[Clang][CodeGen] Fix test failures.

Author: dtcxzyw

clang/lib/CodeGen/CGExpr.cpp

@@ -4990,7 +4990,7 @@ LValue CodeGenFunction::EmitLValueForField(LValue base, const FieldDecl *field,
           (!getDebugInfo() || !rec->hasAttr<BPFPreserveAccessIndexAttr>())) {
         if (Idx != 0) {
           // For structs, we GEP to the field that the record layout suggests.
-          if (getLangOpts().PointerOverflowDefined)
+          if (!IsInBounds)
             Addr = Builder.CreateConstGEP2_32(Addr, 0, Idx, field->getName());
           else
             Addr = Builder.CreateStructGEP(Addr, Idx, field->getName());

clang/lib/CodeGen/CodeGenFunction.h

@@ -4460,7 +4460,7 @@ class CodeGenFunction : public CodeGenTypeCache {
   llvm::Value *EmitIvarOffsetAsPointerDiff(const ObjCInterfaceDecl *Interface,
                                            const ObjCIvarDecl *Ivar);
   LValue EmitLValueForField(LValue Base, const FieldDecl *Field,
-                            bool IsInBounds = false);
+                            bool IsInBounds = true);
   LValue EmitLValueForLambdaField(const FieldDecl *Field);
   LValue EmitLValueForLambdaField(const FieldDecl *Field,
                                   llvm::Value *ThisValue);