Implement *skeletal* support for representing GNU inline asm stmts in the AST,

resolving a crash on a .i file in PR1750.  We now generate 49 errors on the
.i file in that bug.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@43433 91177308-0d34-0410-b5e6-96231b3b80d8

9 files changed, 48 insertions, 5 deletions

diff --git a/AST/Stmt.cpp b/AST/Stmt.cpp
index 96acbd15ba..e8ecd0c987 100644
--- a/AST/Stmt.cpp
+++ b/AST/Stmt.cpp
@@ -189,3 +189,7 @@ Stmt::child_iterator ReturnStmt::child_end() {
   else return child_iterator();
 }
 
+// AsmStmt
+Stmt::child_iterator AsmStmt::child_begin() { return child_iterator(); }
+Stmt::child_iterator AsmStmt::child_end() { return child_iterator(); }
+
diff --git a/AST/StmtPrinter.cpp b/AST/StmtPrinter.cpp
index 1a433a6815..ac6da0638d 100644
--- a/AST/StmtPrinter.cpp
+++ b/AST/StmtPrinter.cpp
@@ -316,6 +316,11 @@ void StmtPrinter::VisitReturnStmt(ReturnStmt *Node) {
   OS << ";\n";
 }
 
+
+void StmtPrinter::VisitAsmStmt(AsmStmt *Node) {
+  Indent() << "asm (/*todo*/);\n";
+}
+
 //===----------------------------------------------------------------------===//
 //  Expr printing methods.
 //===----------------------------------------------------------------------===//
diff --git a/Parse/ParseStmt.cpp b/Parse/ParseStmt.cpp
index 9df20b4ade..68781c1be4 100644
--- a/Parse/ParseStmt.cpp
+++ b/Parse/ParseStmt.cpp
@@ -903,7 +903,7 @@ Parser::StmtResult Parser::ParseReturnStatement() {
 ///
 Parser::StmtResult Parser::ParseAsmStatement() {
   assert(Tok.is(tok::kw_asm) && "Not an asm stmt");
-  ConsumeToken();
+  SourceLocation AsmLoc = ConsumeToken();
   
   DeclSpec DS;
   SourceLocation Loc = Tok.getLocation();
@@ -948,10 +948,10 @@ Parser::StmtResult Parser::ParseAsmStatement() {
     }
   }
   
-  MatchRHSPunctuation(tok::r_paren, Loc);
+  SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, Loc);
   
-  // FIXME: Implement action for asm parsing.
-  return false;
+  // FIXME: Pass all the details down to the action.
+  return Actions.ActOnAsmStmt(AsmLoc, RParenLoc);
 }
 
 /// ParseAsmOperands - Parse the asm-operands production as used by
diff --git a/Sema/Sema.h b/Sema/Sema.h
index 70d2f55ff8..f553356657 100644
--- a/Sema/Sema.h
+++ b/Sema/Sema.h
@@ -337,6 +337,9 @@ public:
   virtual StmtResult ActOnReturnStmt(SourceLocation ReturnLoc,
                                      ExprTy *RetValExp);
   
+  virtual StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 
+                                  SourceLocation RParenLoc);
+  
   //===--------------------------------------------------------------------===//
   // Expression Parsing Callbacks: SemaExpr.cpp.
 
diff --git a/Sema/SemaStmt.cpp b/Sema/SemaStmt.cpp
index 460b50ccbf..31dc236709 100644
--- a/Sema/SemaStmt.cpp
+++ b/Sema/SemaStmt.cpp
@@ -644,3 +644,7 @@ Sema::ActOnReturnStmt(SourceLocation ReturnLoc, ExprTy *rex) {
   return new ReturnStmt(ReturnLoc, (Expr*)RetValExp);
 }
 
+Sema::StmtResult Sema::ActOnAsmStmt(SourceLocation AsmLoc, 
+                                    SourceLocation RParenLoc) {
+  return new AsmStmt(AsmLoc, RParenLoc);
+}
diff --git a/clang.xcodeproj/project.pbxproj b/clang.xcodeproj/project.pbxproj
index fe4cf8d85b..de41b4628d 100644
--- a/clang.xcodeproj/project.pbxproj
+++ b/clang.xcodeproj/project.pbxproj
@@ -756,7 +756,6 @@
 		08FB7793FE84155DC02AAC07 /* Project object */ = {
 			isa = PBXProject;
 			buildConfigurationList = 1DEB923508733DC60010E9CD /* Build configuration list for PBXProject "clang" */;
-			compatibilityVersion = "Xcode 2.4";
 			hasScannedForEncodings = 1;
 			mainGroup = 08FB7794FE84155DC02AAC07 /* clang */;
 			projectDirPath = "";
diff --git a/include/clang/AST/Stmt.h b/include/clang/AST/Stmt.h
index 2ebb387065..5f4c0d39c5 100644
--- a/include/clang/AST/Stmt.h
+++ b/include/clang/AST/Stmt.h
@@ -660,6 +660,27 @@ public:
   virtual child_iterator child_end();
 };
 
+/// AsmStmt - This represents a GNU inline-assembly statement extension.
+///
+class AsmStmt : public Stmt {
+  SourceLocation AsmLoc, RParenLoc;
+  // FIXME: This doesn't capture most of the interesting pieces.
+public:
+  AsmStmt(SourceLocation asmloc, SourceLocation rparenloc)
+    : Stmt(AsmStmtClass), AsmLoc(asmloc), RParenLoc(rparenloc) {}
+  
+  virtual SourceRange getSourceRange() const {
+    return SourceRange(AsmLoc, RParenLoc);
+  }
+  
+  static bool classof(const Stmt *T) {return T->getStmtClass() == AsmStmtClass;}
+  static bool classof(const AsmStmt *) { return true; }
+  
+  virtual child_iterator child_begin();
+  virtual child_iterator child_end();
+};
+
+
 }  // end namespace clang
 
 //===----------------------------------------------------------------------===//
diff --git a/include/clang/AST/StmtNodes.def b/include/clang/AST/StmtNodes.def
index c8b822139c..469f0a8c2c 100644
--- a/include/clang/AST/StmtNodes.def
+++ b/include/clang/AST/StmtNodes.def
@@ -40,6 +40,9 @@ STMT(14, BreakStmt       , Stmt)
 STMT(15, ReturnStmt      , Stmt)
 STMT(16, DeclStmt        , Stmt)
 STMT(17, SwitchCase      , Stmt)
+
+// GNU Stmt Extensions
+STMT(18, AsmStmt         , Stmt)
 LAST_STMT(17)
 
 FIRST_EXPR(31)
diff --git a/include/clang/Parse/Action.h b/include/clang/Parse/Action.h
index 24b47c660f..a237bf3c27 100644
--- a/include/clang/Parse/Action.h
+++ b/include/clang/Parse/Action.h
@@ -282,6 +282,10 @@ public:
                                      ExprTy *RetValExp) {
     return 0;
   }
+  virtual StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 
+                                  SourceLocation RParenLoc) {
+    return 0;
+  }
   
   //===--------------------------------------------------------------------===//
   // Expression Parsing Callbacks.