Precompute block frequencies, pow() isn't free.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126975 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SpillPlacement.h b/lib/CodeGen/SpillPlacement.h
index ef2d516..b0135cb 100644
--- a/lib/CodeGen/SpillPlacement.h
+++ b/lib/CodeGen/SpillPlacement.h
@@ -27,6 +27,7 @@
#ifndef LLVM_CODEGEN_SPILLPLACEMENT_H
#define LLVM_CODEGEN_SPILLPLACEMENT_H
+#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
namespace llvm {
@@ -35,7 +36,6 @@
class EdgeBundles;
class MachineBasicBlock;
class MachineLoopInfo;
-template <typename> class SmallVectorImpl;
class SpillPlacement : public MachineFunctionPass {
struct Node;
@@ -48,6 +48,9 @@
// caller.
BitVector *ActiveNodes;
+ // Block frequencies are computed once. Indexed by block number.
+ SmallVector<float, 4> BlockFrequency;
+
public:
static char ID; // Pass identification, replacement for typeid.
@@ -91,7 +94,9 @@
/// getBlockFrequency - Return the estimated block execution frequency per
/// function invocation.
- float getBlockFrequency(const MachineBasicBlock*);
+ float getBlockFrequency(unsigned Number) const {
+ return BlockFrequency[Number];
+ }
private:
virtual bool runOnMachineFunction(MachineFunction&);