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| author | Chris Lattner <sabre@nondot.org> | 2008-01-05 02:33:22 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-01-05 02:33:22 +0000 |
| commit | f2706d8ef3459a99d2516d3e98185435b37fe679 (patch) | |
| tree | 9155a8d29929ca885a63f5c8aa149931d0e9ef98 /lib/CodeGen | |
| parent | af74325e5c7e4c8f473265247e97d152cec501b3 (diff) | |
| download | external_llvm-f2706d8ef3459a99d2516d3e98185435b37fe679.zip external_llvm-f2706d8ef3459a99d2516d3e98185435b37fe679.tar.gz external_llvm-f2706d8ef3459a99d2516d3e98185435b37fe679.tar.bz2 | |
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
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/MachineSink.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp index dff60f6..31aeea5 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(); |