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[DebugInfo][Docs] Document that prologue/epilogue variable location c…
…hanges are ignored This patch documents that LLVM does not describe all changes in variable locations during the prologue and the epilogue. The debugger doesn't / shouldn't step through that portion of the function anyway, and describing every location through such stages would bloat location lists. Perform some minor cleanup at the same time, * Fix an enumerated list * Document that dbg.declare intrinsics have their variable location recorded in a MachineFunction table, not with DBG_VALUE meta-insts * Adds frame-indexes to the list of things that can be operands to DBG_VALUEs. Differential Revision: https://reviews.llvm.org/D63083 llvm-svn: 363654
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