[LPM] Fix a logic error in LICM spotted by inspection.
We completely skipped promotion in LICM if the loop has a preheader or dedicated exits, but not *both*. We hoist if there is a preheader, and sink if there are dedicated exits, but either hoisting or sinking can move loop invariant code out of the loop! I have no idea if this has a practical consequence. If anyone has ideas for a test case, let me know. llvm-svn: 199966
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@ -273,7 +273,7 @@ bool LICM::runOnLoop(Loop *L, LPPassManager &LPM) {
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// Now that all loop invariants have been removed from the loop, promote any
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// memory references to scalars that we can.
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if (!DisablePromotion && Preheader && L->hasDedicatedExits()) {
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if (!DisablePromotion && (Preheader || L->hasDedicatedExits())) {
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SmallVector<BasicBlock *, 8> ExitBlocks;
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SmallVector<Instruction *, 8> InsertPts;
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