diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -10700,8 +10700,8 @@
     llvm::Type *Field2Ty = nullptr;
     CharUnits Field1Off = CharUnits::Zero();
     CharUnits Field2Off = CharUnits::Zero();
-    int NeededArgGPRs;
-    int NeededArgFPRs;
+    int NeededArgGPRs = 0;
+    int NeededArgFPRs = 0;
     bool IsCandidate =
         detectFPCCEligibleStruct(Ty, Field1Ty, Field1Off, Field2Ty, Field2Off,
                                  NeededArgGPRs, NeededArgFPRs);