The duplicate EH clauses are no longer used by any runtime. CoreCLR stopped using them with new exception handling, and the legacy EH has been removed. NativeAOT never used them. We should just stop emitting them altogether.
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// Duplicate clauses are not used by NativeAOT ABI |
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if (compiler->UsesFunclets() && !isNativeAOT) |
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{ |
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for (XTnum = 0; XTnum < compiler->compHndBBtabCount; XTnum++) |
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{ |
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for (enclosingTryIndex = compiler->ehTrueEnclosingTryIndex(XTnum); // find the true enclosing try index, |
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// ignoring 'mutual protect' trys |
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enclosingTryIndex != EHblkDsc::NO_ENCLOSING_INDEX; |
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enclosingTryIndex = compiler->ehGetEnclosingTryIndex(enclosingTryIndex)) |
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{ |
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++duplicateClauseCount; |
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} |
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} |
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EHCount += duplicateClauseCount; |
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} |
