "cir::VectorType: "
                        << type;
-  }
 
   const auto vecType = mlir::cast<cir::VectorType>(type);
 
-  if (vecType.getSize() != elts.size()) {
+  if (vecType.getSize() != elts.size())
     return emitError()
            << "number of constant elements should match vector size";
-  }
 
   // Check if the types of the elements match
   LogicalResult elementTypeCheck = success();

clang/lib/CIR/Dialect/IR/CIRTypes.cpp

@@ -205,10 +205,8 @@ RecordType::verify(function_ref<mlir::InFlightDiagnostic()> emitError,
                    llvm::ArrayRef<mlir::Type> members, mlir::StringAttr name,
                    bool incomplete, bool packed, bool padded,
                    RecordType::RecordKind kind) {
-  if (name && name.getValue().empty()) {
-    emitError() << "identified records cannot have an empty name";
-    return mlir::failure();
-  }
+  if (name && name.getValue().empty())
+    return emitError() << "identified records cannot have an empty name";
   return mlir::success();
 }
 
@@ -421,12 +419,10 @@ uint64_t IntType::getABIAlignment(const mlir::DataLayout &dataLayout,
 mlir::LogicalResult
 IntType::verify(llvm::function_ref<mlir::InFlightDiagnostic()> emitError,
                 unsigned width, bool isSigned) {
-  if (width < IntType::minBitwidth() || width > IntType::maxBitwidth()) {
-    emitError() << "IntType only supports widths from "
-                << IntType::minBitwidth() << " up to "
-                << IntType::maxBitwidth();
-    return mlir::failure();
-  }
+  if (width < IntType::minBitwidth() || width > IntType::maxBitwidth())
+    return emitError() << "IntType only supports widths from "
+                       << IntType::minBitwidth() << " up to "
+                       << IntType::maxBitwidth();
   return mlir::success();
 }
 
@@ -631,10 +627,9 @@ mlir::LogicalResult
 FuncType::verify(llvm::function_ref<mlir::InFlightDiagnostic()> emitError,
                  llvm::ArrayRef<mlir::Type> argTypes, mlir::Type returnType,
                  bool isVarArg) {
-  if (returnType && mlir::isa<cir::VoidType>(returnType)) {
-    emitError() << "!cir.func cannot have an explicit 'void' return type";
-    return mlir::failure();
-  }
+  if (mlir::isa_and_nonnull<cir::VoidType>(returnType))
+    return emitError()
+           << "!cir.func cannot have an explicit 'void' return type";
   return mlir::success();
 }