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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-25 03:36:12 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-06-25 03:36:12 +0000 |
| commit | 5213750e27c2f9fd7f5a0884c4a15f3b5e3aa843 (patch) | |
| tree | c7d1c0cce80564f03e6c9b642a00bc13ea090125 /lib/Support/Unix/Unix.h | |
| parent | 351c8818f2ff89d567094f46c3e220d6501ec3fa (diff) | |
Teach PHIElimination to handle <undef> operands.
When a PHI use is <undef>, don't emit a copy in the predecessor block,
but insert an IMPLICIT_DEF instruction instead. This ensures that
virtual register uses are always jointly dominated by defs, even if some
of them are IMPLICIT_DEF.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159121 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/Unix/Unix.h')
0 files changed, 0 insertions, 0 deletions