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Commit 1b02dad9 authored by Vedant Kumar's avatar Vedant Kumar
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[CodeGenPrepare] Preserve debug locs in OptimizeExtractBits 

CodeGenPrepare has a transform that sinks {lshr, trunc} pairs to make it
easier for the backend to emit fancy extract-bits instructions (e.g UBFX).

Teach it to preserve debug locations and salvage debug values.

llvm-svn: 342319
parent d197ebf3
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