[llvm] [ObjCARC] Run ObjCARCContract before PreISelIntrinsicLowering (PR #184149)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,19 @@
+; RUN: llc -o - %s | FileCheck %s
+
+; Verify that ObjCARCContract rewrites retainRV to claimRV, removing the
+; retainRV marker.
+
+target triple = "arm64-apple-ios18"
+
+declare ptr @f()
+
+; CHECK-LABEL: _t:
+; CHECK:         bl _f
+; CHECK-NEXT:    bl _objc_claimAutoreleasedReturnValue
+; CHECK-NOT:     mov x29, x29
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arsenm wrote:

Generate checks instead of -NOT 

https://github.com/llvm/llvm-project/pull/184149