[PATCH] D31755: [DebugInfo][X86] Fix handling of DBG_VALUE's in post-RA scheduler.

[Andrew Ng via Phabricator via llvm-commits]

andrewng created this revision.

This patch fixes a bug with the updating of DBG_VALUE's in
BreakAntiDependencies. Previously, it would only attempt to update the first
DBG_VALUE following the instruction whose register is being changed,
potentially leaving DBG_VALUE's referring to the wrong register. Now the code
will attempt to update all DBG_VALUE's that immediately follow the instruction.

This issue was detected as a result of an optimized codegen difference with
"-g" where an X86 byte/word fixup was not performed due to a DBG_VALUE
referencing the wrong register.


https://reviews.llvm.org/D31755

Files:
  lib/CodeGen/AggressiveAntiDepBreaker.cpp
  lib/CodeGen/AntiDepBreaker.h
  lib/CodeGen/CriticalAntiDepBreaker.cpp
  test/CodeGen/X86/post-ra-sched-with-debug.mir

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