search for: inlinin

Hi, (sorry if the CC's are inappropriate, they seemed relevant based on a git log of IRMover.cpp) I'm using LLVM to implement Just-in-Time compilation for PostgreSQL. One part of that is doing inlining of operators. For that I'm using bitcode pre-generated using clang. The current code uses a single LLVMContext & Orc to generate the code. That largely workes well. But inlining presents a bit of a problem. (end of setup) I've tried two approaches to inlining: In the first I'm...

...via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hi, > > (sorry if the CC's are inappropriate, they seemed relevant based on a > git log of IRMover.cpp) > > I'm using LLVM to implement Just-in-Time compilation for PostgreSQL. One > part of that is doing inlining of operators. For that I'm using bitcode > pre-generated using clang. > > The current code uses a single LLVMContext & Orc to generate the > code. That largely workes well. But inlining presents a bit of a > problem. > > (end of setup) > > I've tried two...

...already.) grepping around I only found additions or lookups in the relevant datastructures. > > > Therefore the first approach seems preferable by far. > > > > What I'm observing is that creating the same Module contents (modulo > > some constants) twice and then inlining a number of Modules > > It's not exactly clear to me what you mean by "inlining a module". > Are you linking one module into another, and then inlining those > functions? Or just linking? Sorry for the imprecision. Yes, I'm using IRMover to link subsets of a module...

Hi folks, I am wondering about the relationship clang, opt and llc. I understand that this has been asked, e.g., http://stackoverflow.com/questions/40350990/relationship-between-clang-opt-llc-and-llvm-linker. Sorry for posting a similar question again, but I still have something that hasn't been resolved yet. More specifically I am wondering about the following two approaches compiling

...ses that want to use profile data (block layout and regalloc). However, it does nothing to help module passes. Notably, the inliner. What Dehao has found in his experience with GCC is that in order to help the inliner, SamplePGO needs to become a module pass. Mainly, it needs to be able to affect inlining decisions. If a branch into a call site has many samples, we want to tell the inliner about it so it increases the inlinining score for that call site. Additionally, SamplePGO may need to actually perform some inlining before the inliner runs. This is needed to better match the samples obtained...

> On Apr 10, 2017, at 5:21 PM, Craig Topper via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > clang -O0 does not disable all optimization passes modify the IR.; In fact it causes most functions to get tagged with noinline to prevent inlinining It also disable lifetime instrinsics emission and TBAA, etc. > > What you really need to do is > > clang -O3 -c emit-llvm -o source.bc -v > > Find the -cc1 command line from that output. Execute that command with --disable-llvm-passes. leave the -O3 and everything else....

...i.amini at apple.com> wrote: > > On Apr 10, 2017, at 5:21 PM, Craig Topper via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > clang -O0 does not disable all optimization passes modify the IR.; In fact > it causes most functions to get tagged with noinline to prevent inlinining > > > It also disable lifetime instrinsics emission and TBAA, etc. > > > > What you really need to do is > > clang -O3 -c emit-llvm -o source.bc -v > > Find the -cc1 command line from that output. Execute that command with > --disable-llvm-passes. leave the -O...

...>> >> On Apr 10, 2017, at 5:21 PM, Craig Topper via llvm-dev < >> llvm-dev at lists.llvm.org> wrote: >> >> clang -O0 does not disable all optimization passes modify the IR.; In >> fact it causes most functions to get tagged with noinline to prevent >> inlinining >> >> >> It also disable lifetime instrinsics emission and TBAA, etc. >> >> >> >> What you really need to do is >> >> clang -O3 -c emit-llvm -o source.bc -v >> >> Find the -cc1 command line from that output. Execute that command w...

...tly passed in and the ones used by modules the LLVMContext knows about. > >> >>> Therefore the first approach seems preferable by far. >>> >>> What I'm observing is that creating the same Module contents (modulo >>> some constants) twice and then inlining a number of Modules >> >> It's not exactly clear to me what you mean by "inlining a module". >> Are you linking one module into another, and then inlining those >> functions? Or just linking? > > Sorry for the imprecision. Yes, I'm using IRMover t...

...Apr 10, 2017, at 5:21 PM, Craig Topper via llvm-dev < >>> llvm-dev at lists.llvm.org> wrote: >>> >>> clang -O0 does not disable all optimization passes modify the IR.; In >>> fact it causes most functions to get tagged with noinline to prevent >>> inlinining >>> >>> >>> It also disable lifetime instrinsics emission and TBAA, etc. >>> >>> >>> >>> What you really need to do is >>> >>> clang -O3 -c emit-llvm -o source.bc -v >>> >>> Find the -cc1 command l...

...via llvm-dev < >>>>> llvm-dev at lists.llvm.org> wrote: >>>>> >>>>> clang -O0 does not disable all optimization passes modify the IR.; In >>>>> fact it causes most functions to get tagged with noinline to prevent >>>>> inlinining >>>>> >>>>> >>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>> >>>>> >>>>> >>>>> What you really need to do is >>>>> >>>>> clang -O3 -c emi...

...21 PM, Craig Topper via llvm-dev < >>>> llvm-dev at lists.llvm.org> wrote: >>>> >>>> clang -O0 does not disable all optimization passes modify the IR.; In >>>> fact it causes most functions to get tagged with noinline to prevent >>>> inlinining >>>> >>>> >>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>> >>>> >>>> >>>> What you really need to do is >>>> >>>> clang -O3 -c emit-llvm -o source.bc -v >>>&...

...t;>>>>> llvm-dev at lists.llvm.org> wrote: >>>>>> >>>>>> clang -O0 does not disable all optimization passes modify the IR.; In >>>>>> fact it causes most functions to get tagged with noinline to prevent >>>>>> inlinining >>>>>> >>>>>> >>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>> >>>>>> >>>>>> >>>>>> What you really need to do is >>>>>> >&...

...directly from the profile? The profile should contain call >>>>> sites and their sample counts and you could match these up with relocations >>>>> (calls) in the section? >>>> >>>> >>> The main reason is that IPO transformations such as inlining and >>> clonining will change the hotness of functions, so the original profile can >>> not be directly for the purpose of function layout. There is a similar >>> support in Gold plugin for Google GCC. >>> >> >> Will this cause issues with ThinLTO?...

...t;> llvm-dev at lists.llvm.org> wrote: >>>>>>> >>>>>>> clang -O0 does not disable all optimization passes modify the IR.; >>>>>>> In fact it causes most functions to get tagged with noinline to prevent >>>>>>> inlinining >>>>>>> >>>>>>> >>>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>>> >>>>>>> >>>>>>> >>>>>>> What you really need to do is &g...

...t;> llvm-dev at lists.llvm.org> wrote: >>>>>>> >>>>>>> clang -O0 does not disable all optimization passes modify the IR.; >>>>>>> In fact it causes most functions to get tagged with noinline to prevent >>>>>>> inlinining >>>>>>> >>>>>>> >>>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>>> >>>>>>> >>>>>>> >>>>>>> What you really need to do is &g...

...t;> llvm-dev at lists.llvm.org> wrote: >>>>>>> >>>>>>> clang -O0 does not disable all optimization passes modify the IR.; >>>>>>> In fact it causes most functions to get tagged with noinline to prevent >>>>>>> inlinining >>>>>>> >>>>>>> >>>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>>> >>>>>>> >>>>>>> >>>>>>> What you really need to do is &g...

...at lists.llvm.org> wrote: >>>>>>>> >>>>>>>> clang -O0 does not disable all optimization passes modify the IR.; >>>>>>>> In fact it causes most functions to get tagged with noinline to prevent >>>>>>>> inlinining >>>>>>>> >>>>>>>> >>>>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> What...

...at lists.llvm.org> wrote: >>>>>>>> >>>>>>>> clang -O0 does not disable all optimization passes modify the IR.; >>>>>>>> In fact it causes most functions to get tagged with noinline to prevent >>>>>>>> inlinining >>>>>>>> >>>>>>>> >>>>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> What...

...at lists.llvm.org> wrote: >>>>>>>> >>>>>>>> clang -O0 does not disable all optimization passes modify the IR.; >>>>>>>> In fact it causes most functions to get tagged with noinline to prevent >>>>>>>> inlinining >>>>>>>> >>>>>>>> >>>>>>>> It also disable lifetime instrinsics emission and TBAA, etc. >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> What...