Use MRI::getSimpleHint() instead of getRegAllocPref() in remaining cases.
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
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp
index dcfad66..820eed0 100644
--- a/lib/CodeGen/VirtRegMap.cpp
+++ b/lib/CodeGen/VirtRegMap.cpp
@@ -88,6 +88,15 @@
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))