[llvm] pr/amdgpu closed world (PR #66488)

[Matt Arsenault via llvm-commits]

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@@ -1036,14 +1041,33 @@ static bool runImpl(Module &M, AnalysisGetter &AG, TargetMachine &TM) {
   DenseSet<const char *> Allowed(
       {&AAAMDAttributes::ID, &AAUniformWorkGroupSize::ID,
        &AAPotentialValues::ID, &AAAMDFlatWorkGroupSize::ID,
-       &AAAMDWavesPerEU::ID, &AAAMDGPUNoAGPR::ID, &AACallEdges::ID,
-       &AAPointerInfo::ID, &AAPotentialConstantValues::ID,
-       &AAUnderlyingObjects::ID});
+       &AAAMDWavesPerEU::ID, &AAAMDGPUNoAGPR::ID, &AACallEdges::ID, &AAPointerInfo::ID,
+       &AAPotentialConstantValues::ID, &AAUnderlyingObjects::ID,
+       &AAIndirectCallInfo::ID});
+
+  /// Helper to decide if we should specialize the indirect \p CB for \p Callee,
+  /// which is one of the \p NumCallees potential callees.
+  auto IndirectCalleeSpecializationCallback =
+      [&](Attributor &A, const AbstractAttribute &AA, CallBase &CB,
+          Function &Callee, unsigned NumCallees) {
+        if (AMDGPU::isEntryFunctionCC(Callee.getCallingConv()))
+          return false;
+        // Singleton functions should be specialized.
+        if (NumCallees == 1)
+          return true;
+        // Otherewise specialize uniform values.
+        const auto &TTI = TM.getTargetTransformInfo(*CB.getCaller());
+        return TTI.isAlwaysUniform(CB.getCalledOperand());
+      };
 
   AttributorConfig AC(CGUpdater);
   AC.Allowed = &Allowed;
   AC.IsModulePass = true;
   AC.DefaultInitializeLiveInternals = false;
+  errs() << "HasWholeProgramVisibility " << HasWholeProgramVisibility << "\n";
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arsenm wrote:

Leftover debug printing 

https://github.com/llvm/llvm-project/pull/66488