If we see:
%A = alloca int
%V = load int* %A
value number %V to undef, not 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19905 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/LoadValueNumbering.cpp b/lib/Analysis/LoadValueNumbering.cpp
index 67d675f..d69f83e 100644
--- a/lib/Analysis/LoadValueNumbering.cpp
+++ b/lib/Analysis/LoadValueNumbering.cpp
@@ -22,7 +22,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Analysis/LoadValueNumbering.h"
-#include "llvm/Constant.h"
+#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/Pass.h"
@@ -357,11 +357,10 @@
Instrs.erase(I);
} else if (AllocationInst *AI = dyn_cast<AllocationInst>(I)) {
// If we run into an allocation of the value being loaded, then the
- // contenxt are not initialized. We can return any value, so we will
- // return a zero.
+ // contents are not initialized.
if (Allocations.count(AI)) {
LoadInvalidatedInBBBefore = true;
- RetVals.push_back(Constant::getNullValue(LI->getType()));
+ RetVals.push_back(UndefValue::get(LI->getType()));
break;
}
}