Serialize `#pragma comment`.

`#pragma comment` was handled by Sema calling a function on ASTConsumer, and
CodeGen then implementing this function and writing things to its output.

Instead, introduce a PragmaCommentDecl AST node and hang one off the
TranslationUnitDecl for every `#pragma comment` line, and then use the regular
serialization machinery. (Since PragmaCommentDecl has codegen relevance, it's
eagerly deserialized.)

http://reviews.llvm.org/D17799


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@262493 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 17 deletions

diff --git a/lib/Sema/SemaAttr.cpp b/lib/Sema/SemaAttr.cpp
index f3145713d5..1900d80b21 100644
--- a/lib/Sema/SemaAttr.cpp
+++ b/lib/Sema/SemaAttr.cpp
@@ -269,23 +269,12 @@ void Sema::ActOnPragmaMSStruct(PragmaMSStructKind Kind) {
   MSStructPragmaOn = (Kind == PMSST_ON);
 }
 
-void Sema::ActOnPragmaMSComment(PragmaMSCommentKind Kind, StringRef Arg) {
-  // FIXME: Serialize this.
-  switch (Kind) {
-  case PCK_Unknown:
-    llvm_unreachable("unexpected pragma comment kind");
-  case PCK_Linker:
-    Consumer.HandleLinkerOption(Arg);
-    return;
-  case PCK_Lib:
-    Consumer.HandleDependentLibrary(Arg);
-    return;
-  case PCK_Compiler:
-  case PCK_ExeStr:
-  case PCK_User:
-    return;  // We ignore all of these.
-  }
-  llvm_unreachable("invalid pragma comment kind");
+void Sema::ActOnPragmaMSComment(SourceLocation CommentLoc,
+                                PragmaMSCommentKind Kind, StringRef Arg) {
+  auto *PCD = PragmaCommentDecl::Create(
+      Context, Context.getTranslationUnitDecl(), CommentLoc, Kind, Arg);
+  Context.getTranslationUnitDecl()->addDecl(PCD);
+  Consumer.HandleTopLevelDecl(DeclGroupRef(PCD));
 }
 
 void Sema::ActOnPragmaDetectMismatch(StringRef Name, StringRef Value) {