[LLVMbugs] [Bug 17045] New: ICE with 64-bit __sync_val_compare_and_swap on ARM

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17045

            Bug ID: 17045
           Summary: ICE with 64-bit __sync_val_compare_and_swap on ARM
           Product: clang
           Version: 3.2
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: LLVM Codegen
          Assignee: unassignedclangbugs at nondot.org
          Reporter: alex at lycus.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

The code triggering the bug:

unsigned long long int i;

int main() {
    __sync_val_compare_and_swap (&i, 0, 0);
}

Result:

Stack dump:
0.      Program arguments: /usr/bin/clang -cc1 -triple
armv4t-unknown-linux-gnueabi -S -disable-free -disable-llvm-verifier
-main-file-name test.c -mrelocation-model static -mdisable-fp-elim -fmath-errno
-mconstructor-aliases -fuse-init-array -target-abi aapcs-linux -target-cpu
arm7tdmi -msoft-float -mfloat-abi soft -target-feature +soft-float
-target-feature +soft-float-abi -target-feature -neon -target-linker-version
2.23.52.20130620 -momit-leaf-frame-pointer -resource-dir
/usr/bin/../lib/clang/3.2 -fmodule-cache-path /var/tmp/clang-module-cache
-internal-isystem /usr/local/include -internal-isystem
/usr/bin/../lib/clang/3.2/include -internal-isystem
/usr/include/clang/3.2/include/ -internal-externc-isystem
/usr/include/arm-linux-gnueabi -internal-externc-isystem
/usr/include/arm-linux-gnueabi -internal-externc-isystem /usr/include
-fno-dwarf-directory-asm -fdebug-compilation-dir /home/zor/tests -ferror-limit
19 -fmessage-length 125 -mstackrealign -fno-signed-char -fobjc-runtime=gcc
-fdiagnostics-show-option -fcolor-diagnostics -o /tmp/test-H4cbps.s -x c test.c
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'test.c'.
4.      Running pass 'ARM Instruction Selection' on function '@main'
clang: error: unable to execute command: Segmentation fault
clang: error: clang frontend command failed due to signal (use -v to see
invocation)
Debian clang version 3.2-10 (tags/RELEASE_32/final) (based on LLVM 3.2)
Target: arm-unknown-linux-gnueabi
Thread model: posix

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