From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Wed, 16 Oct 2013 19:28:50 +0000 (+0000)
Subject: Emit a .ident saying that clang produced this file.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=9686f1234e1b9a44270452477e6690ccadcd204a;p=clang

Emit a .ident saying that clang produced this file.

Patch by Katya Romanova.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@192832 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 17bca0a6f3..7682efc752 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -35,6 +35,7 @@
 #include "clang/Basic/Module.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/Version.h"
 #include "clang/Frontend/CodeGenOptions.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/Triple.h"
@@ -204,6 +205,8 @@ void CodeGenModule::Release() {
 
   if (DebugInfo)
     DebugInfo->finalize();
+
+  EmitVersionIdentMetadata();
 }
 
 void CodeGenModule::UpdateCompletedType(const TagDecl *TD) {
@@ -3034,6 +3037,18 @@ void CodeGenFunction::EmitDeclMetadata() {
   }
 }
 
+void CodeGenModule::EmitVersionIdentMetadata() {
+  llvm::NamedMDNode *IdentMetadata =
+    TheModule.getOrInsertNamedMetadata("llvm.ident");
+  std::string Version = getClangFullVersion();
+  llvm::LLVMContext &Ctx = TheModule.getContext();
+
+  llvm::Value *IdentNode[] = {
+    llvm::MDString::get(Ctx, Version)
+  };
+  IdentMetadata->addOperand(llvm::MDNode::get(Ctx, IdentNode));
+}
+
 void CodeGenModule::EmitCoverageFile() {
   if (!getCodeGenOpts().CoverageFile.empty()) {
     if (llvm::NamedMDNode *CUNode = TheModule.getNamedMetadata("llvm.dbg.cu")) {
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index 1f49802e3e..066009ca7d 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -1094,6 +1094,9 @@ private:
 
   void EmitDeclMetadata();
 
+  /// \brief Emit the Clang version as llvm.ident metadata.
+  void EmitVersionIdentMetadata();
+
   /// EmitCoverageFile - Emit the llvm.gcov metadata used to tell LLVM where
   /// to emit the .gcno and .gcda files in a way that persists in .bc files.
   void EmitCoverageFile();
diff --git a/test/CodeGenObjC/ivar-base-as-invariant-load.m b/test/CodeGenObjC/ivar-base-as-invariant-load.m
index 8b660cf483..19dc6587f5 100644
--- a/test/CodeGenObjC/ivar-base-as-invariant-load.m
+++ b/test/CodeGenObjC/ivar-base-as-invariant-load.m
@@ -23,7 +23,7 @@
 
 @end
 
-// CHECK: [[T1:%.*]] = load i64* @"OBJC_IVAR_$_A._flags", !invariant.load !4
-// CHECK: [[T2:%.*]] = load i64* @"OBJC_IVAR_$_A._flags", !invariant.load !4
-// CHECK: [[T3:%.*]] = load i64* @"OBJC_IVAR_$_A._flags", !invariant.load !4
+// CHECK: [[T1:%.*]] = load i64* @"OBJC_IVAR_$_A._flags", !invariant.load !5
+// CHECK: [[T2:%.*]] = load i64* @"OBJC_IVAR_$_A._flags", !invariant.load !5
+// CHECK: [[T3:%.*]] = load i64* @"OBJC_IVAR_$_A._flags", !invariant.load !5
 
diff --git a/test/Driver/ident_md.c b/test/Driver/ident_md.c
new file mode 100644
index 0000000000..d7da31707f
--- /dev/null
+++ b/test/Driver/ident_md.c
@@ -0,0 +1,6 @@
+// RUN: %clang %s -emit-llvm -S -o - | FileCheck %s
+// Verify that clang version appears in the llvm.ident metadata.
+
+// CHECK: !llvm.ident = !{!0}
+// CHECK: !0 = metadata !{metadata !{{.*}}
+