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| author | Tim Northover <tnorthover@apple.com> | 2015-04-06 18:44:42 +0000 |
|---|---|---|
| committer | Tim Northover <tnorthover@apple.com> | 2015-04-06 18:44:42 +0000 |
| commit | 42335572bb32533c88a9f26b8a04995cd2000503 (patch) | |
| tree | 0e760ecc3e76f6125d143fe348c9b7e53ac1881e /llvm/lib/IR/DIBuilder.cpp | |
| parent | dc3c3ee8526e1cbfdb4859882f5e4739c5acc37f (diff) | |
| download | bcm5719-llvm-42335572bb32533c88a9f26b8a04995cd2000503.tar.gz bcm5719-llvm-42335572bb32533c88a9f26b8a04995cd2000503.zip | |
ARM: do not relax Thumb1 -> Thumb2 if only Thumb1 is available.
After recognising that a certain narrow instruction might need a relocation to
be represented, we used to unconditionally relax it to a Thumb2 instruction to
permit this. Unfortunately, some CPUs (e.g. v6m) don't even have most Thumb2
instructions, so we end up emitting a completely invalid instruction.
Theoretically, ELF does have relocations for these situations; but they are
fairly unusable with such short ranges and the ABI document even says they're
documented "for completeness". So an error is probably better there too.
rdar://20391953
llvm-svn: 234195
Diffstat (limited to 'llvm/lib/IR/DIBuilder.cpp')
0 files changed, 0 insertions, 0 deletions
