MIR Serialization: Serialize immediate machine operands.

Reviewers: Duncan P. N. Exon Smith

Differential Revision: http://reviews.llvm.org/D10573

llvm-svn: 240481

1 files changed, 13 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MILexer.cpp b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
index 1cc5956d9fb..b836221d9f0 100644
--- a/llvm/lib/CodeGen/MIRParser/MILexer.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MILexer.cpp
@@ -33,7 +33,7 @@ public:
 
   bool isEOF() const { return Ptr == End; }
 
-  char peek() const { return isEOF() ? 0 : *Ptr; }
+  char peek(unsigned I = 0) const { return End - Ptr <= I ? 0 : Ptr[I]; }
 
   void advance() { ++Ptr; }
 
@@ -77,6 +77,16 @@ static Cursor lexPercent(Cursor C, MIToken &Token) {
   return C;
 }
 
+static Cursor lexIntegerLiteral(Cursor C, MIToken &Token) {
+  auto Range = C;
+  C.advance();
+  while (isdigit(C.peek()))
+    C.advance();
+  StringRef StrVal = Range.upto(C);
+  Token = MIToken(MIToken::IntegerLiteral, StrVal, APSInt(StrVal));
+  return C;
+}
+
 static MIToken::TokenKind symbolToken(char C) {
   switch (C) {
   case ',':
@@ -109,6 +119,8 @@ StringRef llvm::lexMIToken(
     return lexIdentifier(C, Token).remaining();
   if (Char == '%')
     return lexPercent(C, Token).remaining();
+  if (isdigit(Char) || (Char == '-' && isdigit(C.peek(1))))
+    return lexIntegerLiteral(C, Token).remaining();
   MIToken::TokenKind Kind = symbolToken(Char);
   if (Kind != MIToken::Error)
     return lexSymbol(C, Kind, Token).remaining();