| commit | 1d4801f22ab1fd6205b1cf625b690aefc554cd4c | [log] [tgz] |
|---|---|---|
| author | Maksim Levental <maksim.levental@gmail.com> | Fri Mar 28 23:28:11 2025 -0400 |
| committer | GitHub <noreply@github.com> | Fri Mar 28 23:28:11 2025 -0400 |
| tree | 43e4cc4338d85c37e6a8c8cd91a0bbfd315111e1 | |
| parent | 63bb0078f824143f580225ad92464b21186f646e [diff] |
[mlir] fix `maybeReplaceWithConstant` in IntRangeOptimizations (#133556) If a dialect is caching/reusing constants when materializing then such constants might already have `IntegerValueRangeLattice`s associated with them and the range endpoint bit widths might not match the new replacement (amongst other possible wackiness). I observed this with `%true = arith.constant true` which was materialized but had an existing `IntegerValueRangeLattice` (i.e., `solver.getOrCreateState<dataflow::IntegerValueRangeLattice>` was not uninitalized) with range endpoint bit widths: ``` umin bit width: 32 umax bit width: 32 smin bit width: 32 smax bit width: 32 ``` while the widths of the range end points for something like `%20 = arith.cmpi slt, %19, %c1_i32` (a replacement candidate) would be ``` umin bit width: 1 umax bit width: 1 smin bit width: 1 smax bit width: 1 ``` Thus, we should be clearing the analysis state each time a constant is reused.
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