[PATCH] D78284: [AST] Fix an undefine behavior when creating an empty recovery expr.

[Haojian Wu via Phabricator via cfe-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG94d6dd01ba43: [AST] Fix an undefine behavior when creating an empty recovery expr. (authored by hokein).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D78284/new/

https://reviews.llvm.org/D78284

Files:
  clang/include/clang/AST/Expr.h
  clang/lib/AST/Expr.cpp
  clang/test/PCH/cxx-recovery-expr.cpp


Index: clang/test/PCH/cxx-recovery-expr.cpp
===================================================================
--- /dev/null
+++ clang/test/PCH/cxx-recovery-expr.cpp
@@ -0,0 +1,13 @@
+// Test with pch.
+// RUN: %clang_cc1 -emit-pch -frecovery-ast -fallow-pch-with-compiler-errors -o %t %s
+// RUN: %clang_cc1 -include-pch %t -fno-validate-pch -emit-llvm -o - %s
+
+#ifndef HEADER
+#define HEADER
+
+int func(int);
+int s = func();
+
+#else
+
+#endif
Index: clang/lib/AST/Expr.cpp
===================================================================
--- clang/lib/AST/Expr.cpp
+++ clang/lib/AST/Expr.cpp
@@ -4652,7 +4652,7 @@
 RecoveryExpr *RecoveryExpr::CreateEmpty(ASTContext &Ctx, unsigned NumSubExprs) {
   void *Mem = Ctx.Allocate(totalSizeToAlloc<Expr *>(NumSubExprs),
                            alignof(RecoveryExpr));
-  return new (Mem) RecoveryExpr(EmptyShell());
+  return new (Mem) RecoveryExpr(EmptyShell(), NumSubExprs);
 }
 
 void OMPArrayShapingExpr::setDimensions(ArrayRef<Expr *> Dims) {
Index: clang/include/clang/AST/Expr.h
===================================================================
--- clang/include/clang/AST/Expr.h
+++ clang/include/clang/AST/Expr.h
@@ -6080,7 +6080,8 @@
 private:
   RecoveryExpr(ASTContext &Ctx, SourceLocation BeginLoc, SourceLocation EndLoc,
                ArrayRef<Expr *> SubExprs);
-  RecoveryExpr(EmptyShell Empty) : Expr(RecoveryExprClass, Empty) {}
+  RecoveryExpr(EmptyShell Empty, unsigned NumSubExprs)
+      : Expr(RecoveryExprClass, Empty), NumExprs(NumSubExprs) {}
 
   size_t numTrailingObjects(OverloadToken<Stmt *>) const { return NumExprs; }
 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D78284.258010.patch
Type: text/x-patch
Size: 1614 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20200416/37854186/attachment.bin>