[llvm] [RegAlloc] Fix register's live range for early-clobber (PR #152895)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,102 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
+# RUN: llc -mtriple=i386-unknown-linux-gnu -start-before=twoaddressinstruction -stop-after=postrapseudos -verify-machineinstrs -o - %s | FileCheck %s
+
+# Test register live range that is split from rematerializing. The live range should
+# start with Slot_EarlyClobber instead of Slot_Register. Machineverifer can check it.
+
+--- |
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arsenm wrote:

Don't need the IR section, just need to drop the block name references 

https://github.com/llvm/llvm-project/pull/152895