Simplify some more getAliasSet callers.
MCRegAliasIterator can include Reg itself in the list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157848 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp
index b383222..8a22e63 100644
--- a/lib/CodeGen/RegAllocFast.cpp
+++ b/lib/CodeGen/RegAllocFast.cpp
@@ -711,13 +711,10 @@
if (!MO.isReg() || !MO.isDef()) continue;
unsigned Reg = MO.getReg();
if (!Reg || !TargetRegisterInfo::isPhysicalRegister(Reg)) continue;
- UsedInInstr.set(Reg);
- if (ThroughRegs.count(PhysRegState[Reg]))
- definePhysReg(MI, Reg, regFree);
- for (const uint16_t *AS = TRI->getAliasSet(Reg); *AS; ++AS) {
- UsedInInstr.set(*AS);
- if (ThroughRegs.count(PhysRegState[*AS]))
- definePhysReg(MI, *AS, regFree);
+ for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) {
+ UsedInInstr.set(*AI);
+ if (ThroughRegs.count(PhysRegState[*AI]))
+ definePhysReg(MI, *AI, regFree);
}
}
@@ -1036,9 +1033,8 @@
if (!Reg || !TargetRegisterInfo::isPhysicalRegister(Reg)) continue;
// Look for physreg defs and tied uses.
if (!MO.isDef() && !MI->isRegTiedToDefOperand(i)) continue;
- UsedInInstr.set(Reg);
- for (const uint16_t *AS = TRI->getAliasSet(Reg); *AS; ++AS)
- UsedInInstr.set(*AS);
+ for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI)
+ UsedInInstr.set(*AI);
}
}