Dear LLVM:
I wrote a small testcase and I can compiler and run it with gcc, But with
llvm, I got weird error like the following. I really don't know what's
going on. Could you explain? Thanks a lot -Jerry
Error Message:
xli3|csil-suna38|~/mp2|[25]% llvmgcc testcase3.c
testcase3.c: In function `init':
testcase3.c:5: warning: cast to pointer from integer of different size
/usr/dcs/projects/cs426/Software/gcc_install/bin/../lib/gcc-lib/llvm/3.1/as:
/var/tmp//cc7nkKdc.s:428: Redefinition of value named 'reg213' in the
'int
*' type plane!
My code:
/* --------------------testcase -----------------------*/
#include <stdio.h>
int *init(int size)
{
int *a = (int *)malloc(size);
return a;
}
int main()
{
int *c;
c = init(5);
printf("c[1]=%d\n", c[1]);
free( c );
return;
}
shouldn't the malloc() be something like malloc(sizeof(int)*size)? You're allocating 5 bytes, which is probably not the size of an int in llvm (it's definitely not the size of an int in sparc), and later you're trying to access c[1], which starts at byte 4 but is out of bounds. On Fri, 1 Nov 2002, Xiaodong Li wrote:> Dear LLVM: > > I wrote a small testcase and I can compiler and run it with gcc, But with > llvm, I got weird error like the following. I really don't know what's > going on. Could you explain? Thanks a lot -Jerry > > Error Message: > xli3|csil-suna38|~/mp2|[25]% llvmgcc testcase3.c > testcase3.c: In function `init': > testcase3.c:5: warning: cast to pointer from integer of different size > /usr/dcs/projects/cs426/Software/gcc_install/bin/../lib/gcc-lib/llvm/3.1/as: > /var/tmp//cc7nkKdc.s:428: Redefinition of value named 'reg213' in the 'int > *' type plane! > > My code: > /* --------------------testcase -----------------------*/ > #include <stdio.h> > int *init(int size) > { > int *a = (int *)malloc(size); > return a; > } > int main() > { > int *c; > c = init(5); > printf("c[1]=%d\n", c[1]); > free( c ); > return; > } > > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev >Juan Nicolas Ruiz | Dept. of Computer Science Quidquid latine dictum sit, altum viditur. | Univ. of Illinois (Whatever is said in Latin sounds profound)| #213 CSL, +1-217-244-1134
> shouldn't the malloc() be something like malloc(sizeof(int)*size)? > > You're allocating 5 bytes, which is probably not the size of an int in > llvm (it's definitely not the size of an int in sparc), and later > you're trying to access c[1], which starts at byte 4 but is out of > bounds.It's true that it's not semantically correct code (whatever that means), but it _should_ compile. I can reproduce the problem here, so I'll look into what it will take to fix it. -Chris> > Dear LLVM: > > > > I wrote a small testcase and I can compiler and run it with gcc, But with > > llvm, I got weird error like the following. I really don't know what's > > going on. Could you explain? Thanks a lot -Jerry > > > > Error Message: > > xli3|csil-suna38|~/mp2|[25]% llvmgcc testcase3.c > > testcase3.c: In function `init': > > testcase3.c:5: warning: cast to pointer from integer of different size > > /usr/dcs/projects/cs426/Software/gcc_install/bin/../lib/gcc-lib/llvm/3.1/as: > > /var/tmp//cc7nkKdc.s:428: Redefinition of value named 'reg213' in the 'int > > *' type plane! > > > > My code: > > /* --------------------testcase -----------------------*/ > > #include <stdio.h> > > int *init(int size) > > { > > int *a = (int *)malloc(size); > > return a; > > } > > int main() > > { > > int *c; > > c = init(5); > > printf("c[1]=%d\n", c[1]); > > free( c ); > > return; > > } > > > > > > _______________________________________________ > > LLVM Developers mailing list > > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > > http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev > > > > Juan Nicolas Ruiz | Dept. of Computer Science > Quidquid latine dictum sit, altum viditur. | Univ. of Illinois > (Whatever is said in Latin sounds profound)| #213 CSL, +1-217-244-1134 > > _______________________________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://mail.cs.uiuc.edu/mailman/listinfo/llvmdev >-Chris -- http://llvm.cs.uiuc.edu/ http://www.nondot.org/~sabre/Projects/