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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-08-03 20:08:18 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-08-03 20:08:18 +0000 |
| commit | 980daea857719b3eeb7dc88fe013049d361d955b (patch) | |
| tree | b4a859f5f789eb04937d82ff98b94b11805dd952 /test/CodeGen/ARM/vcombine.ll | |
| parent | ea1c9b7bacb6d58b4fef08fb32b1a7ccef856c1e (diff) | |
Fix Bug 4657: register scavenger asserts with subreg lowering
When LowerSubregsInstructionPass::LowerInsert eliminates an INSERT_SUBREG
instriction because it is an identity copy, make sure that the same registers
are alive before and after the elimination.
When the super-register is marked <undef> this requires inserting an
IMPLICIT_DEF instruction to make sure the super register is live.
Fix a related bug where a kill flag on the inserted sub-register was not transferred properly.
Finally, clear the undef flag in MachineInstr::addRegisterKilled. Undef implies dead and kill implies live, so they cant both be valid.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77989 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/vcombine.ll')
0 files changed, 0 insertions, 0 deletions