Code generator does not support intrinsic function 'llvm.is.fpclass.f64'

[ReimuNotMoe]

Commit: 8f0ca5e

Test code

nlohmann/json.hpp can be found at here

#include "nlohmann/json.hpp"
#include <iostream>

void aaa() {
	// create an empty structure (null)
	nlohmann::json j;

	// add a number that is stored as double (note the implicit conversion of j to an object)
	j["pi"] = 3.141;

	// add a Boolean that is stored as bool
	j["happy"] = true;

	// add a string that is stored as std::string
	j["name"] = "Niels";

	// add another null object by passing nullptr
	j["nothing"] = nullptr;

	// add an object inside the object
	j["answer"]["everything"] = 42;

	// add an array that is stored as std::vector (using an initializer list)
	j["list"] = { 1, 0, 2 };

	// add another object (using an initializer list of pairs)
	j["object"] = { {"currency", "USD"}, {"value", 42.99} };

	std::string serialized_string = j.dump();

	std::cout << serialized_string << "\n";

}

int main() {
	for (int i=0; i<100; i++) {
		aaa();
	}

	return 123;
}

Output

# clang++-19 -m32 -msoft-float -fno-exceptions -fno-rtti -O0 -g0 -S -emit-llvm -g 1.cpp
# llvm-cbe/build/tools/llvm-cbe/llvm-cbe 1.ll
LLVM ERROR: Code generator does not support intrinsic function 'llvm.is.fpclass.f64'!
 #0 0x00007f7d06ab73c6 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0xeb73c6)
 #1 0x00007f7d06ab5042 llvm::sys::RunSignalHandlers() (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0xeb5042)
 #2 0x00007f7d06ab7a8b (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0xeb7a8b)
 #3 0x00007f7d05a5b050 (/lib/x86_64-linux-gnu/libc.so.6+0x3c050)
 #4 0x00007f7d05aa9ebc __pthread_kill_implementation ./nptl/./nptl/pthread_kill.c:44:76
 #5 0x00007f7d05a5afb2 raise ./signal/../sysdeps/posix/raise.c:27:6
 #6 0x00007f7d05a45472 abort ./stdlib/./stdlib/abort.c:81:7
 #7 0x00007f7d06a0bc24 llvm::report_fatal_error(llvm::Twine const&, bool) (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0xe0bc24)
 #8 0x00007f7d06ddf4f3 (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0x11df4f3)
 #9 0x0000557924541e47 llvm_cbe::CWriter::lowerIntrinsics(llvm::Function&) (/data3/llvm-cbe/build/tools/llvm-cbe/llvm-cbe+0x37e47)
#10 0x000055792452a29d llvm_cbe::CWriter::runOnFunction(llvm::Function&) (/data3/llvm-cbe/build/tools/llvm-cbe/llvm-cbe+0x2029d)
#11 0x00007f7d06c06504 llvm::FPPassManager::runOnFunction(llvm::Function&) (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0x1006504)
#12 0x00007f7d06c0bdf3 llvm::FPPassManager::runOnModule(llvm::Module&) (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0x100bdf3)
#13 0x00007f7d06c06c5e llvm::legacy::PassManagerImpl::run(llvm::Module&) (/usr/lib/llvm-19/lib/libLLVM.so.19.1+0x1006c5e)
#14 0x00005579245201f8 compileModule(char**, llvm::LLVMContext&) llvm-cbe.cpp:0:0
#15 0x000055792451f5ab main (/data3/llvm-cbe/build/tools/llvm-cbe/llvm-cbe+0x155ab)
#16 0x00007f7d05a4624a __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#17 0x00007f7d05a46305 call_init ./csu/../csu/libc-start.c:128:20
#18 0x00007f7d05a46305 __libc_start_main ./csu/../csu/libc-start.c:347:5
#19 0x000055792451ec01 _start (/data3/llvm-cbe/build/tools/llvm-cbe/llvm-cbe+0x14c01)
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: /data3/llvm-cbe/build/tools/llvm-cbe/llvm-cbe 1.ll
1.      Running pass 'Function Pass Manager' on module '1.ll'.
2.      Running pass 'C backend' on function '@_ZSt8isfinited'
[1]    3464385 IOT instruction (core dumped)  llvm-cbe/build/tools/llvm-cbe/llvm-cbe 1.ll