diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/LiveRangeEdit.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/LiveRangeEdit.cpp b/llvm/lib/CodeGen/LiveRangeEdit.cpp index 0dfb084f1e1..f8fbc7ddf0c 100644 --- a/llvm/lib/CodeGen/LiveRangeEdit.cpp +++ b/llvm/lib/CodeGen/LiveRangeEdit.cpp @@ -96,6 +96,13 @@ bool LiveRangeEdit::allUsesAvailableAt(const MachineInstr *OrigMI, const VNInfo *OVNI = li.getVNInfoAt(OrigIdx); if (!OVNI) continue; + + // Don't allow rematerialization immediately after the original def. + // It would be incorrect if OrigMI redefines the register. + // See PR14098. + if (SlotIndex::isSameInstr(OrigIdx, UseIdx)) + return false; + if (OVNI != li.getVNInfoAt(UseIdx)) return false; } |
