[PATCH] D28501: Add an assert for hasLoopInvariantOperands

[Xin Tong via Phabricator via llvm-commits]

trentxintong created this revision.
trentxintong added reviewers: danielcdh, sanjoy.
trentxintong added a subscriber: llvm-commits.
Herald added a subscriber: mzolotukhin.

Add an assert for hasLoopInvariantOperands


https://reviews.llvm.org/D28501

Files:
  lib/Transforms/Scalar/LoopSink.cpp


Index: lib/Transforms/Scalar/LoopSink.cpp
===================================================================
--- lib/Transforms/Scalar/LoopSink.cpp
+++ lib/Transforms/Scalar/LoopSink.cpp
@@ -283,6 +283,9 @@
   // sinked.
   for (auto II = Preheader->rbegin(), E = Preheader->rend(); II != E;) {
     Instruction *I = &*II++;
+    // No need to check for instruction's operands are loop invariant.
+    assert(L.hasLoopInvariantOperands(I) &&
+           "Inst's operands should always be invariant to this loop");
     if (!canSinkOrHoistInst(*I, &AA, &DT, &L, &CurAST, nullptr))
       continue;
     if (sinkInstruction(L, *I, ColdLoopBBs, LoopBlockNumber, LI, DT, BFI))


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