diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterCoalescer.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/RegisterCoalescer.cpp b/llvm/lib/CodeGen/RegisterCoalescer.cpp index 7afea2a4f6f..c911b9b47ea 100644 --- a/llvm/lib/CodeGen/RegisterCoalescer.cpp +++ b/llvm/lib/CodeGen/RegisterCoalescer.cpp @@ -1531,6 +1531,14 @@ bool RegisterCoalescer::joinReservedPhysReg(CoalescerPair &CP) { DEBUG(dbgs() << "\t\tInterference (read): " << *MI); return false; } + + // We must also check for clobbers caused by regmasks. + for (const auto &MO : MI->operands()) { + if (MO.isRegMask() && MO.clobbersPhysReg(DstReg)) { + DEBUG(dbgs() << "\t\tInterference (regmask clobber): " << *MI); + return false; + } + } } // We're going to remove the copy which defines a physical reserved |
