Prune include of DataLayout.h from include/clang/Basic/TargetInfo.h. NFC

Summary:
Use a forward declaration of DataLayout instead of including
DataLayout.h in clangs TargetInfo.h. This reduces include
dependencies toward DataLayout.h (and other headers such as
DerivedTypes.h, Type.h that is included by DataLayout.h).

Needed to move implemantation of TargetInfo::resetDataLayout
from TargetInfo.h to TargetInfo.cpp.

Reviewers: rnk

Reviewed By: rnk

Subscribers: jvesely, nhaehnle, cfe-commits, llvm-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69262

llvm-svn: 375438

5 files changed, 12 insertions, 4 deletions

diff --git a/clang/include/clang/Basic/TargetInfo.h b/clang/include/clang/Basic/TargetInfo.h
index 36109f1ccc0..9a3bb986930 100644
--- a/clang/include/clang/Basic/TargetInfo.h
+++ b/clang/include/clang/Basic/TargetInfo.h
@@ -19,14 +19,15 @@
 #include "clang/Basic/Specifiers.h"
 #include "clang/Basic/TargetCXXABI.h"
 #include "clang/Basic/TargetOptions.h"
+#include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/APInt.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"
-#include "llvm/IR/DataLayout.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/VersionTuple.h"
 #include <cassert>
@@ -35,6 +36,7 @@
 
 namespace llvm {
 struct fltSemantics;
+class DataLayout;
 }
 
 namespace clang {
@@ -198,9 +200,7 @@ protected:
   // TargetInfo Constructor.  Default initializes all fields.
   TargetInfo(const llvm::Triple &T);
 
-  void resetDataLayout(StringRef DL) {
-    DataLayout.reset(new llvm::DataLayout(DL));
-  }
+  void resetDataLayout(StringRef DL);
 
 public:
   /// Construct a target for the given options.
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
index 9a8783446ea..3a21a19e1f1 100644
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -17,6 +17,7 @@
 #include "clang/Basic/LangOptions.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/IR/DataLayout.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/TargetParser.h"
 #include <cstdlib>
@@ -136,6 +137,10 @@ TargetInfo::TargetInfo(const llvm::Triple &T) : TargetOpts(), Triple(T) {
 // Out of line virtual dtor for TargetInfo.
 TargetInfo::~TargetInfo() {}
 
+void TargetInfo::resetDataLayout(StringRef DL) {
+  DataLayout.reset(new llvm::DataLayout(DL));
+}
+
 bool
 TargetInfo::checkCFProtectionBranchSupported(DiagnosticsEngine &Diags) const {
   Diags.Report(diag::err_opt_not_valid_on_target) << "cf-protection=branch";
diff --git a/clang/lib/Basic/Targets/AMDGPU.cpp b/clang/lib/Basic/Targets/AMDGPU.cpp
index 07ba71d5c2b..481630c0fa4 100644
--- a/clang/lib/Basic/Targets/AMDGPU.cpp
+++ b/clang/lib/Basic/Targets/AMDGPU.cpp
@@ -17,6 +17,7 @@
 #include "clang/Basic/MacroBuilder.h"
 #include "clang/Basic/TargetBuiltins.h"
 #include "llvm/ADT/StringSwitch.h"
+#include "llvm/IR/DataLayout.h"
 
 using namespace clang;
 using namespace clang::targets;
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 3715dcfda41..c27c33c530f 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -24,6 +24,7 @@
 #include "clang/Lex/PreprocessorOptions.h"
 #include "clang/Serialization/ASTReader.h"
 #include "llvm/ADT/APFloat.h"
+#include "llvm/IR/DataLayout.h"
 using namespace clang;
 
 static bool MacroBodyEndsInBackslash(StringRef MacroBody) {
diff --git a/clang/unittests/AST/DeclTest.cpp b/clang/unittests/AST/DeclTest.cpp
index 7a662fb4fba..e095c4518ed 100644
--- a/clang/unittests/AST/DeclTest.cpp
+++ b/clang/unittests/AST/DeclTest.cpp
@@ -16,6 +16,7 @@
 #include "clang/Basic/LLVM.h"
 #include "clang/Tooling/Tooling.h"
 #include "gtest/gtest.h"
+#include "llvm/IR/DataLayout.h"
 
 using namespace clang::ast_matchers;
 using namespace clang::tooling;