Hi,

Thank you for paying attention.

I confimred again on my AArch64 machine. At least, your commit triggered a 
regression.

The compiler abends when compiling a Fortran program 
https://github.com/fujitsu/compiler-test-suite/blob/main/Fortran/0341/0341_0409.f90
 as below.

----------------------------------------------------------------
$ flang -target aarch64-unknown-linux-gnu -O2 -march=armv8.2-a+sve 
Fortran/0341/0341_0409.f90
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and 
include the crash backtrace.
Stack dump:
0.      Program arguments: /llvm/bin/flang -fc1 -triple 
aarch64-unknown-linux-gnu -emit-obj -fcolor-diagnostics -mrelocation-model pic 
-pic-level 2 -pic-is-pie -target-cpu generic -target-feature +outline-atomics 
-target-feature +v8.2a -target-feature +crc -target-feature +fp-armv8 
-target-feature +fullfp16 -target-feature +lse -target-feature +neon 
-target-feature +ras -target-feature +rdm -target-feature +sve -resource-dir 
/llvm/lib/clang/20 -mframe-pointer=non-leaf -O2 -o /tmp/0341_0409-a1fa36.o -x 
f95-cpp-input Fortran/0341/0341_0409.f90
1.      Running pass 'Function Pass Manager' on module 'FIRModule'.
2.      Running pass 'Interleaved Access Pass' on function '@sub1_'
 #0 0x0000ffffa10eacf8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) 
(/llvm/lib/libLLVMSupport.so.20.0git+0x24acf8)
 #1 0x0000ffffa10e83f0 llvm::sys::RunSignalHandlers() 
(/llvm/lib/libLLVMSupport.so.20.0git+0x2483f0)
 #2 0x0000ffffa10e8548 SignalHandler(int) Signals.cpp:0:0
 #3 0x0000ffffa37407a0 (linux-vdso.so.1+0x7a0)
 #4 0x0000ffff9e297e64 llvm::Instruction::eraseFromParent() 
(/llvm/lib/libLLVMCore.so.20.0git+0x427e64)
 #5 0x0000ffff9f9ca728 (anonymous 
namespace)::InterleavedAccessImpl::runOnFunction(llvm::Function&) 
InterleavedAccessPass.cpp:0:0
 #6 0x0000ffff9e2e71c8 llvm::FPPassManager::runOnFunction(llvm::Function&) 
(/llvm/lib/libLLVMCore.so.20.0git+0x4771c8)
 #7 0x0000ffff9e2e73cc llvm::FPPassManager::runOnModule(llvm::Module&) 
(/llvm/lib/libLLVMCore.so.20.0git+0x4773cc)
 #8 0x0000ffff9e2e8040 llvm::legacy::PassManagerImpl::run(llvm::Module&) 
(/llvm/lib/libLLVMCore.so.20.0git+0x478040)
 #9 0x0000ffffa20e8918 Fortran::frontend::CodeGenAction::executeAction() 
(/llvm/lib/libflangFrontend.so.20.0git+0x128918)
#10 0x0000ffffa2020fdc Fortran::frontend::FrontendAction::execute() 
(/llvm/lib/libflangFrontend.so.20.0git+0x60fdc)
#11 0x0000ffffa2011890 
Fortran::frontend::CompilerInstance::executeAction(Fortran::frontend::FrontendAction&)
 (/llvm/lib/libflangFrontend.so.20.0git+0x51890)
#12 0x0000ffffa2594b8c 
Fortran::frontend::executeCompilerInvocation(Fortran::frontend::CompilerInstance*)
 (/llvm/lib/libflangFrontendTool.so.20.0git+0x14b8c)
#13 0x0000aaaacb935734 fc1_main(llvm::ArrayRef<char const*>, char const*) 
(/llvm/bin/flang+0x15734)
#14 0x0000aaaacb935060 main (/llvm/bin/flang+0x15060)
#15 0x0000ffffa0a684c4 (/lib/aarch64-linux-gnu/libc.so.6+0x284c4)
#16 0x0000ffffa0a68598 __libc_start_main 
(/lib/aarch64-linux-gnu/libc.so.6+0x28598)
#17 0x0000aaaacb9335f0 _start (/llvm/bin/flang+0x135f0)
flang-20: error: unable to execute command: Segmentation fault (core dumped)
flang-20: error: flang frontend command failed due to signal (use -v to see 
invocation)
flang version 20.0.0git
Target: aarch64-unknown-linux-gnu
Thread model: posix
InstalledDir: /llvm/bin
Build config: +assertions
----------------------------------------------------------------

Before your commit ccfe0de0e1, this abend doesn't happen.

As you may know, your commit was reverted by 332d2647ff and this abend doesn't 
happen in the latest LLVM dev revision.

Best regards,
Takahiro Kawashima,
Fujitsu

> Hello everyone.
> Is that regression is definitely caused by my patch ?
> 
> Best Regards,
> Hassnaa.
> 
> 
> From: ci_not...@linaro.org <ci_not...@linaro.org>
> Date: Saturday, 28 December 2024 at 5:41 AM
> To: ohno.yasuy...@fujitsu.com <ohno.yasuy...@fujitsu.com>, 
> itou.tets...@fujitsu.com <itou.tets...@fujitsu.com>, t-kawash...@fujitsu.com 
> <t-kawash...@fujitsu.com>
> Cc: maxim.kuvyr...@linaro.org <maxim.kuvyr...@linaro.org>, Hassnaa Hamdi 
> <hassnaa.ha...@arm.com>
> Subject: [Linaro-TCWG-CI] llvmorg-20-init-16411-gccfe0de0e1e3: 1 regressions 
> on aarch64
> Dear contributor,
> 
> Our automatic CI has detected problems related to your patch(es). Please find 
> some details below.
> 
> In 
> tcwg_flang_test/main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays, 
> after:
>   | commit llvmorg-20-init-16411-gccfe0de0e1e3
>   | Author: Hassnaa Hamdi <hassnaa.ha...@arm.com>
>   | Date:   Fri Dec 27 12:42:07 2024 +0000
>   |
>   |     [LV]: Teach LV to recursively (de)interleave.  (#89018)
>   |
>   |     Currently available intrinsics are only ld2/st2, which don't support 
> interleaving factor > 2.
>   |     This patch teaches the LV to use ld2/st2 recursively to support high
>   |     interleaving factors.
> 
> Produces 1 regressions:
>   | Running test-suite:Fujitsu/Fortran/0341 ...
>   | NOEXE: test-suite :: Fujitsu/Fortran/0341/Fujitsu-Fortran-0341_0409.test
>   | # "NOEXE" means : the test program cannot be compiled
> 
> Used configuration :
>   * Toolchain : cmake -G Ninja  ../llvm/llvm 
> "-DLLVM_ENABLE_PROJECTS=clang;lld;flang;openmp;clang-tools-extra"     
> -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=True          
> -DCMAKE_INSTALL_PREFIX=../llvm-install    "-DLLVM_TARGETS_TO_BUILD=AArch64" 
> -DCLANG_DEFAULT_LINKER=lld
>   * Testsuite : export 
> LD_LIBRARY_PATH=$\WORKSPACE/llvm-install/lib/aarch64-unknown-linux-gnu$\{LD_LIBRARY_PATH:+:$\LD_LIBRARY_PATH}
>  cmake -GNinja    -DCMAKE_C_COMPILER="$\WORKSPACE/llvm-install/bin/clang"  
> -DCMAKE_CXX_COMPILER="$\WORKSPACE/llvm-install/bin/clang++"      
> -DCMAKE_Fortran_COMPILER="$\WORKSPACE/llvm-install/bin/flang-new"        
> -DCMAKE_BUILD_TYPE=Release       -DCMAKE_C_FLAGS= -DCMAKE_CXX_FLAGS= 
> -DCMAKE_Fortran_FLAGS=       -DCMAKE_C_FLAGS_RELEASE="-O3 -mcpu=neoverse-v1 
> -msve-vector-bits=scalable -mllvm -scalable-vectorization=preferred -mllvm 
> -treat-scalable-fixed-error-as-warning=false -mllvm -aarch64-enable-pipeliner 
> -mllvm -pipeliner-mve-cg -DNDEBUG"       -DCMAKE_CXX_FLAGS_RELEASE="-O3 
> -mcpu=neoverse-v1 -msve-vector-bits=scalable -mllvm 
> -scalable-vectorization=preferred -mllvm 
> -treat-scalable-fixed-error-as-warning=false -mllvm -aarch64-enable-pipeliner 
> -mllvm -pipeliner-mve-cg -DNDEBUG"     -DCMAKE_Fortran_FLAGS_RELEASE="-O3 
> -mcpu=neoverse-v1 -msve-vector-bits=scalable -mllvm 
> -scalable-vectorization=preferred -mllvm 
> -treat-scalable-fixed-error-as-warning=false -mllvm -aarch64-enable-pipelin
 er -mllvm -pipeliner-mve-cg -DNDEBUG -fstack-arrays"  -DTEST_SUITE_FORTRAN=ON  
-DTEST_SUITE_SUBDIRS=Fujitsu     "$\WORKSPACE/test/test-suite"
> 
> We track this bug report under https://linaro.atlassian.net/browse/LLVM-1494. 
> Please let us know if you have a fix.
> 
> If you have any questions regarding this report, please ask on 
> linaro-toolchain@lists.linaro.org mailing list.
> 
> -----------------8<--------------------------8<--------------------------8<--------------------------
> 
> The information below contains the details of the failures, and the ways to 
> reproduce a debug environment:
> 
> You can find the failure logs in *.log.1.xz files in
>  * 
> https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays-build/250/artifact/artifacts/00-sumfiles/
> The full lists of regressions and improvements as well as configure and make 
> commands are in
>  * 
> https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays-build/250/artifact/artifacts/notify/
> The list of [ignored] baseline and flaky failures are in
>  * 
> https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays-build/250/artifact/artifacts/sumfiles/xfails.xfail
> 
> Fujitsu testsuite : https://github.com/fujitsu/compiler-test-suite/
> 
> Current build   : 
> https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays-build/250/artifact/artifacts
> Reference build : 
> https://ci.linaro.org/job/tcwg_flang_test--main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays-build/249/artifact/artifacts
> 
> Instruction to reproduce the build : 
> https://git-us.linaro.org/toolchain/ci/interesting-commits.git/plain/llvm/sha1/ccfe0de0e1e37ed369c9bf89dd0188ba0afb2e9a/tcwg_flang_test/main-aarch64-O3-neoverse_v1-sve_vla-mpipeliner-stack_arrays/reproduction_instructions.txt
> 
> Full commit : 
> https://github.com/llvm/llvm-project/commit/ccfe0de0e1e37ed369c9bf89dd0188ba0afb2e9a
> IMPORTANT NOTICE: The contents of this email and any attachments are 
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