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[PGO]: Use efficient 'join' API for uncompressed string 

llvm-svn: 256781
This commit is contained in:
Xinliang David Li 2016-01-04 21:31:09 +00:00
parent 2f5baba613
commit 0c677878d3
1 changed files with 5 additions and 13 deletions
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18
llvm/lib/ProfileData/InstrProf.cpp
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@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/ProfileData/InstrProf.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GlobalVariable.h"
@ -167,18 +168,9 @@ GlobalVariable *createPGOFuncNameVar(Function &F, StringRef FuncName) {
int collectPGOFuncNameStrings(const std::vector<std::string> &NameStrs,
bool doCompression, std::string &Result) {
uint8_t Header[16], *P = Header;
std::string UncompressedNameStrings;
size_t UncompressedStringLen = 0;
std::string UncompressedNameStrings =
join(NameStrs.begin(), NameStrs.end(), StringRef(" "));
for (auto NameStr : NameStrs)
UncompressedStringLen += (NameStr.length() + 1);
UncompressedNameStrings.reserve(UncompressedStringLen + 1);
for (auto NameStr : NameStrs) {
UncompressedNameStrings += NameStr;
UncompressedNameStrings.append(" ");
}
unsigned EncLen = encodeULEB128(UncompressedNameStrings.length(), P);
P += EncLen;
if (!doCompression) {
@ -252,8 +244,8 @@ int readPGOFuncNameStrings(StringRef NameStrings, InstrProfSymtab &Symtab) {
do {
size_t NameStop = NameStrings.find(' ', NameStart);
if (NameStop == StringRef::npos)
return 1;
if (NameStop == NameStrings.size() - 1)
NameStop = NameStrings.size();
if (NameStop >= NameStrings.size() - 1)
isLast = true;
StringRef Name = NameStrings.substr(NameStart, NameStop - NameStart);
Symtab.addFuncName(Name);