[Mlir-commits] [mlir] [mlir][OpenACC] Fix tile clause element bounds for descending loops (PR #227185)

[Razvan Lupusoru]

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@@ -196,24 +196,53 @@ mlir::acc::tileACCLoops(mlir::acc::LoopOp tileLoop,
     }
   }
 
-  // Compute the element-loop upper bounds min(origUB, origIV + scaledStep).
+  // Compute each element-loop upper bound by clamping the tile's far edge,
+  // origIV + scaledStep, to origUB. An ascending loop takes
+  // min(origUB, edge - 1), a descending one max(origUB, edge + 1).
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razvanlupusoru wrote:

This comment noting the -+ 1 - is that only true for inclusive bounds?

https://github.com/llvm/llvm-project/pull/227185