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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-10-12 00:06:23 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-10-12 00:06:23 +0000 |
| commit | 39c31a77b8b4313bb4e4a7ee24e8c9254c8ff4b8 (patch) | |
| tree | 2d1da8e6428d1fd8e91d8f6e52a79c37e156ec75 /llvm/lib/Object/ELFObjectFile.cpp | |
| parent | fa643c8f3b19b9940387089a527ddb2d568cd2fe (diff) | |
| download | llvm-39c31a77b8b4313bb4e4a7ee24e8c9254c8ff4b8.zip llvm-39c31a77b8b4313bb4e4a7ee24e8c9254c8ff4b8.tar.gz llvm-39c31a77b8b4313bb4e4a7ee24e8c9254c8ff4b8.tar.bz2 | |
Fix -widen-vmovs liveness issues.
When widening a copy, we are reading a larger register that may not be
live. Use an <undef> flag to tell the register scavenger and machine
code verifier that we know the value isn't defined.
We now widen:
%S6<def> = COPY %S4<kill>, %D3<imp-def>
into:
%D3<def> = VMOVD %D2<undef>, pred:14, pred:%noreg, %S4<imp-use,kill>
This also keeps the <kill> flag on %S4 so we don't inadvertently kill a
live value in %S5.
Finally, ensure that ARMBaseInstrInfo::setExecutionDomain() preserves
the <undef> flag when converting VMOVD to VORR.
llvm-svn: 141746
Diffstat (limited to 'llvm/lib/Object/ELFObjectFile.cpp')
0 files changed, 0 insertions, 0 deletions