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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-25 18:12:18 +0000 |
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| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-25 18:12:18 +0000 |
| commit | eb49566447ba2ef4e9be32f32e896e3e1cee0b54 (patch) | |
| tree | a728c2bae6c816dba42dd5e25fb8795994233df8 /llvm/lib/Transforms | |
| parent | 7b5a716f3d5ed19b45853d6861e0029f5fce1ee4 (diff) | |
| download | bcm5719-llvm-eb49566447ba2ef4e9be32f32e896e3e1cee0b54.tar.gz bcm5719-llvm-eb49566447ba2ef4e9be32f32e896e3e1cee0b54.zip | |
Run ProcessImplicitDefs on SSA form where it can be much simpler.
Implicitly defined virtual registers can simply have the <undef> bit set
on all uses, and copies can be turned into implicit defs recursively.
Physical registers are a bit trickier. We handle the common case where a
physreg def is used by a nearby instruction in the same basic block. For
more complicated cases, just leave the IMPLICIT_DEF instruction in.
llvm-svn: 159149
Diffstat (limited to 'llvm/lib/Transforms')
0 files changed, 0 insertions, 0 deletions
