[LLVMbugs] [Bug 4773] New: simple float[3] vector usage leads to llc failure

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4773

           Summary: simple float[3] vector usage leads to llc failure
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: brian.e.paul at gmail.com
                CC: llvmbugs at cs.uiuc.edu


The following code (vec3.c):

typedef __attribute__(( ext_vector_type(3) )) float vec3;

vec3 sum(vec3 a, vec3 b)
{
   return a + b;
}


Causes clang/llc to fail when compiled with:

$ clang -S vec3.c -o vec3.s
Return operand #2 has unhandled type f32UNREACHABLE executed at
CallingConvLower.cpp:93!
0   clang-cc  0x0913070c
1   clang-cc  0x09130cd8
2             0x00110400 __kernel_sigreturn + 0
3   libc.so.6 0x0036ae18 abort + 392
4   clang-cc  0x091111e4
5   clang-cc  0x08c1ff43
6   clang-cc  0x08be174d
7   clang-cc  0x08ca7e17
8   clang-cc  0x08ca7f53
9   clang-cc  0x08ca8456
10  clang-cc  0x08cbe3ca
11  clang-cc  0x08cbeed4
12  clang-cc  0x08cbfd56
13  clang-cc  0x08da8b9e
14  clang-cc  0x090a5d61
15  clang-cc  0x090a6864
16  clang-cc  0x090a6a31
17  clang-cc  0x080955ec
18  clang-cc  0x080956ea
19  clang-cc  0x082fcebe
20  clang-cc  0x080717a1
21  clang-cc  0x080734d4 main + 3320
22  libc.so.6 0x003546d5 __libc_start_main + 229
23  clang-cc  0x08069701
Stack dump:
0.      Program arguments: /home/local/bin/../libexec/clang-cc -triple
i386-pc-linux-gnu -S -disable-free -main-file-name vec3.c --relocation-model
static --disable-fp-elim --unwind-tables=0 --mcpu=pentium4 --fmath-errno=1
-fdiagnostics-show-option -o vec3.s -x c vec3.c 
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'X86 DAG->DAG Instruction Selection' on function
'@vec3_sum'
clang: error: compiler command failed due to signal 6 (use -v to see
invocation)


I'm using llvm/clang from SVN on Aug 26, 2009, debug build on x86-32.


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