kito-cheng wrote:
A test case will crash, missing `+` before `zbc`:
```
__attribute__((target_clones("default", "arch=+zbb,zbc;priority=-1",
"priority=-2;arch=+zba", "priority=3;arch=+zbb,+zba"))) int foo1(void) { return
2; }
int bar() { return foo1(); }
```
```
$ clang -cc1 -triple riscv64-linux-gnu -target-feature +i -emit-llvm foo.c
clang:
/home/kitoc/llvm-workspace/llvm-project/llvm/lib/TargetParser/RISCVISAInfo.cpp:455:
static llvm::Expected<std::unique_ptr<llvm::RISCVISAInfo> >
llvm::RISCVISAInfo::parseFeatures(unsigned int, const
std::vector<std::__cxx11::basic_string<char> >&): Assertion `ExtName.size() > 1
&& (ExtName[0] == '+' || ExtName[0] == '-')' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and
include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: ./bin/clang -cc1 -triple riscv64-linux-gnu
-target-feature +i -emit-llvm attr-target-clones-riscv.c
1. attr-target-clones-riscv.c:7:1: current parser token 'int'
2. attr-target-clones-riscv.c:4:130: LLVM IR generation of declaration
'foo1'
3. attr-target-clones-riscv.c:4:130: Generating code for declaration 'foo1'
#0 0x00007f4ed63e00d0 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int)
(/scratch/kitoc/llvm-workspace/build-upstream/bin/../lib/libLLVMSupport.so.20.0git+0x1e00d0)
...
#11 0x00007f4eda71a854 llvm::RISCVISAInfo::parseFeatures(unsigned int,
std::vector<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>, std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>>> const&)
(/scratch/kitoc/llvm-workspace/build-upstream/bin/../lib/libLLVMTargetParser.so.20.0git+0x3d854)
#12 0x00007f4ed825b8e0
clang::targets::RISCVTargetInfo::initFeatureMap(llvm::StringMap<bool,
llvm::MallocAllocator>&, clang::DiagnosticsEngine&, llvm::StringRef,
std::vector<std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char>>, std::allocator<std::__cxx11::basic_string<char,
std::char_traits<char>, std::allocator<char>>>> const&) const
(/scratch/kitoc/llvm-workspace/build-upstream/bin/../lib/libclangBasic.so.20.0git+0x45b8e0)
...
Aborted (core dumped)
```
https://github.com/llvm/llvm-project/pull/85786
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