Extract LaneBitmask into a separate type

Specifically avoid implicit conversions from/to integral types to
avoid potential errors when changing the underlying type. For example,
a typical initialization of a "full" mask was "LaneMask = ~0u", which
would result in a value of 0x00000000FFFFFFFF if the type was extended
to uint64_t.

Differential Revision: https://reviews.llvm.org/D27454

llvm-svn: 289820

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonBlockRanges.cpp b/llvm/lib/Target/Hexagon/HexagonBlockRanges.cpp
index 938bdca054f..44637615b04 100644
--- a/llvm/lib/Target/Hexagon/HexagonBlockRanges.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonBlockRanges.cpp
@@ -234,13 +234,13 @@ HexagonBlockRanges::RegisterSet HexagonBlockRanges::getLiveIns(
   RegisterSet LiveIns;
   RegisterSet Tmp;
   for (auto I : B.liveins()) {
-    if (I.LaneMask == ~LaneBitmask(0)) {
+    if (I.LaneMask.all()) {
       Tmp.insert({I.PhysReg,0});
       continue;
     }
     for (MCSubRegIndexIterator S(I.PhysReg, &TRI); S.isValid(); ++S) {
       LaneBitmask M = TRI.getSubRegIndexLaneMask(S.getSubRegIndex());
-      if (M & I.LaneMask)
+      if (!(M & I.LaneMask).none())
         Tmp.insert({S.getSubReg(), 0});
     }
   }