From: Chris Lattner <sabre@nondot.org>
Date: Wed, 30 Dec 2009 05:44:30 +0000 (+0000)
Subject: reimplement ParseOptionalInfo as ParseOptionalCommaAlign, correctly
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c3a6c5c83b5fa7b813de1741ac9e9be702b03846;p=oota-llvm.git

reimplement ParseOptionalInfo as ParseOptionalCommaAlign, correctly
handle the comma case for metadata.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92301 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 1fd750e1dc2..967842ad1e9 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -1100,19 +1100,27 @@ bool LLParser::ParseOptionalAlignment(unsigned &Alignment) {
   return false;
 }
 
-/// ParseOptionalInfo
-///   ::= OptionalInfo (',' OptionalInfo)+
-bool LLParser::ParseOptionalInfo(unsigned &Alignment) {
-
-  // FIXME: Handle customized metadata info attached with an instruction.
-  do {
+/// ParseOptionalCommaAlign
+///   ::= 
+///   ::= ',' align 4
+///
+/// This returns with AteExtraComma set to true if it ate an excess comma at the
+/// end.
+bool LLParser::ParseOptionalCommaAlign(unsigned &Alignment,
+                                       bool &AteExtraComma) {
+  AteExtraComma = false;
+  while (EatIfPresent(lltok::comma)) {
+    // Metadata at the end is an early exit.
     if (Lex.getKind() == lltok::MetadataVar) {
-      if (ParseInstructionMetadata()) return true;
-    } else if (Lex.getKind() == lltok::kw_align) {
+      AteExtraComma = true;
+      return false;
+    }
+    
+    if (Lex.getKind() == lltok::kw_align) {
       if (ParseOptionalAlignment(Alignment)) return true;
     } else
       return true;
-  } while (EatIfPresent(lltok::comma));
+  }
 
   return false;
 }
@@ -3631,22 +3639,24 @@ bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS,
 /// ParseAlloc
 ///   ::= 'malloc' Type (',' TypeAndValue)? (',' OptionalInfo)?
 ///   ::= 'alloca' Type (',' TypeAndValue)? (',' OptionalInfo)?
-bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS,
-                          BasicBlock* BB, bool isAlloca) {
+int LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS,
+                         BasicBlock* BB, bool isAlloca) {
   PATypeHolder Ty(Type::getVoidTy(Context));
   Value *Size = 0;
   LocTy SizeLoc;
   unsigned Alignment = 0;
   if (ParseType(Ty)) return true;
 
+  bool AteExtraComma = false;
   if (EatIfPresent(lltok::comma)) {
-    if (Lex.getKind() == lltok::kw_align 
-        || Lex.getKind() == lltok::MetadataVar) {
-      if (ParseOptionalInfo(Alignment)) return true;
+    if (Lex.getKind() == lltok::kw_align) {
+      if (ParseOptionalAlignment(Alignment)) return true;
+    } else if (Lex.getKind() == lltok::MetadataVar) {
+      AteExtraComma = true;
     } else {
-      if (ParseTypeAndValue(Size, SizeLoc, PFS)) return true;
-      if (EatIfPresent(lltok::comma))
-        if (ParseOptionalInfo(Alignment)) return true;
+      if (ParseTypeAndValue(Size, SizeLoc, PFS) ||
+          ParseOptionalCommaAlign(Alignment, AteExtraComma))
+        return true;
     }
   }
 
@@ -3655,7 +3665,7 @@ bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS,
 
   if (isAlloca) {
     Inst = new AllocaInst(Ty, Size, Alignment);
-    return false;
+    return AteExtraComma ? InstExtraComma : InstNormal;
   }
 
   // Autoupgrade old malloc instruction to malloc call.
@@ -3669,7 +3679,7 @@ bool LLParser::ParseAlloc(Instruction *&Inst, PerFunctionState &PFS,
     MallocF = cast<Function>(
        M->getOrInsertFunction("", Type::getInt8PtrTy(Context), IntPtrTy, NULL));
   Inst = CallInst::CreateMalloc(BB, IntPtrTy, Ty, AllocSize, Size, MallocF);
-  return false;
+return AteExtraComma ? InstExtraComma : InstNormal;
 }
 
 /// ParseFree
@@ -3686,37 +3696,36 @@ bool LLParser::ParseFree(Instruction *&Inst, PerFunctionState &PFS,
 
 /// ParseLoad
 ///   ::= 'volatile'? 'load' TypeAndValue (',' OptionalInfo)?
-bool LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS,
-                         bool isVolatile) {
+int LLParser::ParseLoad(Instruction *&Inst, PerFunctionState &PFS,
+                        bool isVolatile) {
   Value *Val; LocTy Loc;
   unsigned Alignment = 0;
-  if (ParseTypeAndValue(Val, Loc, PFS)) return true;
-
-  if (EatIfPresent(lltok::comma))
-    if (ParseOptionalInfo(Alignment)) return true;
+  bool AteExtraComma = false;
+  if (ParseTypeAndValue(Val, Loc, PFS) ||
+      ParseOptionalCommaAlign(Alignment, AteExtraComma))
+    return true;
 
   if (!isa<PointerType>(Val->getType()) ||
       !cast<PointerType>(Val->getType())->getElementType()->isFirstClassType())
     return Error(Loc, "load operand must be a pointer to a first class type");
 
   Inst = new LoadInst(Val, "", isVolatile, Alignment);
-  return false;
+  return AteExtraComma ? InstExtraComma : InstNormal;
 }
 
 /// ParseStore
 ///   ::= 'volatile'? 'store' TypeAndValue ',' TypeAndValue (',' 'align' i32)?
-bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS,
-                          bool isVolatile) {
+int LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS,
+                         bool isVolatile) {
   Value *Val, *Ptr; LocTy Loc, PtrLoc;
   unsigned Alignment = 0;
+  bool AteExtraComma = false;
   if (ParseTypeAndValue(Val, Loc, PFS) ||
       ParseToken(lltok::comma, "expected ',' after store operand") ||
-      ParseTypeAndValue(Ptr, PtrLoc, PFS))
+      ParseTypeAndValue(Ptr, PtrLoc, PFS) ||
+      ParseOptionalCommaAlign(Alignment, AteExtraComma))
     return true;
 
-  if (EatIfPresent(lltok::comma))
-    if (ParseOptionalInfo(Alignment)) return true;
-
   if (!isa<PointerType>(Ptr->getType()))
     return Error(PtrLoc, "store operand must be a pointer");
   if (!Val->getType()->isFirstClassType())
@@ -3725,7 +3734,7 @@ bool LLParser::ParseStore(Instruction *&Inst, PerFunctionState &PFS,
     return Error(Loc, "stored value and pointer type do not match");
 
   Inst = new StoreInst(Val, Ptr, isVolatile, Alignment);
-  return false;
+  return AteExtraComma ? InstExtraComma : InstNormal;
 }
 
 /// ParseGetResult
diff --git a/lib/AsmParser/LLParser.h b/lib/AsmParser/LLParser.h
index 8fd04d0bcc2..f22c49b6305 100644
--- a/lib/AsmParser/LLParser.h
+++ b/lib/AsmParser/LLParser.h
@@ -172,7 +172,7 @@ namespace llvm {
     bool ParseOptionalCallingConv(CallingConv::ID &CC);
     bool ParseOptionalAlignment(unsigned &Alignment);
     bool ParseInstructionMetadata();
-    bool ParseOptionalInfo(unsigned &Alignment);
+    bool ParseOptionalCommaAlign(unsigned &Alignment, bool &AteExtraComma);
     bool ParseIndexList(SmallVectorImpl<unsigned> &Indices,bool &AteExtraComma);
     bool ParseIndexList(SmallVectorImpl<unsigned> &Indices) {
       bool AteExtraComma;
@@ -341,11 +341,11 @@ namespace llvm {
     bool ParseShuffleVector(Instruction *&I, PerFunctionState &PFS);
     int ParsePHI(Instruction *&I, PerFunctionState &PFS);
     bool ParseCall(Instruction *&I, PerFunctionState &PFS, bool isTail);
-    bool ParseAlloc(Instruction *&I, PerFunctionState &PFS,
+    int ParseAlloc(Instruction *&I, PerFunctionState &PFS,
                     BasicBlock *BB = 0, bool isAlloca = true);
     bool ParseFree(Instruction *&I, PerFunctionState &PFS, BasicBlock *BB);
-    bool ParseLoad(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
-    bool ParseStore(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
+    int ParseLoad(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
+    int ParseStore(Instruction *&I, PerFunctionState &PFS, bool isVolatile);
     bool ParseGetResult(Instruction *&I, PerFunctionState &PFS);
     int ParseGetElementPtr(Instruction *&I, PerFunctionState &PFS);
     int ParseExtractValue(Instruction *&I, PerFunctionState &PFS);