diff options
Diffstat (limited to 'llvm/lib/CodeGen/BranchFolding.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/BranchFolding.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/BranchFolding.cpp b/llvm/lib/CodeGen/BranchFolding.cpp index 3b3e7a418feb..f32a18833d16 100644 --- a/llvm/lib/CodeGen/BranchFolding.cpp +++ b/llvm/lib/CodeGen/BranchFolding.cpp @@ -1971,6 +1971,7 @@ bool BranchFolder::HoistCommonCodeInSuccs(MachineBasicBlock *MBB) { MachineBasicBlock::iterator FIB = FBB->begin(); MachineBasicBlock::iterator TIE = TBB->end(); MachineBasicBlock::iterator FIE = FBB->end(); + MachineFunction &MF = *TBB->getParent(); while (TIB != TIE && FIB != FIE) { // Skip dbg_value instructions. These do not count. TIB = skipDebugInstructionsForward(TIB, TIE, false); @@ -1985,6 +1986,10 @@ bool BranchFolder::HoistCommonCodeInSuccs(MachineBasicBlock *MBB) { // Hard to reason about register liveness with predicated instruction. break; + if (!TII->isSafeToMove(*TIB, TBB, MF)) + // Don't hoist the instruction if it isn't safe to move. + break; + bool IsSafe = true; for (MachineOperand &MO : TIB->operands()) { // Don't attempt to hoist instructions with register masks. |