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Trace through multiple COPYs when looking for a physreg source. Add
hinting for vregs that will be copied into physregs (we only hinted
for vregs getting copied to a physreg previously). Give hinted a
register a bonus when deciding which value to spill. This is part of
my rewrite regallocfast series. In fact this one doesn't even have an
effect unless you also flip the allocation to happen from back to
front of a basic block. Nonetheless it helps to split this up to ease
review of D52010
Patch by Matthias Braun
llvm-svn: 360887
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The condition !AddrPool.empty() is tested before attachRangesOrLowHighPC(), which may add an entry to AddrPool. We emit DW_AT_low_pc (DW_FORM_addrx) but may incorrectly omit DW_AT_addr_base for LineTablesOnly. This can be easily reproduced:
clang -gdwarf-5 -gmlt -c a.cc
Fix this by moving !AddrPool.empty() below.
This was discovered while investigating an lld crash (fixed by D61889) on such object files: ld.lld --gdb-index a.o
Reviewed By: probinson
Differential Revision: https://reviews.llvm.org/D61891
llvm-svn: 360678
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Moved the X86 dependant .ll tests added in r356451 from
test/DebugInfo/Generic to test/DebugInfo/X86.
llvm-svn: 356460
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