Hi, I checked in this patch to add a testase for PR middle-end/47383.
H.J. --- Index: gcc.dg/torture/pr47383.c =================================================================== --- gcc.dg/torture/pr47383.c (revision 0) +++ gcc.dg/torture/pr47383.c (revision 0) @@ -0,0 +1,30 @@ +/* { dg-do run } */ + +static int heap[2*(256 +1+29)+1]; +static int heap_len; +static int heap_max; +void +__attribute__ ((noinline)) +foo (int elems) +{ + int n, m; + int max_code = -1; + int node = elems; + heap_len = 0, heap_max = (2*(256 +1+29)+1); + for (n = 0; n < elems; n++) + heap[++heap_len] = max_code = n; + do { + n = heap[1]; + heap[1] = heap[heap_len--]; + m = heap[1]; + heap[--heap_max] = n; + heap[--heap_max] = m; + } while (heap_len >= 2); +} + +int +main () +{ + foo (286); + return 0; +} Index: ChangeLog =================================================================== --- ChangeLog (revision 177275) +++ ChangeLog (working copy) @@ -1,3 +1,8 @@ +2011-08-03 H.J. Lu <hongjiu...@intel.com> + + PR middle-end/47383 + * gcc.dg/torture/pr47383.c: Likewise. + 2011-08-03 Arnaud Charlet <char...@adacore.com> * gnat.dg/specs/debug1.ads: Add missing -margs switch.