[llvm] [CodeGen] Tail Duplication: Remove irrelevant phi node workaround (PR #86981)

[via llvm-commits]

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@@ -1,12 +1,18 @@
-; RUN: llc -march=hexagon -O2 -disable-cgp < %s
-; REQUIRES: asserts
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 4
+; RUN: llc -march=hexagon -O2 -disable-cgp < %s | FileCheck %s
 ;
 ; Tail duplication can ignore subregister information on PHI nodes, and as
 ; a result, generate COPY instructions between registers of different classes.
 ; This could lead to HexagonInstrInfo::copyPhysReg aborting on an unhandled
 ; src/dst combination.
 ;
 define i32 @foo(i32 %x, i64 %y) nounwind {
+; CHECK-LABEL: foo:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    {
+; CHECK-NEXT:     r1:0 = combine(r3,r2)
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AtariDreams wrote:

Alright, so is there a way to see all the optimizations done 

https://github.com/llvm/llvm-project/pull/86981