From ba84ed7e9234b7a84009b3cb8475d1be7b1529d9 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 5 Jan 2008 02:33:22 +0000 Subject: [PATCH] don't sink anything with side effects, this makes lots of stuff work, but sinks almost nothing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45617 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineSink.cpp | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp index dff60f6d395..31aeea5724a 100644 --- a/lib/CodeGen/MachineSink.cpp +++ b/lib/CodeGen/MachineSink.cpp @@ -130,6 +130,10 @@ 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) { + // 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 // anything we can't handle, bail out. MachineBasicBlock *ParentBlock = MI->getParent(); -- 2.34.1