clang hangs when compiling simple program

Clang Frontend
1

Clang has recently started hanging when compiling the following program from the GCC testsuite. It had been working fine until a recent change (in the past couple days). I've update from the trunk and done a clean rebuild but still have the problem. Does anyone else have the same issue?

$ clang -cc1 -nostdinc -triple=arm- -emit-llvm-bc /tmp/z.c -o /tmp/z.bc

int
main (void)
{
     long j = 0x40000000;
     if ((unsigned int) (0x40000000 + j) < 0L)
         abort ();

     return 0;
}

2

john@ubuntu:~/src$ /usr/local/src/llvm/Release/bin/clang -cc1 -nostdinc -triple=arm- -emit-llvm-bc z.c -o z.bc
z.c:6:41: warning: comparison of unsigned expression < 0 is always false
if ((unsigned int) (0x40000000 + j) < 0L)

z.c:7:9: warning: implicitly declaring C library function 'abort' with type 'void (void)'
abort ();
^
z.c:7:9: note: please include the header <stdlib.h> or explicitly provide a declaration for 'abort'
2 warnings generated.
john@ubuntu:~/src$ /usr/local/src/llvm/Release/bin/clang --version
clang version 2.9 (trunk 115637)
Target: x86_64-unknown-linux-gnu
Thread model: posix
john@ubuntu:~/src$ cat z.c

int
main (void)
{
long j = 0x40000000;
if ((unsigned int) (0x40000000 + j) < 0L)
abort ();

return 0;
}
3

Thanks

I guess I should have mentioned I'm using Debug + Asserts configuration on OSX.

$ clang --version
clang version 2.9 (trunk 115977)
Target: x86_64-apple-darwin10
Thread model: posix

The last version I know worked for me was about 115329. I'll have to try a full reconfigure and rebuild.

4

It is very likely that this was introduced by me in r115725 and
fixed by Argyrios in r115985, so please let us know if it's still failing with ToT.

John.

5

Thanks, it appears fixed in 116003.