More large integer support.

 - Allow constructing a ConstantExpr from an APInt, too painful otherwise.

 - Parser support for large integers.


git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@74278 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/Expr/Parser.cpp b/lib/Expr/Parser.cpp
index 2b9777cb..42e8af03 100644
--- a/lib/Expr/Parser.cpp
+++ b/lib/Expr/Parser.cpp
@@ -1462,7 +1462,7 @@ ExprResult ParserImpl::ParseNumberToken(Expr::Width Type, const Token &Tok) {
   }
 
   // This is a simple but slow way to handle overflow.
-  APInt Val(std::max(64U, RadixBits * N), 0);
+  APInt Val(RadixBits * N, 0);
   APInt RadixVal(Val.getBitWidth(), Radix);
   APInt DigitVal(Val.getBitWidth(), 0);
   for (unsigned i=0; i<N; ++i) {
@@ -1496,9 +1496,11 @@ ExprResult ParserImpl::ParseNumberToken(Expr::Width Type, const Token &Tok) {
     Val = -Val;
 
   if (Type < Val.getBitWidth())
-    Val = Val.trunc(Type);
+    Val.trunc(Type);
+  else if (Type > Val.getBitWidth())
+    Val.zext(Type);
 
-  return ExprResult(Builder->Constant(Val.getZExtValue(), Type));
+  return ExprResult(Builder->Constant(Val));
 }
 
 /// ParseTypeSpecifier - Parse a type specifier.