Move CallbackVHs dtor inline, it can be devirtualized in many cases. Move the other...

[oota-llvm.git] / include / llvm / Support / MathExtras.h

diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h
index 6740786dec7e642b8711015e42c7ab861b37ce29..d085c94f2adc24e362307c535ca0008c957b0b5e 100644 (file)
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -51,6 +51,13 @@ inline bool isInt<32>(int64_t x) {
   return static_cast<int32_t>(x) == x;
 }
 
+/// isShiftedInt<N,S> - Checks if a signed integer is an N bit number shifted
+///                     left by S.
+template<unsigned N, unsigned S>
+inline bool isShiftedInt(int64_t x) {
+  return isInt<N+S>(x) && (x % (1<<S) == 0);
+}
+
 /// isUInt - Checks if an unsigned integer fits into the given bit width.
 template<unsigned N>
 inline bool isUInt(uint64_t x) {
@@ -70,12 +77,25 @@ inline bool isUInt<32>(uint64_t x) {
   return static_cast<uint32_t>(x) == x;
 }
 
+/// isShiftedUInt<N,S> - Checks if a unsigned integer is an N bit number shifted
+///                     left by S.
+template<unsigned N, unsigned S>
+inline bool isShiftedUInt(uint64_t x) {
+  return isUInt<N+S>(x) && (x % (1<<S) == 0);
+}
+
 /// isUIntN - Checks if an unsigned integer fits into the given (dynamic)
 /// bit width.
 inline bool isUIntN(unsigned N, uint64_t x) {
   return x == (x & (~0ULL >> (64 - N)));
 }
 
+/// isIntN - Checks if an signed integer fits into the given (dynamic)
+/// bit width.
+inline bool isIntN(unsigned N, int64_t x) {
+  return N >= 64 || (-(INT64_C(1)<<(N-1)) <= x && x < (INT64_C(1)<<(N-1)));
+}
+
 /// isMask_32 - This function returns true if the argument is a sequence of ones
 /// starting at the least significant bit with the remainder zero (32 bit
 /// version).   Ex. isMask_32(0x0000FFFFU) == true.