From: Evan Cheng <evan.cheng@apple.com>
Date: Mon, 7 Dec 2009 23:10:34 +0000 (+0000)
Subject: Follow up to 90488. Turn a check into an assertion.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=d8f079c25e8bcaf4d10bfa9c3f6a38cd5ac84329;p=oota-llvm.git

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 3f4a92804c4..12b974d30be 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -1064,8 +1064,8 @@ bool MachineInstr::isInvariantLoad(AliasAnalysis *AA) const {
 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)