[CIR] Upstream ComplexType ImaginaryLiteral (#144223)

This change adds support for ComplexType ImaginaryLiteral

#141365

Author: AmrDeveloper

clang/lib/CIR/CodeGen/CIRGenExprComplex.cpp

@@ -21,6 +21,8 @@ class ComplexExprEmitter : public StmtVisitor<ComplexExprEmitter, mlir::Value> {
                           bool isInit);
 
   mlir::Value VisitInitListExpr(InitListExpr *e);
+
+  mlir::Value VisitImaginaryLiteral(const ImaginaryLiteral *il);
 };
 
 } // namespace
@@ -66,6 +68,34 @@ mlir::Value ComplexExprEmitter::VisitInitListExpr(InitListExpr *e) {
   return builder.create<cir::ConstantOp>(loc, complexAttr);
 }
 
+mlir::Value
+ComplexExprEmitter::VisitImaginaryLiteral(const ImaginaryLiteral *il) {
+  auto ty = mlir::cast<cir::ComplexType>(cgf.convertType(il->getType()));
+  mlir::Type elementTy = ty.getElementType();
+  mlir::Location loc = cgf.getLoc(il->getExprLoc());
+
+  mlir::TypedAttr realValueAttr;
+  mlir::TypedAttr imagValueAttr;
+
+  if (mlir::isa<cir::IntType>(elementTy)) {
+    llvm::APInt imagValue = cast<IntegerLiteral>(il->getSubExpr())->getValue();
+    realValueAttr = cir::IntAttr::get(elementTy, 0);
+    imagValueAttr = cir::IntAttr::get(elementTy, imagValue);
+  } else {
+    assert(mlir::isa<cir::CIRFPTypeInterface>(elementTy) &&
+           "Expected complex element type to be floating-point");
+
+    llvm::APFloat imagValue =
+        cast<FloatingLiteral>(il->getSubExpr())->getValue();
+    realValueAttr = cir::FPAttr::get(
+        elementTy, llvm::APFloat::getZero(imagValue.getSemantics()));
+    imagValueAttr = cir::FPAttr::get(elementTy, imagValue);
+  }
+
+  auto complexAttr = cir::ConstComplexAttr::get(realValueAttr, imagValueAttr);
+  return builder.create<cir::ConstantOp>(loc, complexAttr);
+}
+
 mlir::Value CIRGenFunction::emitComplexExpr(const Expr *e) {
   assert(e && getComplexType(e->getType()) &&
          "Invalid complex expression to emit");

clang/test/CIR/CodeGen/complex.cpp

@@ -176,3 +176,32 @@ void foo7() {
 // OGCG: store float %[[TMP_A]], ptr %[[C_REAL_PTR]], align 4
 // OGCG: store float 2.000000e+00, ptr %[[C_IMAG_PTR]], align 4
 
+void foo8() {
+  double _Complex c = 2.00i;
+}
+
+// CIR: %[[COMPLEX:.*]] = cir.const #cir.const_complex<#cir.fp<0.000000e+00> : !cir.double, #cir.fp<2.000000e+00> : !cir.double> : !cir.complex<!cir.double>
+
+// LLVM: %[[COMPLEX:.*]] = alloca { double, double }, i64 1, align 8
+// LLVM: store { double, double } { double 0.000000e+00, double 2.000000e+00 }, ptr %[[COMPLEX]], align 8
+
+// OGCG: %[[COMPLEX:.*]] = alloca { double, double }, align 8
+// OGCG: %[[C_REAL_PTR:.*]] = getelementptr inbounds nuw { double, double }, ptr %[[COMPLEX]], i32 0, i32 0
+// OGCG: %[[C_IMAG_PTR:.*]] = getelementptr inbounds nuw { double, double }, ptr %[[COMPLEX]], i32 0, i32 1
+// OGCG: store double 0.000000e+00, ptr %[[C_REAL_PTR]], align 8
+// OGCG: store double 2.000000e+00, ptr %[[C_IMAG_PTR]], align 8
+
+void foo14() {
+  int _Complex c = 2i;
+}
+
+// CIR: %[[COMPLEX:.*]] = cir.const #cir.const_complex<#cir.int<0> : !s32i, #cir.int<2> : !s32i> : !cir.complex<!s32i>
+
+// LLVM: %[[COMPLEX:.*]] = alloca { i32, i32 }, i64 1, align 4
+// LLVM: store { i32, i32 } { i32 0, i32 2 }, ptr %[[COMPLEX]], align 4
+
+// OGCG: %[[COMPLEX:.*]] = alloca { i32, i32 }, align 4
+// OGCG: %[[C_REAL_PTR:.*]] = getelementptr inbounds nuw { i32, i32 }, ptr %[[COMPLEX]], i32 0, i32 0
+// OGCG: %[[C_IMAG_PTR:.*]] = getelementptr inbounds nuw { i32, i32 }, ptr %[[COMPLEX]], i32 0, i32 1
+// OGCG: store i32 0, ptr %[[C_REAL_PTR]], align 4
+// OGCG: store i32 2, ptr %[[C_IMAG_PTR]], align 4