Allow CompilerInvocations to generate .d files.

Summary:
Most clang tools should ignore the -M
family of options because one wouldn't want them
to generate a new dependency (.d) file. However,
some tools may want this dependency file. This
patch creates a mechanism for them to do this.

This implementation just plumbs a boolean down
several layers of calls. Each of the modified calls
has several call sites, and so a single member
variable or new API entry point won't work.

An alternative would be to write a function to filter
the -M family of arguments out of CC1Args, and have
each caller call that function by hand before calling
newInvocation, Invocation::run, or buildAstFromCodeWithArgs.
This is a more complicated and error-prone solution.
Why burden all the callers to remember to use
this function?

But I could rewrite this patch to use that method if
that is deemed more appropriate.

Reviewers: klimek

Reviewed By: klimek

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D34304

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@307315 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 8 insertions, 1 deletions

diff --git a/include/clang/Tooling/ArgumentsAdjusters.h b/include/clang/Tooling/ArgumentsAdjusters.h
index 1fd7be6887..4eb02251a7 100644
--- a/include/clang/Tooling/ArgumentsAdjusters.h
+++ b/include/clang/Tooling/ArgumentsAdjusters.h
@@ -44,6 +44,10 @@ ArgumentsAdjuster getClangSyntaxOnlyAdjuster();
 /// arguments.
 ArgumentsAdjuster getClangStripOutputAdjuster();
 
+/// \brief Gets an argument adjuster which removes dependency-file
+/// related command line arguments.
+ArgumentsAdjuster getClangStripDependencyFileAdjuster();
+
 enum class ArgumentInsertPosition { BEGIN, END };
 
 /// \brief Gets an argument adjuster which inserts \p Extra arguments in the
diff --git a/include/clang/Tooling/Tooling.h b/include/clang/Tooling/Tooling.h
index 1c974f9988..6f9bc9e1a1 100644
--- a/include/clang/Tooling/Tooling.h
+++ b/include/clang/Tooling/Tooling.h
@@ -202,12 +202,15 @@ buildASTFromCode(const Twine &Code, const Twine &FileName = "input.cc",
 /// \param PCHContainerOps The PCHContainerOperations for loading and creating
 /// clang modules.
 ///
+/// \param Adjuster A function to filter the command line arguments as specified.
+///
 /// \return The resulting AST or null if an error occurred.
 std::unique_ptr<ASTUnit> buildASTFromCodeWithArgs(
     const Twine &Code, const std::vector<std::string> &Args,
     const Twine &FileName = "input.cc", const Twine &ToolName = "clang-tool",
     std::shared_ptr<PCHContainerOperations> PCHContainerOps =
-        std::make_shared<PCHContainerOperations>());
+      std::make_shared<PCHContainerOperations>(),
+    ArgumentsAdjuster Adjuster = getClangStripDependencyFileAdjuster());
 
 /// \brief Utility to run a FrontendAction in a single clang invocation.
 class ToolInvocation {