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Minor cleanup. EvictionCost ctor was confusing relative to the other costs floating around in the code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195489 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick 2013-11-22 19:07:38 +00:00
parent ed20bf5ef8
commit 833a9e9395
1 changed files with 9 additions and 3 deletions
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12
lib/CodeGen/RegAllocGreedy.cpp
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@ -160,10 +160,14 @@ class RAGreedy : public MachineFunctionPass,
unsigned BrokenHints; ///< Total number of broken hints.
float MaxWeight; ///< Maximum spill weight evicted.
EvictionCost(unsigned B = 0) : BrokenHints(B), MaxWeight(0) {}
EvictionCost(): BrokenHints(0), MaxWeight(0) {}
bool isMax() const { return BrokenHints == ~0u; }
void setMax() { BrokenHints = ~0u; }
void setBrokenHints(unsigned NHints) { BrokenHints = NHints; }
bool operator<(const EvictionCost &O) const {
if (BrokenHints != O.BrokenHints)
return BrokenHints < O.BrokenHints;
@ -471,7 +475,8 @@ unsigned RAGreedy::tryAssign(LiveInterval &VirtReg,
if (unsigned Hint = MRI->getSimpleHint(VirtReg.reg))
if (Order.isHint(Hint)) {
DEBUG(dbgs() << "missed hint " << PrintReg(Hint, TRI) << '\n');
EvictionCost MaxCost(1);
EvictionCost MaxCost;
MaxCost.setBrokenHints(1);
if (canEvictInterference(VirtReg, Hint, true, MaxCost)) {
evictInterference(VirtReg, Hint, NewVRegs);
return Hint;
@ -685,7 +690,8 @@ unsigned RAGreedy::tryEvict(LiveInterval &VirtReg,
NamedRegionTimer T("Evict", TimerGroupName, TimePassesIsEnabled);
// Keep track of the cheapest interference seen so far.
EvictionCost BestCost(~0u);
EvictionCost BestCost;
BestCost.setMax();
unsigned BestPhys = 0;
unsigned OrderLimit = Order.getOrder().size();