[llvm] [NVPTX] Cleanup NVPTXLowerArgs, simplifying logic and improving alignment propagation (PR #180286)

[Alex MacLean via llvm-commits]

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@@ -425,27 +405,26 @@ static CallInst *createNVVMInternalAddrspaceWrap(IRBuilder<> &IRB,
     ArgInParam->addRetAttr(
         Attribute::getWithAlignment(ArgInParam->getContext(), *ParamAlign));
 
+  Arg.addAttr(Attribute::get(Arg.getContext(), "nvvm.grid_constant"));
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AlexMaclean wrote:

See above. It provides better sanity checking and makes it possible to run the pass multiple times.

https://github.com/llvm/llvm-project/pull/180286