maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[AggressiveAntiDepBreaker] Skip some unnecessary BitVector copies. 

llvm-svn: 260825
This commit is contained in:
Benjamin Kramer 2016-02-13 16:39:39 +00:00
parent 8a752e316d
commit 7f75e9403d
1 changed files with 10 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp
View File

@ -563,13 +563,16 @@ bool AggressiveAntiDepBreaker::FindSuitableFreeRegisters(
if (RegRefs.count(Reg) > 0) {
DEBUG(dbgs() << "\t\t" << TRI->getName(Reg) << ":");
BitVector BV = GetRenameRegisters(Reg);
RenameRegisterMap.insert(std::pair<unsigned, BitVector>(Reg, BV));
BitVector &BV = RenameRegisterMap[Reg];
assert(BV.empty());
BV = GetRenameRegisters(Reg);
DEBUG(dbgs() << " ::");
DEBUG(for (int r = BV.find_first(); r != -1; r = BV.find_next(r))
dbgs() << " " << TRI->getName(r));
DEBUG(dbgs() << "\n");
DEBUG({
dbgs() << " ::";
for (int r = BV.find_first(); r != -1; r = BV.find_next(r))
dbgs() << " " << TRI->getName(r);
dbgs() << "\n";
});
}
}
@ -650,8 +653,7 @@ bool AggressiveAntiDepBreaker::FindSuitableFreeRegisters(
DEBUG(dbgs() << " " << TRI->getName(NewReg));
// Check if Reg can be renamed to NewReg.
BitVector BV = RenameRegisterMap[Reg];
if (!BV.test(NewReg)) {
if (!RenameRegisterMap[Reg].test(NewReg)) {
DEBUG(dbgs() << "(no rename)");
goto next_super_reg;
}