[CIR][Lowering] Add MLIR lowering support for CIR sin operations (#586)

This PR add cir.sin lowering to MLIR math dialect. In the future, I will
submit a PR to lowering cir.floor, cir.fabs and other operations to
MLIR.

---------

Co-authored-by: Gao Xiang <gaoxiang@gaoxiang>

clang/lib/CIR/Lowering/ThroughMLIR/LowerCIRToMLIR.cpp

@@ -32,6 +32,7 @@
 #include "mlir/IR/BuiltinTypes.h"
 #include "mlir/Pass/Pass.h"
 #include "mlir/Pass/PassManager.h"
+#include "mlir/Support/LogicalResult.h"
 #include "mlir/Target/LLVMIR/Dialect/Builtin/BuiltinToLLVMIRTranslation.h"
 #include "mlir/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.h"
 #include "mlir/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.h"
@@ -208,6 +209,18 @@ class CIRCosOpLowering : public mlir::OpConversionPattern<mlir::cir::CosOp> {
   }
 };
 
+class CIRSinOpLowering : public mlir::OpConversionPattern<mlir::cir::SinOp> {
+public:
+  using mlir::OpConversionPattern<mlir::cir::SinOp>::OpConversionPattern;
+
+  mlir::LogicalResult
+  matchAndRewrite(mlir::cir::SinOp op, OpAdaptor adaptor,
+                  mlir::ConversionPatternRewriter &rewriter) const override {
+    rewriter.replaceOpWithNewOp<mlir::math::SinOp>(op, adaptor.getSrc());
+    return mlir::LogicalResult::success();
+  }
+};
+
 class CIRConstantOpLowering
     : public mlir::OpConversionPattern<mlir::cir::ConstantOp> {
 public:
@@ -987,14 +1000,14 @@ void populateCIRToMLIRConversionPatterns(mlir::RewritePatternSet &patterns,
                                          mlir::TypeConverter &converter) {
   patterns.add<CIRReturnLowering, CIRBrOpLowering>(patterns.getContext());
 
-  patterns
-      .add<CIRCmpOpLowering, CIRCallOpLowering, CIRUnaryOpLowering,
-           CIRBinOpLowering, CIRLoadOpLowering, CIRConstantOpLowering,
-           CIRStoreOpLowering, CIRAllocaOpLowering, CIRFuncOpLowering,
-           CIRScopeOpLowering, CIRBrCondOpLowering, CIRTernaryOpLowering,
-           CIRYieldOpLowering, CIRCosOpLowering, CIRGlobalOpLowering,
-           CIRGetGlobalOpLowering, CIRCastOpLowering, CIRPtrStrideOpLowering>(
-          converter, patterns.getContext());
+  patterns.add<CIRCmpOpLowering, CIRCallOpLowering, CIRUnaryOpLowering,
+               CIRBinOpLowering, CIRLoadOpLowering, CIRConstantOpLowering,
+               CIRStoreOpLowering, CIRAllocaOpLowering, CIRFuncOpLowering,
+               CIRScopeOpLowering, CIRBrCondOpLowering, CIRTernaryOpLowering,
+               CIRYieldOpLowering, CIRCosOpLowering, CIRGlobalOpLowering,
+               CIRGetGlobalOpLowering, CIRCastOpLowering,
+               CIRPtrStrideOpLowering, CIRSinOpLowering>(converter,
+                                                         patterns.getContext());
 }
 
 static mlir::TypeConverter prepareTypeConverter() {

clang/test/CIR/Lowering/ThroughMLIR/sin.cir

@@ -0,0 +1,30 @@
+// RUN: cir-opt %s -cir-to-mlir -o %t.mlir
+// RUN: FileCheck %s --input-file %t.mlir
+
+module {
+  cir.func @foo() {
+    %1 = cir.const #cir.fp<1.0> : !cir.float
+    %2 = cir.const #cir.fp<1.0> : !cir.double
+    %3 = cir.const #cir.fp<1.0> : !cir.long_double<!cir.f80>
+    %4 = cir.const #cir.fp<1.0> : !cir.long_double<!cir.double>
+    %5 = cir.sin %1 : !cir.float
+    %6 = cir.sin %2 : !cir.double
+    %7 = cir.sin %3 : !cir.long_double<!cir.f80>
+    %8 = cir.sin %4 : !cir.long_double<!cir.double>
+    cir.return
+  }
+}
+
+// CHECK:      module {
+// CHECK-NEXT:   func.func @foo() {
+// CHECK-NEXT:     %[[C0:.+]] = arith.constant 1.000000e+00 : f32
+// CHECK-NEXT:     %[[C1:.+]] = arith.constant 1.000000e+00 : f64
+// CHECK-NEXT:     %[[C2:.+]] = arith.constant 1.000000e+00 : f80
+// CHECK-NEXT:     %[[C3:.+]] = arith.constant 1.000000e+00 : f64
+// CHECK-NEXT:     %{{.+}} = math.sin %[[C0]] : f32
+// CHECK-NEXT:     %{{.+}} = math.sin %[[C1]] : f64
+// CHECK-NEXT:     %{{.+}} = math.sin %[[C2]] : f80
+// CHECK-NEXT:     %{{.+}} = math.sin %[[C3]] : f64
+// CHECK-NEXT:     return
+// CHECK-NEXT:   }
+// CHECK-NEXT: }