Update llvm to trunk r256633.

1 files changed, 8 insertions, 7 deletions

diff --git a/contrib/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp b/contrib/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp
index 096da94..64a2b6c 100644
--- a/contrib/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp
+++ b/contrib/llvm/lib/Target/Hexagon/HexagonGenInsert.cpp
@@ -77,9 +77,8 @@ namespace {
 namespace {
   // Set of virtual registers, based on BitVector.
   struct RegisterSet : private BitVector {
-    RegisterSet() : BitVector() {}
+    RegisterSet() = default;
     explicit RegisterSet(unsigned s, bool t = false) : BitVector(s, t) {}
-    RegisterSet(const RegisterSet &RS) : BitVector(RS) {}
 
     using BitVector::clear;
 
@@ -1496,7 +1495,7 @@ bool HexagonGenInsert::runOnMachineFunction(MachineFunction &MF) {
   // version of DCE that preserves lifetime markers. Without it, merging
   // of stack objects can fail to recognize and merge disjoint objects
   // leading to unnecessary stack growth.
-  Changed |= removeDeadCode(MDT->getRootNode());
+  Changed = removeDeadCode(MDT->getRootNode());
 
   const HexagonEvaluator HE(*HRI, *MRI, *HII, MF);
   BitTracker BTLoc(HE, MF);
@@ -1534,7 +1533,7 @@ bool HexagonGenInsert::runOnMachineFunction(MachineFunction &MF) {
   }
 
   if (IFMap.empty())
-    return false;
+    return Changed;
 
   {
     NamedRegionTimer _T("pruning", "hexinsert", TimingDetail);
@@ -1547,7 +1546,7 @@ bool HexagonGenInsert::runOnMachineFunction(MachineFunction &MF) {
   }
 
   if (IFMap.empty())
-    return false;
+    return Changed;
 
   {
     NamedRegionTimer _T("selection", "hexinsert", TimingDetail);
@@ -1572,13 +1571,15 @@ bool HexagonGenInsert::runOnMachineFunction(MachineFunction &MF) {
     for (unsigned i = 0, n = Out.size(); i < n; ++i)
       IFMap.erase(Out[i]);
   }
+  if (IFMap.empty())
+    return Changed;
 
   {
     NamedRegionTimer _T("generation", "hexinsert", TimingDetail);
-    Changed = generateInserts();
+    generateInserts();
   }
 
-  return Changed;
+  return true;
 }