Open EdSchouten opened 6 years ago
I thought you might be interested in this bug report. I've observed that the following code:
int main() { return __builtin_flt_rounds(); }
Causes Clang r318692 to crash as follows:
08:50:29 ed@x ~ $ riscv64-unknown-cloudabi-cc -o bla bla.c #0 0x0000000001a82748 llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/local/riscv-llvm/bin/clang-6.0+0x1a82748) #1 0x0000000001a82cf6 SignalHandler(int) (/usr/local/riscv-llvm/bin/clang-6.0+0x1a82cf6) #2 0x00000008047288f6 handle_signal /usr/src/lib/libthr/thread/thr_sig.c:0:3 #3 0x0000000804727e9f thr_sighandler /usr/src/lib/libthr/thread/thr_sig.c:190:1 Stack dump: 0. Program arguments: /usr/local/riscv-llvm/bin/clang-6.0 -cc1 -triple riscv64-unknown-cloudabi -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name bla.c -mrelocation-model static -mthread-model posix -mdisable-fp-elim -masm-verbose -mconstructor-aliases -target-abi lp64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/local/riscv-llvm/lib/clang/6.0.0 -fdebug-compilation-dir /home/ed -ferror-limit 19 -fmessage-length 177 -fsanitize=safe-stack -fno-signed-char -fobjc-runtime=gnustep -fdiagnostics-show-option -fcolor-diagnostics -o /tmp/bla-8c659e.o -x c bla.c 1. <eof> parser at end of file 2. Code generation 3. Running pass 'Function Pass Manager' on module 'bla.c'. 4. Running pass 'RISCV DAG->DAG Pattern Instruction Selection' on function '@main' clang-6.0: error: unable to execute command: Segmentation fault (core dumped) clang-6.0: error: clang frontend command failed due to signal (use -v to see invocation) clang version 6.0.0 (trunk 318692) Target: riscv64-unknown-cloudabi Thread model: posix InstalledDir: /usr/local/bin clang-6.0: note: diagnostic msg: PLEASE submit a bug report to http://llvm.org/bugs/ and include the crash backtrace, preprocessed source, and associated run script. clang-6.0: note: diagnostic msg: ******************** PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: Preprocessed source(s) and associated run script(s) are located at: clang-6.0: note: diagnostic msg: /tmp/bla-f7f5ca.c clang-6.0: note: diagnostic msg: /tmp/bla-f7f5ca.sh clang-6.0: note: diagnostic msg: ********************
I thought you might be interested in this bug report. I've observed that the following code:
Causes Clang r318692 to crash as follows: