[llvm] [PowerPC] eliminate RLWINM instruction following LBARX as possible (PR #144089)

[zhijian lin via llvm-commits]

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@@ -6,18 +6,17 @@ define void @test(ptr %ptr, i8 %cmp, i8 %val) {
 ; PPC64LE:       # %bb.0:
 ; PPC64LE-NEXT:    clrlwi 5, 5, 24
 ; PPC64LE-NEXT:    clrlwi 4, 4, 24
-; PPC64LE-NEXT:    .p2align        5
-; PPC64LE-NEXT:  .LBB0_1:                                # %cmpxchg.start
-; PPC64LE-NEXT:                                          # =>This Inner Loop Header: Depth=1
+; PPC64LE-NEXT:    .p2align 5
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diggerlin wrote:

> Why did this change?

the change is caused by run the update_llc_test_checks.py, I will create NFC PR for it before the patch.

https://github.com/llvm/llvm-project/pull/144089