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llvm-dwarfdump: Cache CU low_pc when computing statistics. 

llvm-svn: 370559
This commit is contained in:
David Blaikie 2019-08-31 01:05:46 +00:00
parent ff9bf925e7
commit 09490012af
1 changed files with 6 additions and 6 deletions
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12
llvm/tools/llvm-dwarfdump/Statistics.cpp
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@ -85,7 +85,7 @@ static uint64_t getLowPC(DWARFDie Die) {
}
/// Collect debug info quality metrics for one DIE.
static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
static void collectStatsForDie(DWARFDie Die, uint64_t UnitLowPC, std::string FnPrefix,
std::string VarPrefix, uint64_t ScopeLowPC,
uint64_t BytesInScope, uint32_t InlineDepth,
StringMap<PerFunctionStats> &FnStatMap,
@ -147,7 +147,7 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
BytesCovered += Entry.End - Entry.Begin;
if (List->Entries.size()) {
uint64_t FirstDef = List->Entries[0].Begin;
uint64_t UnitOfs = getLowPC(Die.getDwarfUnit()->getUnitDIE());
uint64_t UnitOfs = UnitLowPC;
// Ranges sometimes start before the lexical scope.
if (UnitOfs + FirstDef >= ScopeLowPC)
OffsetToFirstDefinition = UnitOfs + FirstDef - ScopeLowPC;
@ -210,7 +210,7 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
}
/// Recursively collect debug info quality metrics.
static void collectStatsRecursive(DWARFDie Die, std::string FnPrefix,
static void collectStatsRecursive(DWARFDie Die, uint64_t UnitLowPC, std::string FnPrefix,
std::string VarPrefix, uint64_t ScopeLowPC,
uint64_t BytesInScope, uint32_t InlineDepth,
StringMap<PerFunctionStats> &FnStatMap,
@ -282,7 +282,7 @@ static void collectStatsRecursive(DWARFDie Die, std::string FnPrefix,
}
} else {
// Not a scope, visit the Die itself. It could be a variable.
collectStatsForDie(Die, FnPrefix, VarPrefix, ScopeLowPC, BytesInScope,
collectStatsForDie(Die, UnitLowPC, FnPrefix, VarPrefix, ScopeLowPC, BytesInScope,
InlineDepth, FnStatMap, GlobalStats);
}
@ -300,7 +300,7 @@ static void collectStatsRecursive(DWARFDie Die, std::string FnPrefix,
if (Child.getTag() == dwarf::DW_TAG_lexical_block)
ChildVarPrefix += toHex(LexicalBlockIndex++) + '.';
collectStatsRecursive(Child, FnPrefix, ChildVarPrefix, ScopeLowPC,
collectStatsRecursive(Child, UnitLowPC, FnPrefix, ChildVarPrefix, ScopeLowPC,
BytesInScope, InlineDepth, FnStatMap, GlobalStats);
Child = Child.getSibling();
}
@ -334,7 +334,7 @@ bool collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
StringMap<PerFunctionStats> Statistics;
for (const auto &CU : static_cast<DWARFContext *>(&DICtx)->compile_units())
if (DWARFDie CUDie = CU->getNonSkeletonUnitDIE(false))
collectStatsRecursive(CUDie, "/", "g", 0, 0, 0, Statistics, GlobalStats);
collectStatsRecursive(CUDie, getLowPC(CUDie), "/", "g", 0, 0, 0, Statistics, GlobalStats);
/// The version number should be increased every time the algorithm is changed
/// (including bug fixes). New metrics may be added without increasing the