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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-08-03 20:08:18 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2009-08-03 20:08:18 +0000 |
| commit | 5d8ace090276d3f68269398bf656ed976441d407 (patch) | |
| tree | 9dee4471ee10d1639ab0623be1492cd8278af0ab /clang/lib/CodeGen/CodeGenModule.cpp | |
| parent | 0519492cb639b8c2f8c0958e60c3fce0a39fd3d2 (diff) | |
| download | bcm5719-llvm-5d8ace090276d3f68269398bf656ed976441d407.tar.gz bcm5719-llvm-5d8ace090276d3f68269398bf656ed976441d407.zip | |
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.
llvm-svn: 77989
Diffstat (limited to 'clang/lib/CodeGen/CodeGenModule.cpp')
0 files changed, 0 insertions, 0 deletions
