[llvm-dev] noinline changes between 3.8 and 4.0?

[Friedman, Eli via llvm-dev]

On 5/19/2017 12:50 PM, Matthew O'Connor wrote:
> Huh, that appears to do it - preventing `noinline` from showing up on 
> defined functions. Thanks.
>
> Out of curiosity, what does that do? And what changed to require this?
>

-O2 has multiple effects.  The obvious effect is the set of optimization 
passes which run, but it also changes the behavior of the frontend.  It 
affects the preprocessor (we set a define with the optimization level), 
and we change how IR is generated in a few cases.

-disable-llvm-passes disables the optimization passes, but doesn't 
affect the other behavior of -O2.

For the change in 4.0 specifically, see https://reviews.llvm.org/D28053 .

-Eli

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project

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