forked from OSchip/llvm-project
Clamp down on sinking of lots of instructions.
llvm-svn: 45841
This commit is contained in:
parent
98f7203680
commit
f3bd2cd37c
|
@ -130,6 +130,15 @@ bool MachineSinking::ProcessBlock(MachineBasicBlock &MBB) {
|
|||
/// SinkInstruction - Determine whether it is safe to sink the specified machine
|
||||
/// instruction out of its current block into a successor.
|
||||
bool MachineSinking::SinkInstruction(MachineInstr *MI) {
|
||||
const TargetInstrDesc &TID = MI->getDesc();
|
||||
|
||||
// Ignore stuff that we obviously can't sink.
|
||||
if (TID.mayStore() || TID.isCall() || TID.isReturn() || TID.isBranch())
|
||||
return false;
|
||||
|
||||
if (TID.mayLoad())
|
||||
return false;
|
||||
|
||||
// Don't sink things with side-effects we don't understand.
|
||||
if (TII->hasUnmodelledSideEffects(MI))
|
||||
return false;
|
||||
|
|
Loading…
Reference in New Issue