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[MemAccessUtils] Add to strip access storage casts

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The new function stripAccessAndAccessStorageCasts is analogous to the
existing function stripAccessAndIdentityCasts but differs in that the
latter uses isAccessStorageIdentityCast whereas the new function uses
isAccessStorageCast.
This commit is contained in:
Nate Chandler
2025-06-03 15:07:43 -07:00
parent 974d179571
commit 33d5c8648b
1 changed files with 16 additions and 0 deletions
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16
include/swift/SIL/MemAccessUtils.h
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@@ -1688,6 +1688,22 @@ inline bool isAccessStorageCast(SingleValueInstruction *svi) {
return isAccessStorageTypeCast(svi) || isAccessStorageIdentityCast(svi);
}
// Strip access markers and casts that preserve the access storage.
//
// Compare to stripAccessAndIdentityCasts. This function strips cast that
// change the type.
inline SILValue stripAccessAndAccessStorageCasts(SILValue v) {
if (auto *bai = dyn_cast<BeginAccessInst>(v)) {
return stripAccessAndAccessStorageCasts(bai->getOperand());
}
if (auto *svi = dyn_cast<SingleValueInstruction>(v)) {
if (isAccessStorageCast(svi)) {
return stripAccessAndAccessStorageCasts(svi->getAllOperands()[0].get());
}
}
return v;
}
/// Abstract CRTP class for a visiting instructions that are part of the use-def
/// chain from an accessed address up to the storage base.
///