================
@@ -4347,6 +4362,19 @@ void CodeGenModule::emitCPUDispatchDefinition(GlobalDecl
GD) {
}
}
+/// Adds a declaration to the list of multi version functions if not present.
+void CodeGenModule::AddDeferredMultiVersionResolverToEmit(GlobalDecl GD) {
+ const auto *FD = cast<FunctionDecl>(GD.getDecl());
+ assert(FD && "Not a FunctionDecl?");
+
+ if (FD->isTargetVersionMultiVersion()) {
+ StringRef NamePrefix = getMangledName(GD).split('.').first;
----------------
labrinea wrote:
Initially I was using `FD->getName()` as the key here but this wouldn't work
for C++ mangled names. `getMangledName()` internally calls
`getMangledNameImpl()` which returns the multi versioned name (this would be
"foo.bar.baz._Mlse" in you example). The key needs to be the prefix
"foo.bar.baz" so that we don't push every multi version of "foo.bar.baz" in the
list `MultiVersionFuncs` to be processed by `emitMultiVersionFunctions()`. This
would generate a resolver body with multiple copies of the basic blocks
corresponding to each version. Hmm, I am not sure how to handle this example
properly, perhaps with `rsplit()`.
https://github.com/llvm/llvm-project/pull/84405
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