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Switch this to use SmallSet to avoid mallocs in the common case.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33457 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-01-23 00:59:48 +00:00
parent 89502f0869
commit 08a4d5a343
1 changed files with 3 additions and 3 deletions
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6
lib/CodeGen/VirtRegMap.cpp
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@ -29,8 +29,8 @@
#include "llvm/Support/Compiler.h" #include "llvm/Support/Compiler.h"
#include "llvm/ADT/Statistic.h" #include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h" #include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallSet.h"
#include <algorithm> #include <algorithm>
#include <set>
using namespace llvm; using namespace llvm;
STATISTIC(NumSpills, "Number of register spills"); STATISTIC(NumSpills, "Number of register spills");
@ -471,7 +471,7 @@ namespace {
unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI, unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI,
AvailableSpills &Spills, AvailableSpills &Spills,
std::map<int, MachineInstr*> &MaybeDeadStores, std::map<int, MachineInstr*> &MaybeDeadStores,
std::set<unsigned> &Rejected) { SmallSet<unsigned, 8> &Rejected) {
if (Reuses.empty()) return PhysReg; // This is most often empty. if (Reuses.empty()) return PhysReg; // This is most often empty.
for (unsigned ro = 0, e = Reuses.size(); ro != e; ++ro) { for (unsigned ro = 0, e = Reuses.size(); ro != e; ++ro) {
@ -553,7 +553,7 @@ namespace {
unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI, unsigned GetRegForReload(unsigned PhysReg, MachineInstr *MI,
AvailableSpills &Spills, AvailableSpills &Spills,
std::map<int, MachineInstr*> &MaybeDeadStores) { std::map<int, MachineInstr*> &MaybeDeadStores) {
std::set<unsigned> Rejected; SmallSet<unsigned, 8> Rejected;
return GetRegForReload(PhysReg, MI, Spills, MaybeDeadStores, Rejected); return GetRegForReload(PhysReg, MI, Spills, MaybeDeadStores, Rejected);
} }
}; };