[Mlir-commits] [mlir] [mlir][NVVM] Set SpecialRangeableRegisterOp default int range to max (PR #174544)

[llvmlistbot at llvm.org]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-mlir-llvm

Author: Longsheng Du (LongshengDu)

<details>
<summary>Changes</summary>

This PR added fix to ensure NVVM SpecialRangeableRegisterOp values default int range have correct semantic (max range i.e. unknown), rather than uninitialized. 

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Full diff: https://github.com/llvm/llvm-project/pull/174544.diff


1 Files Affected:

- (modified) mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp (+2) 


``````````diff
diff --git a/mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp b/mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp
index 331d7a244310f..59f9acf140074 100644
--- a/mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp
+++ b/mlir/lib/Dialect/LLVMIR/IR/NVVMDialect.cpp
@@ -4544,6 +4544,8 @@ static void nvvmInferResultRanges(Operation *op, Value result,
   if (auto rangeAttr = op->getAttrOfType<LLVM::ConstantRangeAttr>("range")) {
     setResultRanges(result, {rangeAttr.getLower(), rangeAttr.getUpper(),
                              rangeAttr.getLower(), rangeAttr.getUpper()});
+  } else {
+    setResultRanges(result, IntegerValueRange::getMaxRange(result).getValue());
   }
 }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/174544