diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/MachineSink.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp index 87114396f9..a85a41fbae 100644 --- a/lib/CodeGen/MachineSink.cpp +++ b/lib/CodeGen/MachineSink.cpp @@ -167,6 +167,10 @@ bool MachineSinking::SinkInstruction(MachineInstr *MI, bool &SawStore) { } else { // Virtual register uses are always safe to sink. if (MO.isUse()) continue; + + // If it's not safe to move defs of the register class, then abort. + if (!TII->isSafeToMoveRegClassDefs(RegInfo->getRegClass(Reg))) + return false; // FIXME: This picks a successor to sink into based on having one // successor that dominates all the uses. However, there are cases where |