226d385269
The commit in question causes miscompiliation of VirtualBox. Efforts to create a reproducer are underway, but quite complicated. Submitted by: kevans Sponsored by: DARPA
16 lines
835 B
Text
16 lines
835 B
Text
--- lib/CodeGen/Analysis.cpp.orig 2020-03-26 15:48:08 UTC
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+++ lib/CodeGen/Analysis.cpp
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@@ -538,11 +538,10 @@ bool llvm::isInTailCallPosition(ImmutableCallSite CS,
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// Debug info intrinsics do not get in the way of tail call optimization.
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if (isa<DbgInfoIntrinsic>(BBI))
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continue;
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- // A lifetime end or assume intrinsic should not stop tail call
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+ // An assume intrinsic should not stop tail call
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// optimization.
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if (const IntrinsicInst *II = dyn_cast<IntrinsicInst>(BBI))
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- if (II->getIntrinsicID() == Intrinsic::lifetime_end ||
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- II->getIntrinsicID() == Intrinsic::assume)
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+ if (II->getIntrinsicID() == Intrinsic::assume)
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continue;
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if (BBI->mayHaveSideEffects() || BBI->mayReadFromMemory() ||
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!isSafeToSpeculativelyExecute(&*BBI))
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