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LTOInternalize: Use a StringSet instead of a sorted vector and a binary search query for each function 

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266172
This commit is contained in:
Mehdi Amini 2016-04-13 06:32:04 +00:00
parent 11dd31df9a
commit 16fcb418ad
1 changed files with 4 additions and 9 deletions
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13
llvm/lib/LTO/LTOInternalize.cpp
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@ -46,7 +46,7 @@ private:
// Temps
llvm::Mangler Mangler;
std::vector<StringRef> Libcalls;
StringSet<> Libcalls;
// Output
SmallPtrSetImpl<const GlobalValue *> &AsmUsed;
@ -64,7 +64,7 @@ private:
I != E; ++I) {
LibFunc::Func F = static_cast<LibFunc::Func>(I);
if (TLI.has(F))
Libcalls.push_back(TLI.getName(F));
Libcalls.insert(TLI.getName(F));
}
SmallPtrSet<const TargetLowering *, 1> TLSet;
@ -80,12 +80,8 @@ private:
I != E; ++I)
if (const char *Name =
Lowering->getLibcallName(static_cast<RTLIB::Libcall>(I)))
Libcalls.push_back(Name);
Libcalls.insert(Name);
}
array_pod_sort(Libcalls.begin(), Libcalls.end());
Libcalls.erase(std::unique(Libcalls.begin(), Libcalls.end()),
Libcalls.end());
}
void findAsmUses(const GlobalValue &GV) {
@ -108,8 +104,7 @@ private:
// optimizations like -globalopt, causing problems when later optimizations
// add new library calls (e.g., llvm.memset => memset and printf => puts).
// Leave it to the linker to remove any dead code (e.g. with -dead_strip).
if (isa<Function>(GV) &&
std::binary_search(Libcalls.begin(), Libcalls.end(), GV.getName()))
if (isa<Function>(GV) && Libcalls.count(GV.getName()))
AsmUsed.insert(&GV);
}
};