Ramp of lanes <= 1 exception when cross-compile Halide for RISC-V #7070
Description
Tried tutorial https://halide-lang.org/tutorials/tutorial_lesson_11_cross_compilation.html on x86 host machine (Ubuntu 20.04) but for RISC-V target architecture. Unfortunately, there is an exception from IR.cpp. The exception appears only when .vectorize(x, 16) is applied, so problem is somewhere in RISC-V Vectorization support.
Internal Error at /home/dkurt/Halide/src/IR.cpp:272 triggered by user code at : Condition failed: lanes > 1: Ramp of lanes <= 1
Everything is OK locally for x86 target.
- Halide @ 16243da
- LLVM 15.0.2
Code:
#include "Halide.h"
using namespace Halide;
int main(int argc, char** argv) {
Func brighter;
Var x, y;
Param<uint8_t> offset;
ImageParam input(type_of<uint8_t>(), 2);
std::vector<Argument> args(2);
args[0] = input;
args[1] = offset;
brighter(x, y) = input(x, y) + offset;
brighter.bound(x, 0, 64).bound(y, 0, 64);
brighter.vectorize(x, 16).parallel(y);
Target target;
target.os = Target::Linux;
target.arch = Target::RISCV;
target.bits = 64;
std::vector<Target::Feature> features;
features.push_back(Target::RVV);
target.set_features(features);
try {
brighter.compile_to_static_library("compiled", args, "brighter", target);
} catch(Halide::InternalError& ex) {
std::cout << ex.what() << std::endl;
}
}Stacktrace:
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
50 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1 0x00007ffff14d1859 in __GI_abort () at abort.c:79
#2 0x00007ffff175a911 in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#3 0x00007ffff176638c in ?? () from /lib/x86_64-linux-gnu/libstdc++.so.6
#4 0x00007ffff17663f7 in std::terminate() () from /lib/x86_64-linux-gnu/libstdc++.so.6
#5 0x00007ffff176637f in std::rethrow_exception(std::__exception_ptr::exception_ptr) () from /lib/x86_64-linux-gnu/libstdc++.so.6
#6 0x00007ffff2f00062 in Halide::Internal::run_with_large_stack(std::function<void ()> const&) (action=...) at /home/dkurt/Halide/src/Util.cpp:793
#7 0x00007ffff20a2b31 in Halide::Internal::CodeGen_LLVM::compile (this=0x5555556acaf0, input=...) at /home/dkurt/Halide/src/CodeGen_LLVM.cpp:566
#8 0x00007ffff209dc94 in Halide::codegen_llvm (module=..., context=...) at /home/dkurt/Halide/src/CodeGen_LLVM.cpp:41
#9 0x00007ffff24c4cd3 in Halide::compile_module_to_llvm_module (module=..., context=...) at /home/dkurt/Halide/src/LLVM_Output.cpp:410
#10 0x00007ffff252a2cb in Halide::Module::compile (this=0x7fffffffdca8, Python Exception <class 'AttributeError'> 'NoneType' object has no attribute 'pointer':
output_files=std::map with 2 elements) at /home/dkurt/Halide/src/Module.cpp:597
#11 0x00007ffff257049f in Halide::Pipeline::compile_to_static_library (this=0x7fffffffdd40, filename_prefix="compiled", args=std::vector of length 2, capacity 2 = {...},
fn_name="brighter", target=...) at /home/dkurt/Halide/src/Pipeline.cpp:390
#12 0x00007ffff22ba02e in Halide::Func::compile_to_static_library (this=0x7fffffffddd0, filename_prefix="compiled", args=std::vector of length 2, capacity 2 = {...},
fn_name="brighter", target=...) at /home/dkurt/Halide/src/Func.cpp:3325
#13 0x000055555555ab6b in main (argc=1, argv=0x7fffffffe0c8) at /home/dkurt/halide_demo/main.cpp:40