[ValueTracking] Look through ptrmask intrinsics during getUnderlyingObject.
Reviewers: nlopes, efriedma, hfinkel, sanjoy, aqjune, jdoerfert
Reviewed By: jdoerfert
Subscribers: jdoerfert, hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D61669
llvm-svn: 369036
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index 74c813f..74293db 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -3677,7 +3677,9 @@
return Call->getIntrinsicID() == Intrinsic::launder_invariant_group ||
Call->getIntrinsicID() == Intrinsic::strip_invariant_group ||
Call->getIntrinsicID() == Intrinsic::aarch64_irg ||
- Call->getIntrinsicID() == Intrinsic::aarch64_tagp;
+ Call->getIntrinsicID() == Intrinsic::aarch64_tagp ||
+ (!MustPreserveNullness &&
+ Call->getIntrinsicID() == Intrinsic::ptrmask);
}
/// \p PN defines a loop-variant pointer to an object. Check if the
@@ -3735,7 +3737,7 @@
// because it should be in sync with CaptureTracking. Not using it may
// cause weird miscompilations where 2 aliasing pointers are assumed to
// noalias.
- if (auto *RP = getArgumentAliasingToReturnedPointer(Call, true)) {
+ if (auto *RP = getArgumentAliasingToReturnedPointer(Call, false)) {
V = RP;
continue;
}