1 files changed, 18 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index 347776b2367..0fd2bd7815b 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -1454,12 +1454,24 @@ bool FastISel::selectIntrinsicCall(const IntrinsicInst *II) {
             TII.get(TargetOpcode::DBG_LABEL)).addMetadata(DI->getLabel());
     return true;
   }
-  case Intrinsic::objectsize:
-    llvm_unreachable("llvm.objectsize.* should have been lowered already");
-
-  case Intrinsic::is_constant:
-    llvm_unreachable("llvm.is.constant.* should have been lowered already");
-
+  case Intrinsic::objectsize: {
+    ConstantInt *CI = cast<ConstantInt>(II->getArgOperand(1));
+    unsigned long long Res = CI->isZero() ? -1ULL : 0;
+    Constant *ResCI = ConstantInt::get(II->getType(), Res);
+    unsigned ResultReg = getRegForValue(ResCI);
+    if (!ResultReg)
+      return false;
+    updateValueMap(II, ResultReg);
+    return true;
+  }
+  case Intrinsic::is_constant: {
+    Constant *ResCI = ConstantInt::get(II->getType(), 0);
+    unsigned ResultReg = getRegForValue(ResCI);
+    if (!ResultReg)
+      return false;
+    updateValueMap(II, ResultReg);
+    return true;
+  }
   case Intrinsic::launder_invariant_group:
   case Intrinsic::strip_invariant_group:
   case Intrinsic::expect: {