Add a static MachineOperand::clobbersPhysReg().
It can be necessary to detach a register mask pointer from its
MachineOperand. This method is convenient for checking clobbered
physregs on a detached bitmask pointer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150261 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/InterferenceCache.cpp b/lib/CodeGen/InterferenceCache.cpp
index 74f67c2..a8a32f3 100644
--- a/lib/CodeGen/InterferenceCache.cpp
+++ b/lib/CodeGen/InterferenceCache.cpp
@@ -106,11 +106,6 @@
return i == e;
}
-// Test if a register mask clobbers PhysReg.
-static inline bool maskClobber(const uint32_t *Mask, unsigned PhysReg) {
- return !(Mask[PhysReg/32] & (1u << PhysReg%32));
-}
-
void InterferenceCache::Entry::update(unsigned MBBNum) {
SlotIndex Start, Stop;
tie(Start, Stop) = Indexes->getMBBRange(MBBNum);
@@ -152,7 +147,7 @@
SlotIndex Limit = BI->First.isValid() ? BI->First : Stop;
for (unsigned i = 0, e = RegMaskSlots.size();
i != e && RegMaskSlots[i] < Limit; ++i)
- if (maskClobber(RegMaskBits[i], PhysReg)) {
+ if (MachineOperand::clobbersPhysReg(RegMaskBits[i], PhysReg)) {
// Register mask i clobbers PhysReg before the LIU interference.
BI->First = RegMaskSlots[i];
break;
@@ -191,7 +186,7 @@
// Also check for register mask interference.
SlotIndex Limit = BI->Last.isValid() ? BI->Last : Start;
for (unsigned i = RegMaskSlots.size(); i && RegMaskSlots[i-1] > Limit; --i)
- if (maskClobber(RegMaskBits[i-1], PhysReg)) {
+ if (MachineOperand::clobbersPhysReg(RegMaskBits[i-1], PhysReg)) {
// Register mask i-1 clobbers PhysReg after the LIU interference.
// Model the regmask clobber as a dead def.
BI->Last = RegMaskSlots[i-1].getDeadSlot();