[llvm] Introduce CounterExpressionBuilder::replace(C, Map) (PR #112698)
NAKAMURA Takumi via llvm-commits
llvm-commits at lists.llvm.org
Thu Oct 17 05:09:26 PDT 2024
https://github.com/chapuni created https://github.com/llvm/llvm-project/pull/112698
This return a counter for each term in the expression replaced by ReplaceMap.
At the moment, this doesn't update the Map, so Map is marked as `const`.
>From 618e63946923a460b2684738e636c77b1706322a Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic at gmail.com>
Date: Thu, 17 Oct 2024 01:22:54 +0900
Subject: [PATCH] Introduce CounterExpressionBuilder::replace(C, Map)
This return a counter for each term in the expression replaced by
ReplaceMap.
At the moment, this doesn't update the Map, so Map is marked as `const`.
---
.../ProfileData/Coverage/CoverageMapping.h | 6 ++++
.../ProfileData/Coverage/CoverageMapping.cpp | 32 +++++++++++++++++++
2 files changed, 38 insertions(+)
diff --git a/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h b/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
index fa07b3a9e8b14f..d6528bd407ef34 100644
--- a/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
+++ b/llvm/include/llvm/ProfileData/Coverage/CoverageMapping.h
@@ -34,6 +34,7 @@
#include <cassert>
#include <cstdint>
#include <iterator>
+#include <map>
#include <memory>
#include <sstream>
#include <string>
@@ -213,6 +214,11 @@ class CounterExpressionBuilder {
/// Return a counter that represents the expression that subtracts RHS from
/// LHS.
Counter subtract(Counter LHS, Counter RHS, bool Simplify = true);
+
+ using ReplaceMap = std::map<Counter, Counter>;
+
+ /// Return a counter for each term in the expression replaced by ReplaceMap.
+ Counter replace(Counter C, const ReplaceMap &Map);
};
using LineColPair = std::pair<unsigned, unsigned>;
diff --git a/llvm/lib/ProfileData/Coverage/CoverageMapping.cpp b/llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
index c713371da81e40..b50f025d261e13 100644
--- a/llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
+++ b/llvm/lib/ProfileData/Coverage/CoverageMapping.cpp
@@ -135,6 +135,38 @@ Counter CounterExpressionBuilder::subtract(Counter LHS, Counter RHS,
return Simplify ? simplify(Cnt) : Cnt;
}
+Counter CounterExpressionBuilder::replace(Counter C, const ReplaceMap &Map) {
+ auto I = Map.find(C);
+
+ // Replace C with the Map even if C is Expression.
+ if (I != Map.end())
+ return I->second;
+
+ // Traverse only Expression.
+ if (!C.isExpression())
+ return C;
+
+ auto CE = Expressions[C.getExpressionID()];
+ auto NewLHS = replace(CE.LHS, Map);
+ auto NewRHS = replace(CE.RHS, Map);
+
+ // Reconstruct Expression with induced subexpressions.
+ switch (CE.Kind) {
+ case CounterExpression::Add:
+ C = add(NewLHS, NewRHS);
+ break;
+ case CounterExpression::Subtract:
+ C = subtract(NewLHS, NewRHS);
+ break;
+ }
+
+ // Reconfirm if the reconstructed expression would hit the Map.
+ if ((I = Map.find(C)) != Map.end())
+ return I->second;
+
+ return C;
+}
+
void CounterMappingContext::dump(const Counter &C, raw_ostream &OS) const {
switch (C.getKind()) {
case Counter::Zero:
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