1 files changed, 17 insertions, 11 deletions
diff --git a/lib/Analysis/InstructionSimplify.cpp b/lib/Analysis/InstructionSimplify.cpp
index 16a9a0481c..379a35ad37 100644
--- a/lib/Analysis/InstructionSimplify.cpp
+++ b/lib/Analysis/InstructionSimplify.cpp
@@ -1719,10 +1719,13 @@ static Value *SimplifyICmpInst(unsigned Predicate, Value *LHS, Value *RHS,
         return ConstantInt::get(ITy, false);
 
       // A local identified object (alloca or noalias call) can't equal any
-      // incoming argument, unless they're both null.
-      if (isa<Instruction>(LHSPtr) && isa<Argument>(RHSPtr) &&
-          Pred == CmpInst::ICMP_EQ)
-        return ConstantInt::get(ITy, false);
+      // incoming argument, unless they're both null or they belong to
+      // different functions. The latter happens during inlining.
+      if (Instruction *LHSInst = dyn_cast<Instruction>(LHSPtr))
+        if (Argument *RHSArg = dyn_cast<Argument>(RHSPtr))
+          if (LHSInst->getParent()->getParent() == RHSArg->getParent() &&
+              Pred == CmpInst::ICMP_EQ)
+            return ConstantInt::get(ITy, false);
     }
 
     // Assume that the constant null is on the right.
@@ -1732,14 +1735,17 @@ static Value *SimplifyICmpInst(unsigned Predicate, Value *LHS, Value *RHS,
       else if (Pred == CmpInst::ICMP_NE)
         return ConstantInt::get(ITy, true);
     }
-  } else if (isa<Argument>(LHSPtr)) {
+  } else if (Argument *LHSArg = dyn_cast<Argument>(LHSPtr)) {
     RHSPtr = RHSPtr->stripInBoundsOffsets();
-    // An alloca can't be equal to an argument.
-    if (isa<AllocaInst>(RHSPtr)) {
-      if (Pred == CmpInst::ICMP_EQ)
-        return ConstantInt::get(ITy, false);
-      else if (Pred == CmpInst::ICMP_NE)
-        return ConstantInt::get(ITy, true);
+    // An alloca can't be equal to an argument unless they come from separate
+    // functions via inlining.
+    if (AllocaInst *RHSInst = dyn_cast<AllocaInst>(RHSPtr)) {
+      if (LHSArg->getParent() == RHSInst->getParent()->getParent()) {
+        if (Pred == CmpInst::ICMP_EQ)
+          return ConstantInt::get(ITy, false);
+        else if (Pred == CmpInst::ICMP_NE)
+          return ConstantInt::get(ITy, true);
+      }
     }
   }