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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-10-05 20:26:40 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-10-05 20:26:40 +0000 |
| commit | d2ed2d71c95462a6b14e7c7c8c82cb727ed342eb (patch) | |
| tree | a19930d07c906d416c5db4679cb792ba530653ff /test/Transforms/InstCombine/2010-11-01-lshr-mask.ll | |
| parent | 9bb272c900b46ebf78aa1b9daa7e3991bec8ff18 (diff) | |
| download | llvm-d2ed2d71c95462a6b14e7c7c8c82cb727ed342eb.tar.gz llvm-d2ed2d71c95462a6b14e7c7c8c82cb727ed342eb.tar.bz2 llvm-d2ed2d71c95462a6b14e7c7c8c82cb727ed342eb.tar.xz | |
Simplify EXTRACT_SUBREG emission.
EXTRACT_SUBREG is emitted as %dst = COPY %src:sub, so there is no need to
constrain the %dst register class. RegisterCoalescer will apply the
necessary constraints if it decides to eliminate the COPY.
The %src register class does need to be constrained to something with
the right sub-registers, though. This is currently done manually with
COPY_TO_REGCLASS nodes. They can possibly be removed after this patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141207 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/2010-11-01-lshr-mask.ll')
0 files changed, 0 insertions, 0 deletions