1 files changed, 42 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/APSInt.cpp b/contrib/llvm/lib/Support/APSInt.cpp
new file mode 100644
index 0000000..975457c
--- /dev/null
+++ b/contrib/llvm/lib/Support/APSInt.cpp
@@ -0,0 +1,42 @@
+//===-- llvm/ADT/APSInt.cpp - Arbitrary Precision Signed Int ---*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the APSInt class, which is a simple class that
+// represents an arbitrary sized integer that knows its signedness.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/APSInt.h"
+#include "llvm/ADT/FoldingSet.h"
+
+using namespace llvm;
+
+APSInt::APSInt(StringRef Str) {
+  assert(!Str.empty() && "Invalid string length");
+
+  // (Over-)estimate the required number of bits.
+  unsigned NumBits = ((Str.size() * 64) / 19) + 2;
+  APInt Tmp(NumBits, Str, /*Radix=*/10);
+  if (Str[0] == '-') {
+    unsigned MinBits = Tmp.getMinSignedBits();
+    if (MinBits > 0 && MinBits < NumBits)
+      Tmp = Tmp.trunc(MinBits);
+    *this = APSInt(Tmp, /*IsUnsigned=*/false);
+    return;
+  }
+  unsigned ActiveBits = Tmp.getActiveBits();
+  if (ActiveBits > 0 && ActiveBits < NumBits)
+    Tmp = Tmp.trunc(ActiveBits);
+  *this = APSInt(Tmp, /*IsUnsigned=*/true);
+}
+
+void APSInt::Profile(FoldingSetNodeID& ID) const {
+  ID.AddInteger((unsigned) (IsUnsigned ? 1 : 0));
+  APInt::Profile(ID);
+}