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llvm-svn: 267939
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- Keep implicit defs from inline-asm instructions.
- Treat register references from inline-asm as fixed.
llvm-svn: 267936
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Dead phi nodes are needed for code motion (such as copy propagation),
where a new use would be placed in a location that would be dominated
by a dead phi. Such a transformation is not legal for copy propagation,
and the existence of the phi would prevent it, but if the phi is not
there, it may appear to be valid.
llvm-svn: 267932
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Change TargetInstrInfo API to take `MachineInstr&` instead of
`MachineInstr*` in the functions related to predicated instructions
(I'll try to come back later and get some of the rest). All of these
functions require non-null parameters already, so references are more
clear. As a bonus, this happens to factor away a host of implicit
iterator => pointer conversions.
No functionality change intended.
llvm-svn: 261605
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llvm-svn: 258084
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llvm-svn: 258073
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llvm-svn: 257483
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Target independent, SSA-based data flow framework for representing
data flow between physical registers.
This commit implements the creation of the actual data flow graph.
llvm-svn: 257477
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