[llvm] r222562 - Disable header duplication at -Oz in loop-rotate pass.

[Rafael Avila de Espindola]

Testcase?

Sent from my iPhone

> On Nov 21, 2014, at 14:53, Roman Divacky <rdivacky at freebsd.org> wrote:
> 
> Author: rdivacky
> Date: Fri Nov 21 13:53:24 2014
> New Revision: 222562
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=222562&view=rev
> Log:
> Disable header duplication at -Oz in loop-rotate pass.
> 
> Modified:
>    llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
> 
> Modified: llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp?rev=222562&r1=222561&r2=222562&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp (original)
> +++ llvm/trunk/lib/Transforms/IPO/PassManagerBuilder.cpp Fri Nov 21 13:53:24 2014
> @@ -228,7 +228,8 @@ void PassManagerBuilder::populateModuleP
>     MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
>   MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
>   MPM.add(createReassociatePass()); // Reassociate expressions
> -  MPM.add(createLoopRotatePass());            // Rotate Loop
> +  // Rotate Loop - disable header duplication at -Oz
> +  MPM.add(createLoopRotatePass(SizeLevel == 2 ? 0 : -1));
>   MPM.add(createLICMPass());                  // Hoist loop invariants
>   MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
>   MPM.add(createInstructionCombiningPass());
> 
> 
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