Change TableGen so that binary literals such as 0b001 are now sized.

Instead of these becoming an integer literal internally, they now become bits<n> values.

Prior to this change, 0b001 was 1 bit long.  This is confusing as clearly the user gave 3 bits.
This new type holds both the literal value and the size, and so can ensure sizes match on initializers.

For example, this used to be legal

bits<1> x = 0b00;

but now it must be written as

bits<2> x = 0b00;

llvm-svn: 215084

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/TableGen/TGParser.cpp b/llvm/lib/TableGen/TGParser.cpp
index d020a8bdc1a..709c7a52b9f 100644
--- a/llvm/lib/TableGen/TGParser.cpp
+++ b/llvm/lib/TableGen/TGParser.cpp
@@ -1182,6 +1182,15 @@ Init *TGParser::ParseSimpleValue(Record *CurRec, RecTy *ItemType,
     Lex.Lex();  // Skip '#'.
     return ParseSimpleValue(CurRec, ItemType, Mode);
   case tgtok::IntVal: R = IntInit::get(Lex.getCurIntVal()); Lex.Lex(); break;
+  case tgtok::BinaryIntVal: {
+    auto BinaryVal = Lex.getCurBinaryIntVal();
+    SmallVector<Init*, 16> Bits(BinaryVal.second);
+    for (unsigned i = 0, e = BinaryVal.second; i != e; ++i)
+      Bits[i] = BitInit::get(BinaryVal.first & (1 << i));
+    R = BitsInit::get(Bits);
+    Lex.Lex();
+    break;
+  }
   case tgtok::StrVal: {
     std::string Val = Lex.getCurStrVal();
     Lex.Lex();