[llvm] [CodeGen] Emit a more efficient magic number multiplication for exact udivs (PR #87161)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,171 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
+; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+avx2 | FileCheck %s --check-prefix=X64
+
+define i32 @test1(i32 %x) {
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arsenm wrote:

Could move test to AArch64 and test both dag and globalisel paths? Also should add the scalable test 

https://github.com/llvm/llvm-project/pull/87161