[llvm] [GISel][X86] port X86PreLegalizerCombiner to npm (PR #182638)

[Aiden Grossman via llvm-commits]

================
@@ -0,0 +1,520 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple x86_64 -run-pass=x86-prelegalizer-combiner %s -o - | FileCheck %s
----------------
boomanaiden154 wrote:

This only tests the legacy PM? We should probably test both legacy/new PM here.

https://github.com/llvm/llvm-project/pull/182638