[PCH] Mark a PCH file with a flag to indicate if the serialized AST had

compiler errors or not.

-Control whether ASTReader should reject such a PCH by a boolean flag at ASTReader's creation time.
By default, such a PCH file will be rejected with an error when trying to load it.

[libclang] Allow clang_saveTranslationUnit to create a PCH file even if compiler errors
occurred.
-Have libclang API calls accept a PCH that had compiler errors.

The general idea is that we want libclang to stay functional even if a PCH had a compiler error.
rdar://10976363.

llvm-svn: 152192

1 files changed, 28 insertions, 0 deletions

diff --git a/clang/test/Index/pch-with-errors.c b/clang/test/Index/pch-with-errors.c
new file mode 100644
index 00000000000..21cf32a0cbf
--- /dev/null
+++ b/clang/test/Index/pch-with-errors.c
@@ -0,0 +1,28 @@
+
+#ifndef HEADER
+#define HEADER
+
+void erroneous(int);
+void erroneous(float);
+
+#else
+
+void foo(void) {
+  erroneous(0);
+}
+
+#endif
+
+// RUN: c-index-test -write-pch %t.h.pch %s
+// RUN: c-index-test -test-load-source local %s -include %t.h | FileCheck -check-prefix=CHECK-PARSE %s
+// RUN: c-index-test -index-file %s -include %t.h | FileCheck -check-prefix=CHECK-INDEX %s
+
+// CHECK-PARSE: pch-with-errors.c:10:6: FunctionDecl=foo:10:6 (Definition) Extent=[10:1 - 12:2]
+// CHECK-PARSE: pch-with-errors.c:11:3: CallExpr=erroneous:5:6 Extent=[11:3 - 11:15]
+
+// CHECK-INDEX: [indexDeclaration]: kind: function | name: foo
+// CHECK-INDEX: [indexEntityReference]: kind: function | name: erroneous
+
+// RUN: %clang -fsyntax-only %s -include %t.h 2>&1 | FileCheck -check-prefix=PCH-ERR %s
+
+// PCH-ERR: error: PCH file contains compiler errors