1 files changed, 22 insertions, 0 deletions
diff --git a/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp b/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp
index 5d3496a..7edd83e 100644
--- a/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp
@@ -1893,6 +1893,28 @@ mlir::Value ScalarExprEmitter::VisitCastExpr(CastExpr *ce) {
     }
     return v;
   }
+  case CK_IntegralToPointer: {
+    mlir::Type destCIRTy = cgf.convertType(destTy);
+    mlir::Value src = Visit(const_cast<Expr *>(subExpr));
+
+    // Properly resize by casting to an int of the same size as the pointer.
+    // Clang's IntegralToPointer includes 'bool' as the source, but in CIR
+    // 'bool' is not an integral type.  So check the source type to get the
+    // correct CIR conversion.
+    mlir::Type middleTy = cgf.cgm.getDataLayout().getIntPtrType(destCIRTy);
+    mlir::Value middleVal = builder.createCast(
+        subExpr->getType()->isBooleanType() ? cir::CastKind::bool_to_int
+                                            : cir::CastKind::integral,
+        src, middleTy);
+
+    if (cgf.cgm.getCodeGenOpts().StrictVTablePointers) {
+      cgf.cgm.errorNYI(subExpr->getSourceRange(),
+                       "IntegralToPointer: strict vtable pointers");
+      return {};
+    }
+
+    return builder.createIntToPtr(middleVal, destCIRTy);
+  }
 
   case CK_ArrayToPointerDecay:
     return cgf.emitArrayToPointerDecay(subExpr).getPointer();