MC: Allow multiple comma-separated expressions on the .uleb128 directive.

For compatiblity with GNU as. Binutils documents this as
'.uleb128 expressions'. Subtle, isn't it?

llvm-svn: 229911

1 files changed, 15 insertions, 9 deletions

diff --git a/llvm/lib/MC/MCParser/AsmParser.cpp b/llvm/lib/MC/MCParser/AsmParser.cpp
index c714f3ee261..ef6a54002d3 100644
--- a/llvm/lib/MC/MCParser/AsmParser.cpp
+++ b/llvm/lib/MC/MCParser/AsmParser.cpp
@@ -3636,21 +3636,27 @@ bool AsmParser::parseDirectiveSpace(StringRef IDVal) {
 }
 
 /// parseDirectiveLEB128
-/// ::= (.sleb128 | .uleb128) expression
+/// ::= (.sleb128 | .uleb128) [ expression (, expression)* ]
 bool AsmParser::parseDirectiveLEB128(bool Signed) {
   checkForValidSection();
   const MCExpr *Value;
 
-  if (parseExpression(Value))
-    return true;
+  for (;;) {
+    if (parseExpression(Value))
+      return true;
 
-  if (getLexer().isNot(AsmToken::EndOfStatement))
-    return TokError("unexpected token in directive");
+    if (Signed)
+      getStreamer().EmitSLEB128Value(Value);
+    else
+      getStreamer().EmitULEB128Value(Value);
 
-  if (Signed)
-    getStreamer().EmitSLEB128Value(Value);
-  else
-    getStreamer().EmitULEB128Value(Value);
+    if (getLexer().is(AsmToken::EndOfStatement))
+      break;
+
+    if (getLexer().isNot(AsmToken::Comma))
+      return TokError("unexpected token in directive");
+    Lex();
+  }
 
   return false;
 }