Follow up to 90488. Turn a check into an assertion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90815 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 3f4a928..12b974d 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1064,8 +1064,8 @@
unsigned MachineInstr::isConstantValuePHI() const {
if (getOpcode() != TargetInstrInfo::PHI)
return 0;
- if (getNumOperands() <= 1)
- return 0;
+ assert(getNumOperands() >= 3 &&
+ "It's illegal to have a PHI without source operands");
unsigned Reg = getOperand(1).getReg();
for (unsigned i = 3, e = getNumOperands(); i < e; i += 2)