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Revert "PTX: only lower byval arguments the back-end would copy."#838

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maleadt merged 1 commit into
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tb/byval
Jun 8, 2026
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Revert "PTX: only lower byval arguments the back-end would copy."#838
maleadt merged 1 commit into
mainfrom
tb/byval

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@maleadt maleadt commented Jun 8, 2026

This reverts commit 189c66e. Turns out byval lowering in NVPTX isn't good enough yet, and hurts performance.

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codecov Bot commented Jun 8, 2026

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.01%. Comparing base (8adcb92) to head (58d5b95).

Additional details and impacted files
@@            Coverage Diff             @@
##             main     #838      +/-   ##
==========================================
+ Coverage   77.95%   79.01%   +1.05%     
==========================================
  Files          25       25              
  Lines        4545     4531      -14     
==========================================
+ Hits         3543     3580      +37     
+ Misses       1002      951      -51     

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@maleadt maleadt merged commit e75450c into main Jun 8, 2026
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@maleadt maleadt deleted the tb/byval branch June 8, 2026 16:00
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maleadt commented Jun 8, 2026

Debugged and fixed upstream: llvm/llvm-project#202379

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