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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

llvm-svn: 169188
This commit is contained in:
Jakob Stoklund Olesen 2012-12-04 00:30:22 +00:00
parent 4c21a13abd
commit d099763751
3 changed files with 11 additions and 4 deletions
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4
include/llvm/CodeGen/VirtRegMap.h
View File

@ -130,9 +130,7 @@ namespace llvm {
unsigned getRegAllocPref(unsigned virtReg);
/// @brief returns true if VirtReg is assigned to its preferred physreg.
bool hasPreferredPhys(unsigned VirtReg) {
return getPhys(VirtReg) == getRegAllocPref(VirtReg);
}
bool hasPreferredPhys(unsigned VirtReg);
/// @brief returns true if VirtReg has a known preferred register.
/// This returns false if VirtReg has a preference that is a virtual

2
lib/CodeGen/RegAllocPBQP.cpp
View File

@ -526,7 +526,7 @@ void RegAllocPBQP::finalizeAlloc() const {
itr != end; ++itr) {
LiveInterval *li = &lis->getInterval(*itr);
unsigned physReg = vrm->getRegAllocPref(li->reg);
unsigned physReg = mri->getSimpleHint(li->reg);
if (physReg == 0) {
const TargetRegisterClass *liRC = mri->getRegClass(li->reg);

9
lib/CodeGen/VirtRegMap.cpp
View File

@ -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))