[LLVMbugs] [Bug 7490] [miscompile] Incomplete default initialization of arrays

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Jun 25 11:32:01 PDT 2010


Fariborz Jahanian <fjahanian at apple.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #2 from Fariborz Jahanian <fjahanian at apple.com> 2010-06-25 13:32:01 CDT ---
(In reply to comment #1)
> Ouch, this sounds like a really nasty miscompilation.  Fariborz, can you take a
> look as soon as reasonably possible?

Fixed in TOT: http://llvm.org/viewvc/llvm-project?view=rev&revision=106869

Following test case was added to llvm test suite:

#include <assert.h>

void func() {
  int *buckets = new int[111]();
  for (int i = 0; i < 111; i++)
    assert(buckets[i] == 0);
  for (int i = 0; i < 111; i++)
    buckets[i] = i;

  delete [] buckets;

int main(int argc, char **argv) {
    return 0;

Let me know if poisoning malloc() now works for you.

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