[llvm] [GISel] Funnel shift combiner port from SelectionDAG ISel to GlobalISel (PR #135132)

[Min-Yih Hsu via llvm-commits]

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@@ -105,3 +105,53 @@ define i16 @test_shl_i48_2(i48 %x, i48 %y) {
   %trunc = trunc i48 %shl to i16
   ret i16 %trunc
 }
+
+define i16 @test_fshl_i32(i32 %x, i32 %_, i32 %y) {
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mshockwave wrote:

(not this patch) next time, you could make the first commit the pre-commit test, followed by your actual patch, such that you don't have to comment & un-comment like you did here.

https://github.com/llvm/llvm-project/pull/135132