Implement null and undef values for FastISel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55500 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 9fa37b1..33da2b0 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -31,6 +31,8 @@
if (CI->getValue().getActiveBits() > 64)
return 0;
Reg = FastEmit_i(VT, VT, ISD::Constant, CI->getZExtValue());
+ } else if (isa<ConstantPointerNull>(V)) {
+ Reg = FastEmit_i(VT, VT, ISD::Constant, 0);
} else if (ConstantFP *CF = dyn_cast<ConstantFP>(V)) {
Reg = FastEmit_f(VT, VT, ISD::ConstantFP, CF);
@@ -53,6 +55,9 @@
if (Reg == 0)
return 0;
}
+ } else if (isa<UndefValue>(V)) {
+ Reg = createResultReg(TLI.getRegClassFor(VT));
+ BuildMI(MBB, TII.get(TargetInstrInfo::IMPLICIT_DEF), Reg);
}
return Reg;