Change Details

For a constant shift amount, add the following fold. shl (zext (i1 X)), ShAmt --> select (X, 1 << ShAmt, 0) Fixes pr42257

For a constant shift amount, add the following fold. shl (zext (i1 X)), ShAmt --> select (X, 1 << ShAmt, 0) https://rise4fun.com/Alive/IZ9 Fixes [[ https://bugs.llvm.org/show_bug.cgi?id=42257 | PR42257 ]].

For a constant shift amount, add the following fold. shl (zext (i1 X)), ShAmt --> select (X, 1 << ShAmt, 0) https://rise4fun.com/Alive/IZ9 Fixes pr[[ https://bugs.llvm.org/show_bug.cgi?id=42257 | PR42257 ]].