[6.40] [tmva][sofie] fix double-counted dilation in Conv im2col and adding regression test#22482
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Conv generated invalid code and crashed (segfault) for dilation > 1. The operator builds a dilated `_f` weight buffer and expands `fAttrKernelShape` to the effective kernel size, but the im2col call was still passed the real dilation, so dilation was applied twice (expanded kernel + dilation). This produced a negative output dimension and an out-of-bounds write. Fix: after the dilated `_f` is built, the dense im2col must use dilation 1, since the dilation is already folded into the expanded kernel shape and the `_f` layout. This is a no-op for dilation 1, so existing Conv tests are unaffected. Also adds a `ConvWithDilation` test (3x3 kernel, dilation 2) with reference output. The suite had no dilation > 1 case before, which is why this was never caught. The full SOFIE test suite passes locally on master. (cherry picked from commit d42a7a7)
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Test Results 22 files 22 suites 3d 9h 32m 4s ⏱️ Results for commit f55c1d6. ♻️ This comment has been updated with latest results. |
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Backport of #22474, requested by @guitargeek. For your information @harz05