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mangling: support inverse conformance requirement mangling in the old re-mangler

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This is needed to emit ObjC class names for classes inside generic types with e.g. non-copyable requirements.
Fixes a compiler crash in IRGen.

rdar://133333754
This commit is contained in:
Erik Eckstein
2024-08-07 09:52:05 +02:00
parent 29a4b8abff
commit 65ad4ebbdd
2 changed files with 14 additions and 1 deletions
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4
lib/Demangling/OldRemangler.cpp
View File

@@ -3051,5 +3051,7 @@ ManglingError Remangler::mangleHasSymbolQuery(Node *node, unsigned depth) {
ManglingError
Remangler::mangleDependentGenericInverseConformanceRequirement(Node *node,
unsigned depth) {
return MANGLING_ERROR(ManglingError::UnsupportedNodeKind, node);
DEMANGLER_ASSERT(node->getNumChildren() == 2, node);
RETURN_IF_ERROR(mangleConstrainedType(node->getChild(0), depth + 1));
return mangle(node->getChild(1), depth + 1);
}

11
test/IRGen/non-copyable-class-mangling.swift Normal file
View File

@@ -0,0 +1,11 @@
// RUN: %target-swift-frontend %s -emit-ir -o /dev/null
// Check that we don't crash on this in the old re-mangler.
// rdar://133333754
struct S<T> where T: ~Copyable {
final class C {
let x = 27
}
}