ADd support for undef and unreachable
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17050 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp
index fd5f671..247da62 100644
--- a/lib/Target/PowerPC/PPC32ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp
@@ -237,9 +237,10 @@
// Visitation methods for various instructions. These methods simply emit
// fixed PowerPC code for each instruction.
- // Control flow operators
+ // Control flow operators.
void visitReturnInst(ReturnInst &RI);
void visitBranchInst(BranchInst &BI);
+ void visitUnreachableInst(UnreachableInst &UI) {}
struct ValueRecord {
Value *Val;
@@ -575,6 +576,10 @@
void PPC32ISel::copyConstantToRegister(MachineBasicBlock *MBB,
MachineBasicBlock::iterator IP,
Constant *C, unsigned R) {
+ if (isa<UndefValue>(C)) {
+ BuildMI(*MBB, IP, PPC::IMPLICIT_DEF, 0, R);
+ return;
+ }
if (C->getType()->isIntegral()) {
unsigned Class = getClassB(C->getType());
@@ -2117,9 +2122,8 @@
// xor X, -1 -> not X
if (Opcode == 4) {
- ConstantSInt *CSI = dyn_cast<ConstantSInt>(Op1);
- ConstantUInt *CUI = dyn_cast<ConstantUInt>(Op1);
- if ((CSI && CSI->isAllOnesValue()) || (CUI && CUI->isAllOnesValue())) {
+ ConstantInt *CI = dyn_cast<ConstantSInt>(Op1);
+ if (CI && CI->isAllOnesValue()) {
BuildMI(*MBB, IP, PPC::NOR, 2, DestReg).addReg(Op0Reg).addReg(Op0Reg);
return;
}