3 files changed, 29 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index ad5c617623f..21511586ff1 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -252,6 +252,7 @@ static MIToken::TokenKind getIdentifierKind(StringRef Identifier) {
       .Case("shufflemask", MIToken::kw_shufflemask)
       .Case("pre-instr-symbol", MIToken::kw_pre_instr_symbol)
       .Case("post-instr-symbol", MIToken::kw_post_instr_symbol)
+      .Case("heap-alloc-marker", MIToken::kw_heap_alloc_marker)
       .Case("unknown-size", MIToken::kw_unknown_size)
       .Default(MIToken::Identifier);
 }
@@ -582,8 +583,8 @@ static MIToken::TokenKind getMetadataKeywordKind(StringRef Identifier) {
       .Default(MIToken::Error);
 }
 
-static Cursor maybeLexExlaim(Cursor C, MIToken &Token,
-                             ErrorCallbackType ErrorCallback) {
+static Cursor maybeLexExclaim(Cursor C, MIToken &Token,
+                              ErrorCallbackType ErrorCallback) {
   if (C.peek() != '!')
     return None;
   auto Range = C;
@@ -719,7 +720,7 @@ StringRef llvm::lexMIToken(StringRef Source, MIToken &Token,
     return R.remaining();
   if (Cursor R = maybeLexNumericalLiteral(C, Token))
     return R.remaining();
-  if (Cursor R = maybeLexExlaim(C, Token, ErrorCallback))
+  if (Cursor R = maybeLexExclaim(C, Token, ErrorCallback))
     return R.remaining();
   if (Cursor R = maybeLexSymbol(C, Token))
     return R.remaining();
diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.h b/llvm/lib/CodeGen/MIRParser/MILexer.h
index 200f9d026cc..1e2eba91ceb 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.h
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.h
@@ -120,6 +120,7 @@ struct MIToken {
     kw_shufflemask,
     kw_pre_instr_symbol,
     kw_post_instr_symbol,
+    kw_heap_alloc_marker,
     kw_unknown_size,
 
     // Named metadata keywords
diff --git a/llvm/lib/CodeGen/MIRParser/MIParser.cpp b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
index 6498acc9fa5..525c70016a0 100644
--- a/llvm/lib/CodeGen/MIRParser/MIParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIParser.cpp
@@ -471,6 +471,7 @@ public:
   bool parseOptionalAtomicOrdering(AtomicOrdering &Order);
   bool parseMachineMemoryOperand(MachineMemOperand *&Dest);
   bool parsePreOrPostInstrSymbol(MCSymbol *&Symbol);
+  bool parseHeapAllocMarker(MDNode *&Node);
 
 private:
   /// Convert the integer literal in the current token into an unsigned integer.
@@ -906,6 +907,7 @@ bool MIParser::parse(MachineInstr *&MI) {
   // Parse the remaining machine operands.
   while (!Token.isNewlineOrEOF() && Token.isNot(MIToken::kw_pre_instr_symbol) &&
          Token.isNot(MIToken::kw_post_instr_symbol) &&
+         Token.isNot(MIToken::kw_heap_alloc_marker) &&
          Token.isNot(MIToken::kw_debug_location) &&
          Token.isNot(MIToken::coloncolon) && Token.isNot(MIToken::lbrace)) {
     auto Loc = Token.location();
@@ -932,6 +934,10 @@ bool MIParser::parse(MachineInstr *&MI) {
   if (Token.is(MIToken::kw_post_instr_symbol))
     if (parsePreOrPostInstrSymbol(PostInstrSymbol))
       return true;
+  MDNode *HeapAllocMarker = nullptr;
+  if (Token.is(MIToken::kw_heap_alloc_marker))
+    if (parseHeapAllocMarker(HeapAllocMarker))
+      return true;
 
   DebugLoc DebugLocation;
   if (Token.is(MIToken::kw_debug_location)) {
@@ -985,6 +991,8 @@ bool MIParser::parse(MachineInstr *&MI) {
     MI->setPreInstrSymbol(MF, PreInstrSymbol);
   if (PostInstrSymbol)
     MI->setPostInstrSymbol(MF, PostInstrSymbol);
+  if (HeapAllocMarker)
+    MI->setHeapAllocMarker(MF, HeapAllocMarker);
   if (!MemOperands.empty())
     MI->setMemRefs(MF, MemOperands);
   return false;
@@ -2956,6 +2964,22 @@ bool MIParser::parsePreOrPostInstrSymbol(MCSymbol *&Symbol) {
   return false;
 }
 
+bool MIParser::parseHeapAllocMarker(MDNode *&Node) {
+  assert(Token.is(MIToken::kw_heap_alloc_marker) &&
+         "Invalid token for a heap alloc marker!");
+  lex();
+  parseMDNode(Node);
+  if (!Node)
+    return error("expected a MDNode after 'heap-alloc-marker'");
+  if (Token.isNewlineOrEOF() || Token.is(MIToken::coloncolon) ||
+      Token.is(MIToken::lbrace))
+    return false;
+  if (Token.isNot(MIToken::comma))
+    return error("expected ',' before the next machine operand");
+  lex();
+  return false;
+}
+
 static void initSlots2BasicBlocks(
     const Function &F,
     DenseMap<unsigned, const BasicBlock *> &Slots2BasicBlocks) {