From 40a42a2ccaaa19a109667ed7abf224cc8733cd9c Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Fri, 4 Mar 2011 00:58:40 +0000 Subject: Precompute block frequencies, pow() isn't free. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126975 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SpillPlacement.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'lib/CodeGen/SpillPlacement.h') diff --git a/lib/CodeGen/SpillPlacement.h b/lib/CodeGen/SpillPlacement.h index ef2d516cdc..b0135cbc36 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 BitVector; class EdgeBundles; class MachineBasicBlock; class MachineLoopInfo; -template class SmallVectorImpl; class SpillPlacement : public MachineFunctionPass { struct Node; @@ -48,6 +48,9 @@ class SpillPlacement : public MachineFunctionPass { // caller. BitVector *ActiveNodes; + // Block frequencies are computed once. Indexed by block number. + SmallVector BlockFrequency; + public: static char ID; // Pass identification, replacement for typeid. @@ -91,7 +94,9 @@ public: /// 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&); -- cgit v1.2.3