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don't sink anything with side effects, this makes lots of stuff work, but sinks almost nothing.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45617 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2008-01-05 02:33:22 +00:00
parent 2a3e08b596
commit ba84ed7e92
1 changed files with 4 additions and 0 deletions
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lib/CodeGen/MachineSink.cpp
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@ -130,6 +130,10 @@ bool MachineSinking::ProcessBlock(MachineBasicBlock &MBB) {
/// SinkInstruction - Determine whether it is safe to sink the specified machine /// SinkInstruction - Determine whether it is safe to sink the specified machine
/// instruction out of its current block into a successor. /// instruction out of its current block into a successor.
bool MachineSinking::SinkInstruction(MachineInstr *MI) { bool MachineSinking::SinkInstruction(MachineInstr *MI) {
// Don't sink things with side-effects we don't understand.
if (TII->hasUnmodelledSideEffects(MI))
return false;
// Loop over all the operands of the specified instruction. If there is // Loop over all the operands of the specified instruction. If there is
// anything we can't handle, bail out. // anything we can't handle, bail out.
MachineBasicBlock *ParentBlock = MI->getParent(); MachineBasicBlock *ParentBlock = MI->getParent();