[Mlir-commits] [mlir] [mlir][scf] Fix front peeling skipped due to float rounding in trip count (PR #231100)

llvmlistbot at llvm.org llvmlistbot at llvm.org
Mon Oct 12 22:24:56 PDT 2026


github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- mlir/lib/Dialect/SCF/Transforms/LoopSpecialization.cpp --diff_from_common_commit
``````````

:warning:
The reproduction instructions above might return results for more than one PR
in a stack if you are using a stacked PR workflow. You can limit the results by
changing `origin/main` to the base branch/commit you want to compare against.
:warning:

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/mlir/lib/Dialect/SCF/Transforms/LoopSpecialization.cpp b/mlir/lib/Dialect/SCF/Transforms/LoopSpecialization.cpp
index e46b588a2..70e37a386 100644
--- a/mlir/lib/Dialect/SCF/Transforms/LoopSpecialization.cpp
+++ b/mlir/lib/Dialect/SCF/Transforms/LoopSpecialization.cpp
@@ -238,12 +238,12 @@ LogicalResult mlir::scf::peelForLoopFirstIteration(RewriterBase &b, ForOp forOp,
   auto ubInt = getConstantIntValue(forOp.getUpperBound());
   auto stepInt = getConstantIntValue(forOp.getStep());
 
-  // Peeling is not needed if there is at most one iteration. 
+  // Peeling is not needed if there is at most one iteration.
   // Per the scf.for semantics, the trip count is
   // max(0, ceil((UB - LB) / Step)), so for a positive step there is more than
-  // one iteration exactly when UB - LB > Step. 
-  // Compare the integers directly: going through float is lossy and wrongly skipped
-  // peeling of loops with two iterations.
+  // one iteration exactly when UB - LB > Step.
+  // Compare the integers directly: going through float is lossy and wrongly
+  // skipped peeling of loops with two iterations.
   if (lbInt && ubInt && stepInt && *ubInt - *lbInt <= *stepInt)
     return failure();
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/231100


More information about the Mlir-commits mailing list