similar to: LLVMTargetMachine with optimization level passed from clang.

I want the optimization to be turned on at -O1 and above. In my case, it is a target independent back-end pass. (Eg: MachinePipeliner) On 2017-01-04 18:10, Mehdi Amini wrote: >> On Jan 4, 2017, at 4:03 PM, Sumanth Gundapaneni via llvm-dev >> <llvm-dev at lists.llvm.org> wrote: >> >> I see the BackendUtil.cpp of Clang creates the TargetMachine with >> the

Here is a problem scenario. I want to enable a backend pass at -O2 or above. if (TM->getOptLevel() >= CodeGenOpt::Default) addPass(&xxxxx); This pass will be run at -O1 too since clang is creating the TargetMachine with CodeGenOpt::Default for -O1. --Sumanth G -----Original Message----- From: mehdi.amini at apple.com [mailto:mehdi.amini at apple.com] Sent: Friday, January 6, 2017

getOptLevel() gets the level from TargetMachine which is created by the Backendutil in clang with either "Default", "None" or "Aggressive". Threre is no correspondence for "Less". This boils down to , if I pass "-O1", the Target Machine is created with CodeGenOpt::Default. I am available on IRC @ sgundapa. -----Original Message----- From:

> -----Original Message----- > From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Mehdi > Amini via llvm-dev > Sent: Friday, January 06, 2017 11:10 AM > To: Sumanth Gundapaneni > Cc: LLVM Developers > Subject: Re: [llvm-dev] LLVMTargetMachine with optimization level passed > from clang. > > > > On Jan 6, 2017, at 10:56 AM, Sumanth

On Tue, Jul 20, 2010 at 3:41 PM, Olivier Meurant <meurant.olivier at gmail.com> wrote: > New patch taking Eli's comments into account. Comments inline. If you have commit access, I'd fire away. If not, I can. diff --git include/llvm/MC/MCAssembler.h include/llvm/MC/MCAssembler.h index 07ca070..afff96e 100644 --- include/llvm/MC/MCAssembler.h +++ include/llvm/MC/MCAssembler.h

On Thu, Jun 4, 2015 at 5:33 PM, Reid Kleckner <rnk at google.com> wrote: > On Thu, Jun 4, 2015 at 5:17 PM, Teresa Johnson <tejohnson at google.com> wrote: >> >> Agreed. Although I assume you mean invoke the new pass under a >> ThinLTO-only option so that avail extern are not dropped in the >> compile pass before the LTO link? > > > No, this pass

On Thu, Jun 4, 2015 at 3:58 PM, Duncan P. N. Exon Smith < dexonsmith at apple.com> wrote: > > > Personally, I think the right approach is to add a bool to > createGlobalDCEPass defaulting to true named something like > IsAfterInlining. In most standard pass pipelines, GlobalDCE runs after > inlining for obvious reasons, so the default makes sense. The special case > is

Andy and I briefly discussed this the other day, we have not yet got chance to list a detailed pass order for the pre- and post- IPO scalar optimizations. This is wish-list in our mind: pre-IPO: based on the ordering he propose, get rid of the inlining (or just inline tiny func), get rid of all loop xforms... post-IPO: get rid of inlining, or maybe we still need it, only

New patch taking Eli's comments into account. Olivier. On Tue, Jul 20, 2010 at 11:09 PM, Eli Friedman <eli.friedman at gmail.com> wrote: > On Tue, Jul 20, 2010 at 1:36 PM, Olivier Meurant > <meurant.olivier at gmail.com> wrote: >>> Seems reasonable, but I haven't looked at the code yet. I would >>> suggest trying to split your work up into separate

Well, 'optnone' is already not identical to -O0, and given the nature of things, probably can't be; but I am persuaded that it's reasonable for it to honor the -fast-isel option as a debugging tactic. I'll take an AI to make this happen. Thanks, --paulr P.S. One nit, the "O0 + optnone" case should not have an asterisk, the FastISel flag is not manipulated if the opt

Hi Ankur, > The flags "-view-sched-dags".. described in the doc doesn't seem to work. ( > "llc -help" doesn't list it ). as far as I remember, displaying DAGs during compilation is only enabled in "debug builds" [1] of LLVM. You probably have to re-configure and re-compile LLVM to enable this feature. Best regards, Christoph [1]

I found the following problem when I try to debug "target does not support mc emission" in linux (the same code executes OK in windows): Below is a snippet extracted from this method, if (UseMCJIT && ExecutionEngine::MCJITCtor) { ExecutionEngine *EE = ExecutionEngine::MCJITCtor(M, ErrorStr, JMM, OptLevel,

I am trying to understand the SelectionDAG construction from LLVM IR. I have gone through the doc "The LLVM Target-Independent Code Generator" on LLVM site. This gives a great initial overview. However I am unable to catch the actual control flow for the llvm->selectionDag conversion. The flags "-view-sched-dags".. described in the doc doesn't seem to work. ( "llc

Hi, AFAIK, the tools "symbolizer, objdump and nm" need a demangler. I see there is libcxxabi which provides the demangle library. But there is no support to build libcxxabi on windows with MSVC. This left a huge void and my symbolizer cannot work on Windows if built with MSVC. Instead of mucking around OS dependencies, why shouldn't we have a demangle library in LLVM.

Hi, I found some different discrepancy on how Subtarget is created between some arch specific TargetMachine constructor. For example, for BPF/Lanai: BPFTargetMachine::BPFTargetMachine(const Target &T, const Triple &TT, StringRef CPU, StringRef FS, const TargetOptions &Options,

Hi, I see there is an inconsistency in LLVM libc calls. For a modulo (reminder) operation, clang -target arm-none-linux-gnueabi generates "__modsi3". clang -target arm-none-eabi generates "__aeabi_idivmod" clang -target arm-linux-androideabi generates "__modsi3" Android bionic libc doesn't provide a __modsi3, instead it provides

Hi, I am observing a deadlock with llvm-lit on windows 7. When I attached a debugger, the communicate() call is blocked. In file utils/lit/lit/TestRunner.py > # FIXME: There is probably still deadlock potential here. Yawn. > procData = [None] * len(procs) > procData[-1] = procs[-1].communicate() I am invoking python directly on windows to run the unit tests.

I reacted as per my case. You need CFLAGS in order to what linker you might be using. In case of clang, you can use “-fuse-ld” to control the invocation of linker. In my opinion, it is not necessary to carry forward LDFLAGS unless you want to control specific parts of the linker. In my case, I have a cross compiler for ARM and I usually compile the code with Clang

Hi, I wonder if this is a valid flag in either clang/gcc. The flag in question is "-march=aarch64". I verified with latest tip and neither clang nor gcc fail to recognize this flag. This piece of code is in cmake/config-ix.cmake in compiler-rt repo. + elseif("${COMPILER_RT_TEST_TARGET_ARCH}" MATCHES "aarch64") + test_target_arch(aarch64

On 28 July 2015 at 17:52, Sumanth Gundapaneni <sgundapa at codeaurora.org> wrote: > Android bionic libc doesn’t provide a __modsi3, instead it provides > “__aeabi_idivmod”. Hi Sumanth, Have a look at ARMSubtarget.h, functions: bool isTargetAEABI() They control the lowering of DIV/MOD calls in ARMISelLowering.cpp. Maybe Android needs to be in? cheers, --renato