[llvm] [RISCV][GISEL] Add legalizer for G_BSWAP (PR #70226)

[Craig Topper via llvm-commits]

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@@ -0,0 +1,180 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 3
+# RUN: llc -mtriple=riscv32 -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            bswap_i8
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topperc wrote:

How was this test created? i8 bswap isn't allowed in IR. The number of bytes must be even.

https://github.com/llvm/llvm-project/pull/70226