Fix a ton of comment typos found by codespell. Patch by

[oota-llvm.git] / lib / CodeGen / SelectionDAG / SelectionDAGBuilder.cpp

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index f751bb708e7ad59876b32036df42078126bc4640..4178a4a350a8cf74a3244b819960d9131ff29b79 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -2019,9 +2019,13 @@ bool SelectionDAGBuilder::handleBTSplitSwitchCase(CaseRec& CR,
     APInt Range = ComputeRange(LEnd, RBegin);
     assert((Range - 2ULL).isNonNegative() &&
            "Invalid case distance");
-    double LDensity = (double)LSize.roundToDouble() /
+    // Use volatile double here to avoid excess precision issues on some hosts,
+    // e.g. that use 80-bit X87 registers.
+    volatile double LDensity =
+       (double)LSize.roundToDouble() /
                            (LEnd - First + 1ULL).roundToDouble();
-    double RDensity = (double)RSize.roundToDouble() /
+    volatile double RDensity =
+      (double)RSize.roundToDouble() /
                            (Last - RBegin + 1ULL).roundToDouble();
     double Metric = Range.logBase2()*(LDensity+RDensity);
     // Should always split in some non-trivial place
@@ -6193,7 +6197,7 @@ TargetLowering::LowerCallTo(SDValue Chain, const Type *RetTy,
 
   // For a function returning void, there is no return value. We can't create
   // such a node, so we just return a null return value in that case. In
-  // that case, nothing will actualy look at the value.
+  // that case, nothing will actually look at the value.
   if (ReturnValues.empty())
     return std::make_pair(SDValue(), Chain);
 
@@ -6409,7 +6413,7 @@ void SelectionDAGISel::LowerArguments(const BasicBlock *LLVMBB) {
       SDB->setValue(I, Res);
 
       // If this argument is live outside of the entry block, insert a copy from
-      // whereever we got it to the vreg that other BB's will reference it as.
+      // wherever we got it to the vreg that other BB's will reference it as.
       SDB->CopyToExportRegsIfNeeded(I);
     }
   }