[SelectionDAG] ComputeNumSignBits - clang-format + improve *EXTLOAD c…

…omments. NFCI. Pre-commit requested for D62777. llvm-svn: 362485
llvm · Jun 4, 2019 · 3178546 · 3178546
1 parent 5d5078e
commit 3178546
Showing 1 changed file with 7 additions and 7 deletions.
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -3878,13 +3878,13 @@ unsigned SelectionDAG::ComputeNumSignBits(SDValue Op, const APInt &DemandedElts,
     if (LoadSDNode *LD = dyn_cast<LoadSDNode>(Op)) {
       unsigned ExtType = LD->getExtensionType();
       switch (ExtType) {
-        default: break;
-        case ISD::SEXTLOAD:    // '17' bits known
-          Tmp = LD->getMemoryVT().getScalarSizeInBits();
-          return VTBits-Tmp+1;
-        case ISD::ZEXTLOAD:    // '16' bits known
-          Tmp = LD->getMemoryVT().getScalarSizeInBits();
-          return VTBits-Tmp;
+      default: break;
+      case ISD::SEXTLOAD: // e.g. i16->i32 = '17' bits known.
+        Tmp = LD->getMemoryVT().getScalarSizeInBits();
+        return VTBits - Tmp + 1;
+      case ISD::ZEXTLOAD: // e.g. i16->i32 = '16' bits known.
+        Tmp = LD->getMemoryVT().getScalarSizeInBits();
+        return VTBits - Tmp;
       }
     }
   }