shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity

misched: copy comments so compareRPDelta is readable by itself.

Browse Source 
llvm-svn: 157424
This commit is contained in:
Andrew Trick 2012-05-24 22:11:01 +00:00
parent d5326aea81
commit f378617773
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
llvm/lib/CodeGen/MachineScheduler.cpp
View File

@ -815,19 +815,22 @@ static bool compareRPDelta(const RegPressureDelta &LHS,
// Compare each component of pressure in decreasing order of importance
// without checking if any are valid. Invalid PressureElements are assumed to
// have UnitIncrease==0, so are neutral.
// Avoid increasing the max critical pressure in the scheduled region.
if (LHS.Excess.UnitIncrease != RHS.Excess.UnitIncrease)
return LHS.Excess.UnitIncrease < RHS.Excess.UnitIncrease;
// Avoid increasing the max critical pressure in the scheduled region.
if (LHS.CriticalMax.UnitIncrease != RHS.CriticalMax.UnitIncrease)
return LHS.CriticalMax.UnitIncrease < RHS.CriticalMax.UnitIncrease;
// Avoid increasing the max pressure of the entire region.
if (LHS.CurrentMax.UnitIncrease != RHS.CurrentMax.UnitIncrease)
return LHS.CurrentMax.UnitIncrease < RHS.CurrentMax.UnitIncrease;
return false;
}
/// Pick the best candidate from the top queue.
///
/// TODO: getMaxPressureDelta results can be mostly cached for each SUnit during