Resurrect the assertion removed by r227717
Summary: MSVC can compile "LoopID->getOperand(0) == LoopID" when LoopID is MDNode*.
Test Plan: no regression
Reviewers: mkuper
Subscribers: jholewinski, llvm-commits
Differential Revision: http://reviews.llvm.org/D7327
llvm-svn: 227853
diff --git a/llvm/lib/Transforms/Utils/LoopUnroll.cpp b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
index 0ee2fee..accb731 100644
--- a/llvm/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
@@ -553,16 +553,17 @@
/// Given an llvm.loop loop id metadata node, returns the loop hint metadata
/// node with the given name (for example, "llvm.loop.unroll.count"). If no
/// such metadata node exists, then nullptr is returned.
-const MDNode *llvm::GetUnrollMetadata(const MDNode *LoopID, StringRef Name) {
+MDNode *llvm::GetUnrollMetadata(MDNode *LoopID, StringRef Name) {
// First operand should refer to the loop id itself.
assert(LoopID->getNumOperands() > 0 && "requires at least one operand");
+ assert(LoopID->getOperand(0) == LoopID && "invalid loop id");
for (unsigned i = 1, e = LoopID->getNumOperands(); i < e; ++i) {
- const MDNode *MD = dyn_cast<MDNode>(LoopID->getOperand(i));
+ MDNode *MD = dyn_cast<MDNode>(LoopID->getOperand(i));
if (!MD)
continue;
- const MDString *S = dyn_cast<MDString>(MD->getOperand(0));
+ MDString *S = dyn_cast<MDString>(MD->getOperand(0));
if (!S)
continue;