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Use MRI::getSimpleHint() instead of getRegAllocPref() in remaining cases.

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Targets can provide multiple hints now, so getRegAllocPref() doesn't
make sense any longer because it only returns one preferred register.
Replace it with getSimpleHint() in the remaining heuristics. This
function only

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169188 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-12-04 00:30:22 +00:00
parent dc8126bbb8
commit 980bddfb1c
3 changed files with 11 additions and 4 deletions
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lib/CodeGen/VirtRegMap.cpp
+9
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@@ -88,6 +88,15 @@ unsigned VirtRegMap::getRegAllocPref(unsigned virtReg) {
return TRI->ResolveRegAllocHint(Hint.first, physReg, *MF);
}
bool VirtRegMap::hasPreferredPhys(unsigned VirtReg) {
unsigned Hint = MRI->getSimpleHint(VirtReg);
if (!Hint)
return 0;
if (TargetRegisterInfo::isVirtualRegister(Hint))
Hint = getPhys(Hint);
return getPhys(VirtReg) == Hint;
}
bool VirtRegMap::hasKnownPreference(unsigned VirtReg) {
std::pair<unsigned, unsigned> Hint = MRI->getRegAllocationHint(VirtReg);
if (TargetRegisterInfo::isPhysicalRegister(Hint.second))