diff options
| author | Quentin Colombet <qcolombet@apple.com> | 2014-08-21 21:34:06 +0000 |
|---|---|---|
| committer | Quentin Colombet <qcolombet@apple.com> | 2014-08-21 21:34:06 +0000 |
| commit | 6b36337c0913fc5fdb4e73678d63248bd89ff5f0 (patch) | |
| tree | 25ff3ca02acdc7de130fc753096a49d743a5f5a5 /llvm/lib | |
| parent | c8dc50fa515b5747b8ff1f1a20bdd2cb22d1ca1f (diff) | |
| download | bcm5719-llvm-6b36337c0913fc5fdb4e73678d63248bd89ff5f0.tar.gz bcm5719-llvm-6b36337c0913fc5fdb4e73678d63248bd89ff5f0.zip | |
[PeepholeOptimizer] Update the kill flags when extending the live-range of the
source of a copy.
<rdar://problem/12702965>
llvm-svn: 216229
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/PeepholeOptimizer.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/PeepholeOptimizer.cpp b/llvm/lib/CodeGen/PeepholeOptimizer.cpp index ae14331d663..98fcc2e2529 100644 --- a/llvm/lib/CodeGen/PeepholeOptimizer.cpp +++ b/llvm/lib/CodeGen/PeepholeOptimizer.cpp @@ -899,7 +899,11 @@ bool PeepholeOptimizer::optimizeCoalescableCopy(MachineInstr *MI) { if (!findNextSource(NewSrc, NewSubReg) || SrcReg == NewSrc) continue; // Rewrite source. - Changed |= CpyRewriter->RewriteCurrentSource(NewSrc, NewSubReg); + if (CpyRewriter->RewriteCurrentSource(NewSrc, NewSubReg)) { + // We may have extended the live-range of NewSrc, account for that. + MRI->clearKillFlags(NewSrc); + Changed = true; + } } // TODO: We could have a clean-up method to tidy the instruction. // E.g., v0 = INSERT_SUBREG v1, v1.sub0, sub0 |
