[Mlir-commits] [mlir] Rewrites for I2 to I8 signed and unsigned extension (PR #121298)

[llvmlistbot at llvm.org]

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@@ -1233,6 +1233,117 @@ static Value rewriteI4ToI8UnsignedExt(PatternRewriter &rewriter, Location loc,
   return rewriter.create<vector::InterleaveOp>(loc, low, high);
 }
 
+/// Rewrite the i2 -> i8 signed extension into a sequence of shuffles and
+/// bitwise ops that take advantage of high-level information to avoid leaving
+/// LLVM to scramble with peephole optimizations.
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ziereis wrote:

Makes sense. Honestly, I just copied these comments from the other functions :D. I removed the part about the "high-level" information in the comments.

https://github.com/llvm/llvm-project/pull/121298