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DebugInfo: fix FSPL SILLocation assertion issue #85119

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Merged
merged 1 commit into from
Oct 25, 2025
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DebugInfo: fix FSPL SILLocation assertion issue #85119

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21 changes: 17 additions & 4 deletions lib/SIL/Utils/FieldSensitivePrunedLiveness.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -441,10 +441,23 @@ void TypeTreeLeafTypeRange::constructFilteredProjections(
callback) {
auto *fn = insertPt->getFunction();
SILType type = value->getType();
auto loc =
(insertPt->getLoc().getKind() != SILLocation::ArtificialUnreachableKind)
? insertPt->getLoc()
: RegularLocation::getAutoGeneratedLocation();

// Create a debug location appropriate for synthesizing projection
// instructions that satisfy `SILInstruction::verifyDebugInfo`, while
// trying to preserve debug info when it's valid to do so.
auto projectionLocFrom = [](SILInstruction *orig) -> SILLocation {
auto loc = orig->getLoc();
switch (loc.getKind()) {
case SILLocation::ReturnKind:
case SILLocation::ImplicitReturnKind:
case SILLocation::ArtificialUnreachableKind:
return RegularLocation::getDebugOnlyLocation(loc, orig->getModule());

default:
return loc;
}
};
SILLocation loc = projectionLocFrom(insertPt);

PRUNED_LIVENESS_LOG(llvm::dbgs() << "ConstructFilteredProjection. Bv: "
<< filterBitVector << '\n');
Expand Down