[llvm] 8a24e0c - [nfc][mlgo] Lazily compute the regalloc reward
Mircea Trofin via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 26 15:35:22 PDT 2022
Author: Mircea Trofin
Date: 2022-09-26T15:34:29-07:00
New Revision: 8a24e0cb5aeecef63fb77830e437bcc116985af1
URL: https://github.com/llvm/llvm-project/commit/8a24e0cb5aeecef63fb77830e437bcc116985af1
DIFF: https://github.com/llvm/llvm-project/commit/8a24e0cb5aeecef63fb77830e437bcc116985af1.diff
LOG: [nfc][mlgo] Lazily compute the regalloc reward
Differential Revision: https://reviews.llvm.org/D134664
Added:
Modified:
llvm/lib/CodeGen/MLRegallocEvictAdvisor.cpp
llvm/lib/CodeGen/RegAllocEvictionAdvisor.h
llvm/lib/CodeGen/RegAllocPriorityAdvisor.h
Removed:
################################################################################
diff --git a/llvm/lib/CodeGen/MLRegallocEvictAdvisor.cpp b/llvm/lib/CodeGen/MLRegallocEvictAdvisor.cpp
index 86c28ab0d309c..e48aac4136d8e 100644
--- a/llvm/lib/CodeGen/MLRegallocEvictAdvisor.cpp
+++ b/llvm/lib/CodeGen/MLRegallocEvictAdvisor.cpp
@@ -461,9 +461,10 @@ class DevelopmentModeEvictionAdvisorAnalysis final
return I->second.get();
}
- void logRewardIfNeeded(const MachineFunction &MF, float Reward) override {
+ void logRewardIfNeeded(const MachineFunction &MF,
+ llvm::function_ref<float()> GetReward) override {
if (auto *Log = this->getLogger(MF))
- Log->logFloatFinalReward(Reward);
+ Log->logFloatFinalReward(GetReward());
}
private:
@@ -1067,13 +1068,19 @@ int64_t DevelopmentModeEvictAdvisor::tryFindEvictionCandidatePosition(
}
bool RegAllocScoring::runOnMachineFunction(MachineFunction &MF) {
- float Reward = static_cast<float>(
- calculateRegAllocScore(MF, getAnalysis<MachineBlockFrequencyInfo>())
- .getScore());
-
- getAnalysis<RegAllocEvictionAdvisorAnalysis>().logRewardIfNeeded(MF, Reward);
- getAnalysis<RegAllocPriorityAdvisorAnalysis>().logRewardIfNeeded(MF, Reward);
-
+ Optional<float> CachedReward;
+ auto GetReward = [&]() {
+ if (!CachedReward)
+ CachedReward = static_cast<float>(
+ calculateRegAllocScore(MF, getAnalysis<MachineBlockFrequencyInfo>())
+ .getScore());
+ return *CachedReward;
+ };
+
+ getAnalysis<RegAllocEvictionAdvisorAnalysis>().logRewardIfNeeded(MF,
+ GetReward);
+ getAnalysis<RegAllocPriorityAdvisorAnalysis>().logRewardIfNeeded(MF,
+ GetReward);
return false;
}
#endif // #ifdef LLVM_HAVE_TF_API
diff --git a/llvm/lib/CodeGen/RegAllocEvictionAdvisor.h b/llvm/lib/CodeGen/RegAllocEvictionAdvisor.h
index c7f48bc9ea9d7..a3936eacf560c 100644
--- a/llvm/lib/CodeGen/RegAllocEvictionAdvisor.h
+++ b/llvm/lib/CodeGen/RegAllocEvictionAdvisor.h
@@ -177,7 +177,8 @@ class RegAllocEvictionAdvisorAnalysis : public ImmutablePass {
virtual std::unique_ptr<RegAllocEvictionAdvisor>
getAdvisor(const MachineFunction &MF, const RAGreedy &RA) = 0;
AdvisorMode getAdvisorMode() const { return Mode; }
- virtual void logRewardIfNeeded(const MachineFunction &MF, float Reward){};
+ virtual void logRewardIfNeeded(const MachineFunction &MF,
+ llvm::function_ref<float()> GetReward){};
protected:
// This analysis preserves everything, and subclasses may have additional
diff --git a/llvm/lib/CodeGen/RegAllocPriorityAdvisor.h b/llvm/lib/CodeGen/RegAllocPriorityAdvisor.h
index 520d8d836fe47..1e9fa967214cc 100644
--- a/llvm/lib/CodeGen/RegAllocPriorityAdvisor.h
+++ b/llvm/lib/CodeGen/RegAllocPriorityAdvisor.h
@@ -68,7 +68,8 @@ class RegAllocPriorityAdvisorAnalysis : public ImmutablePass {
virtual std::unique_ptr<RegAllocPriorityAdvisor>
getAdvisor(const MachineFunction &MF, const RAGreedy &RA) = 0;
AdvisorMode getAdvisorMode() const { return Mode; }
- virtual void logRewardIfNeeded(const MachineFunction &MF, float Reward){};
+ virtual void logRewardIfNeeded(const MachineFunction &MF,
+ llvm::function_ref<float()> GetReward){};
protected:
// This analysis preserves everything, and subclasses may have additional
More information about the llvm-commits
mailing list