[llvm-commits] [llvm] r131824 - /llvm/trunk/tools/opt/opt.cpp

[Cameron Zwarich]

On May 21, 2011, at 11:27 PM, Chris Lattner wrote:

> On May 21, 2011, at 11:02 PM, Cameron Zwarich wrote:
> 
>> This changed the opt pass order by removing the global passes that run first:
>> 
>> Pass Arguments:  -targetdata -no-aa -tbaa -basicaa -simplifycfg -domtree -scalarrepl -early-cse
>> Target Data Layout
>> No Alias Analysis (always returns 'may' alias)
>> Type-Based Alias Analysis
>> Basic Alias Analysis (stateless AA impl)
>> ModulePass Manager
>>   FunctionPass Manager
>>     Simplify the CFG
>>     Dominator Tree Construction
>>     Scalar Replacement of Aggregates (DT)
>>     Early CSE
>> 
>> In the future, it would be a good idea to compare -debug-pass=Structure output when making changes that are supposed to preserve existing behavior. It would also be good to check that clang still includes these passes.
> 
> Hi Cameron,
> 
> What behavior are you saying that I'm changing here?  "opt" has a bunch of different codepaths.

opt -std-compile-opts -debug-pass=Structure <file>

Cameron