[llvm] [SimplifyCFG] Simplify identical predecessors (PR #173022)

[Antonio Frighetto via llvm-commits]

================
@@ -0,0 +1,53 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -sink-common-insts -S | FileCheck %s -check-prefix=SIMPLIFY-CFG
+
+define i8 @foo(i8 %v1, i8 %v2) {
----------------
antoniofrighetto wrote:

Please give the function a meaningful name.

https://github.com/llvm/llvm-project/pull/173022