[clang] [flang] [llvm] [IR] Convert from nocapture to captures(none) (PR #123181)

[via cfe-commits]

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@@ -5742,27 +5742,36 @@ bool AANoCapture::isImpliedByIR(Attributor &A, const 
IRPosition &IRP,
     return true;
   }
 
-  if (A.hasAttr(IRP, {Attribute::NoCapture},
-                /* IgnoreSubsumingPositions */ true, Attribute::NoCapture))
-    return true;
+  SmallVector<Attribute, 1> Attrs;
+  A.getAttrs(IRP, {Attribute::Captures}, Attrs,
+             /* IgnoreSubsumingPositions */ true);
+  for (const Attribute &Attr : Attrs)
+    if (capturesNothing(Attr.getCaptureInfo()))
+      return true;
 
   if (IRP.getPositionKind() == IRP_CALL_SITE_ARGUMENT)
-    if (Argument *Arg = IRP.getAssociatedArgument())
-      if (A.hasAttr(IRPosition::argument(*Arg),
-                    {Attribute::NoCapture, Attribute::ByVal},
-                    /* IgnoreSubsumingPositions */ true)) {
-        A.manifestAttrs(IRP,
-                        Attribute::get(V.getContext(), Attribute::NoCapture));
+    if (Argument *Arg = IRP.getAssociatedArgument()) {
+      SmallVector<Attribute, 1> Attrs;
----------------
goldsteinn wrote:

2? Or default?

https://github.com/llvm/llvm-project/pull/123181
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