Switch this to use SmallSet to avoid mallocs in the common case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33457 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp
index 1d1f6f7..8fb26a9 100644
--- a/lib/CodeGen/VirtRegMap.cpp
+++ b/lib/CodeGen/VirtRegMap.cpp
@@ -29,8 +29,8 @@
#include "llvm/Support/Compiler.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallSet.h"
#include <algorithm>
-#include <set>
using namespace llvm;
STATISTIC(NumSpills, "Number of register spills");
@@ -471,7 +471,7 @@
unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI,
AvailableSpills &Spills,
std::map<int, MachineInstr*> &MaybeDeadStores,
- std::set<unsigned> &Rejected) {
+ SmallSet<unsigned, 8> &Rejected) {
if (Reuses.empty()) return PhysReg; // This is most often empty.
for (unsigned ro = 0, e = Reuses.size(); ro != e; ++ro) {
@@ -553,7 +553,7 @@
unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI,
AvailableSpills &Spills,
std::map<int, MachineInstr*> &MaybeDeadStores) {
- std::set<unsigned> Rejected;
+ SmallSet<unsigned, 8> Rejected;
return GetRegForReload(PhysReg, MI, Spills, MaybeDeadStores, Rejected);
}
};