Change a place to use an arbitrary value instead of null, when possible
llvm-svn: 22605
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index c060127..d8ede27 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -849,13 +849,13 @@
while (!BB->empty()) {
Instruction &I = BB->back();
// If this instruction is used, replace uses with an arbitrary
- // constant value. Because control flow can't get here, we don't care
+ // value. Because control flow can't get here, we don't care
// what we replace the value with. Note that since this block is
// unreachable, and all values contained within it must dominate their
// uses, that all uses will eventually be removed.
if (!I.use_empty())
- // Make all users of this instruction reference the constant instead
- I.replaceAllUsesWith(Constant::getNullValue(I.getType()));
+ // Make all users of this instruction use undef instead
+ I.replaceAllUsesWith(UndefValue::get(I.getType()));
// Remove the instruction from the basic block
BB->getInstList().pop_back();