diff options
Diffstat (limited to 'lib/CodeGen/MachineBasicBlock.cpp')
-rw-r--r-- | lib/CodeGen/MachineBasicBlock.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp index ca71e3bf80..3d36dc18e3 100644 --- a/lib/CodeGen/MachineBasicBlock.cpp +++ b/lib/CodeGen/MachineBasicBlock.cpp @@ -677,6 +677,11 @@ MachineBasicBlock::SplitCriticalEdge(MachineBasicBlock *Succ, Pass *P) { MachineFunction *MF = getParent(); DebugLoc dl; // FIXME: this is nowhere + // Performance might be harmed on HW that implements branching using exec mask + // where both sides of the branches are always executed. + if (MF->getTarget().requiresStructuredCFG()) + return NULL; + // We may need to update this's terminator, but we can't do that if // AnalyzeBranch fails. If this uses a jump table, we won't touch it. const TargetInstrInfo *TII = MF->getTarget().getInstrInfo(); |