[PATCH] D84145: [AST][RecoveryExpr] Fix a crash on opencl C++.

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: sammccall.
Herald added subscribers: Anastasia, yaxunl.
Herald added a project: clang.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D84145

Files:
  clang/lib/Sema/SemaDecl.cpp
  clang/test/SemaOpenCL/recovery-expr.cl


Index: clang/test/SemaOpenCL/recovery-expr.cl
===================================================================
--- /dev/null
+++ clang/test/SemaOpenCL/recovery-expr.cl
@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=clc++ -frecovery-ast
+
+void kernel nocrash() {
+  constant int L1 = 0;
+
+  private int *constant L2 = L1++; // expected-error {{read-only variable is not assignable}}
+}
Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -11067,8 +11067,14 @@
   // except that the aforementioned are allowed in unevaluated
   // expressions.  Everything else falls under the
   // "may accept other forms of constant expressions" exception.
-  // (We never end up here for C++, so the constant expression
-  // rules there don't matter.)
+  //
+  // Regular C++ code will not end up here (exceptions: language extensions,
+  // OpenCL C++ etc), so the constant expression rules there don't matter.
+  if (Init->isValueDependent()) {
+    assert(Init->containsErrors() &&
+           "Dependent code should only occur in error-recovery path.");
+    return true;
+  }
   const Expr *Culprit;
   if (Init->isConstantInitializer(Context, false, &Culprit))
     return false;


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