[llvm-dev] how can i get consumer-typeset exe in debug mode

[Ramakota Reddy via llvm-dev]

Thanks Jessica.

With Regards,
Ramakota.

From: jpaquette at apple.com <jpaquette at apple.com>
Sent: Monday, April 22, 2019 9:46 PM
To: Ramakota Reddy <Ramakota.Reddy at arm.com>
Cc: llvm-dev at lists.llvm.org
Subject: Re: [llvm-dev] how can i get consumer-typeset exe in debug mode

Hi Ramakota,

You can get consumer-typeset in debug mode using the -g flag in Clang.

I don’t think this will necessarily help you a lot though. You’re debugging the compiler, not the consumer-typeset source code. Personally, I find the output assembly a bit more useful than actual test source information in this situation.

In situations like this, it’s probably better to see if you can find a SingleSource test failure. These are usually a bit easier to work with than large MultiSource tests. If there are no such failures, you can usually narrow things down by bisecting on object files.

e.g.

1) Compile consumer-typeset with a good compiler
2) Compile consumer-typeset with the compiler you want to debug
3) Link half the object files from the good consumer-typeset with half the object files from the bad consumer-typeset
4) Run the test and see if it fails
5) Repeat until you (hopefully) find one file that causes the issue

From there, you’re usually in a much better position to start debugging the compiler.

- Jessica

On Apr 22, 2019, at 3:15 am, Ramakota Reddy via llvm-dev <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>> wrote:

Hi All,

I have made some changes in AArch64LoadStoreOptimizer.cpp file and with check-llvm all tests are passing successfully.
But in llvm-test suite some tests are failing, like consumer-typeset tests are failing.

Now I want to debug with ‘consumer-typeset’ exe from SANDBOX. But it is release build.

How can I debug this issue in this case and how can I get ‘consumer-typeset’ exe in debug mode?

Could any one please give your suggestions on this issue.

Thanks & Regards,
Ramakota Reddy.
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