Make the size and expr arguments of .fill directive optional.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191318 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index c1f825ae785a966e4cda8a95f7fa9ab98490f046..1267dc814cde2c61d11e981868ed3c4529f840b7 100644 (file)
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -2353,7 +2353,7 @@ bool AsmParser::parseDirectiveZero() {
 }
 
 /// parseDirectiveFill
-///  ::= .fill expression , expression , expression
+///  ::= .fill expression [ , expression [ , expression ] ]
 bool AsmParser::parseDirectiveFill() {
   checkForValidSection();
 
@@ -2361,26 +2361,31 @@ bool AsmParser::parseDirectiveFill() {
   if (parseAbsoluteExpression(NumValues))
     return true;
 
-  if (getLexer().isNot(AsmToken::Comma))
-    return TokError("unexpected token in '.fill' directive");
-  Lex();
+  int64_t FillSize = 1;
+  int64_t FillExpr = 0;
 
-  int64_t FillSize;
-  if (parseAbsoluteExpression(FillSize))
-    return true;
+  if (getLexer().isNot(AsmToken::EndOfStatement)) {
+    if (getLexer().isNot(AsmToken::Comma))
+      return TokError("unexpected token in '.fill' directive");
+    Lex();
 
-  if (getLexer().isNot(AsmToken::Comma))
-    return TokError("unexpected token in '.fill' directive");
-  Lex();
+    if (parseAbsoluteExpression(FillSize))
+      return true;
 
-  int64_t FillExpr;
-  if (parseAbsoluteExpression(FillExpr))
-    return true;
+    if (getLexer().isNot(AsmToken::EndOfStatement)) {
+      if (getLexer().isNot(AsmToken::Comma))
+        return TokError("unexpected token in '.fill' directive");
+      Lex();
 
-  if (getLexer().isNot(AsmToken::EndOfStatement))
-    return TokError("unexpected token in '.fill' directive");
+      if (parseAbsoluteExpression(FillExpr))
+        return true;
 
-  Lex();
+      if (getLexer().isNot(AsmToken::EndOfStatement))
+        return TokError("unexpected token in '.fill' directive");
+
+      Lex();
+    }
+  }
 
   if (FillSize != 1 && FillSize != 2 && FillSize != 4 && FillSize != 8)
     return TokError("invalid '.fill' size, expected 1, 2, 4, or 8");

diff --git a/test/MC/AsmParser/directive_fill.s b/test/MC/AsmParser/directive_fill.s
index 60bd468cd34884df1ba3ae6b61dea73a00c1df2b..bb3ced091c8033286e594f404193552be814d3be 100644 (file)
--- a/test/MC/AsmParser/directive_fill.s
+++ b/test/MC/AsmParser/directive_fill.s
@@ -15,3 +15,19 @@ TEST1:
 # CHECK: .quad 4
 TEST2:  
         .fill 1, 8, 4
+
+# CHECK: TEST3
+# CHECK: .byte 0
+# CHECK: .byte 0
+# CHECK: .byte 0
+# CHECK: .byte 0
+TEST3:
+       .fill 4
+
+# CHECK: TEST4
+# CHECK: .short 0
+# CHECK: .short 0
+# CHECK: .short 0
+# CHECK: .short 0
+TEST4:
+       .fill 4, 2