[llvm] r303197 - ShrinkWrap: Add skipFunction() call

Quentin Colombet via llvm-commits llvm-commits at lists.llvm.org
Wed May 17 07:15:32 PDT 2017


Thanks!

> On May 16, 2017, at 2:07 PM, Matthias Braun <matze at braunis.de> wrote:
> 
> r303208
> 
>> On May 16, 2017, at 1:40 PM, Quentin Colombet via llvm-commits <llvm-commits at lists.llvm.org> wrote:
>> 
>> Could you add a test case?
>>> On May 16, 2017, at 11:43 AM, Matthias Braun via llvm-commits <llvm-commits at lists.llvm.org> wrote:
>>> 
>>> Author: matze
>>> Date: Tue May 16 13:43:30 2017
>>> New Revision: 303197
>>> 
>>> URL: http://llvm.org/viewvc/llvm-project?rev=303197&view=rev
>>> Log:
>>> ShrinkWrap: Add skipFunction() call
>>> 
>>> ShrinkWrapping is a performance optimization that can safely be skipped,
>>> so we can add `if (!skipFunction()) return;`
>>> 
>>> Modified:
>>>  llvm/trunk/lib/CodeGen/ShrinkWrap.cpp
>>> 
>>> Modified: llvm/trunk/lib/CodeGen/ShrinkWrap.cpp
>>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/ShrinkWrap.cpp?rev=303197&r1=303196&r2=303197&view=diff
>>> ==============================================================================
>>> --- llvm/trunk/lib/CodeGen/ShrinkWrap.cpp (original)
>>> +++ llvm/trunk/lib/CodeGen/ShrinkWrap.cpp Tue May 16 13:43:30 2017
>>> @@ -425,7 +425,7 @@ static bool isIrreducibleCFG(const Machi
>>> }
>>> 
>>> bool ShrinkWrap::runOnMachineFunction(MachineFunction &MF) {
>>> -  if (MF.empty() || !isShrinkWrapEnabled(MF))
>>> +  if (skipFunction(*MF.getFunction()) || MF.empty() || !isShrinkWrapEnabled(MF))
>>>   return false;
>>> 
>>> DEBUG(dbgs() << "**** Analysing " << MF.getName() << '\n');
>>> 
>>> 
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