diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/MachineInstr.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp index 8ee85c6..7afa61f 100644 --- a/llvm/lib/CodeGen/MachineInstr.cpp +++ b/llvm/lib/CodeGen/MachineInstr.cpp @@ -1220,6 +1220,10 @@ bool MachineInstr::mayAlias(AAResults *AA, const MachineInstr &Other, if (!mayStore() && !Other.mayStore()) return false; + // Both instructions must be memory operations to be able to alias. + if (!mayLoadOrStore() || !Other.mayLoadOrStore()) + return false; + // Let the target decide if memory accesses cannot possibly overlap. if (TII->areMemAccessesTriviallyDisjoint(*this, Other)) return false; |