Reserve a goodly amount of room for the vectors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108448 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/lib/CodeGen/AggressiveAntiDepBreaker.cpp
index 50e5ace..8482774 100644
--- a/lib/CodeGen/AggressiveAntiDepBreaker.cpp
+++ b/lib/CodeGen/AggressiveAntiDepBreaker.cpp
@@ -42,6 +42,9 @@
AggressiveAntiDepState::AggressiveAntiDepState(const unsigned TargetRegs,
MachineBasicBlock *BB) :
NumTargetRegs(TargetRegs), GroupNodes(TargetRegs, 0) {
+ GroupNodeIndices.reserve(TargetRegs);
+ KillIndices.reserve(TargetRegs);
+ DefIndices.reserve(TargetRegs);
const unsigned BBSize = BB->size();
for (unsigned i = 0; i < NumTargetRegs; ++i) {
@@ -54,8 +57,7 @@
}
}
-unsigned AggressiveAntiDepState::GetGroup(unsigned Reg)
-{
+unsigned AggressiveAntiDepState::GetGroup(unsigned Reg) {
unsigned Node = GroupNodeIndices[Reg];
while (GroupNodes[Node] != Node)
Node = GroupNodes[Node];