[llvm] [SelectionDAG] Avoid redundant comparisons in bit-test switch lowering (PR #222626)

[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 UTC_ARGS: --version 6
+; RUN: llc -mtriple=aarch64 -O2 -verify-machineinstrs < %s | FileCheck %s
+
+declare void @foo1(i32)
+declare void @foo2(i32)
+declare void @foo3(i32)
+declare void @foo4(i32)
+declare void @foo5(i32)
+
+define i32 @switch1(i32 %x) "no-jump-tables"="true" {
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arsenm wrote:

```suggestion
define i32 @switch1(i32 %x) nounwind "no-jump-tables"="true" {
```

https://github.com/llvm/llvm-project/pull/222626