[Bug target/48385] x86-64: Tail call recursion optimization with -mcmodel=large can generate invalid assembly (immediate operand illegal with absolute jump)

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48385

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-30 23:11:09 UTC ---
[hjl@gnu-33 delta]$ cat testcase.c   
typedef unsigned char uint8_t;
 typedef unsigned long int uint64_t;
 typedef uint64_t size_t;
 typedef uint64_t uintptr_t;
 typedef uint8_t bool;
 typedef struct {
  unsigned int unused:
1;
  unsigned int addr_12_31 : 30;
  unsigned int addr_32_51 : 21;
 } __attribute__ ((packed)) pte_t;
 typedef struct {
  pte_t *page_table;
 } as_genarch_t;
 typedef struct as {
  as_genarch_t genarch;
 } as_t;
 void pt_mapping_remove(as_t *as, uintptr_t page) {
  pte_t *ptl0 = (pte_t *) (((uintptr_t) ((uintptr_t) as->genarch.page_table)) +
0xffff800000000000UL);
  pte_t *ptl1 = (pte_t *) (((uintptr_t) (((pte_t *) ((((uint64_t) ((pte_t *)
(ptl0))[((((page) >> 39) & 0x1ffU))].addr_12_31) << 12) | (((uint64_t) ((pte_t
*) (ptl0))[((((page) >> 39) & 0x1ffU))].addr_32_51) << 32))))) +
0xffff800000000000UL);
  pte_t *ptl2 = (pte_t *) (((uintptr_t) (((pte_t *) ((((uint64_t) ((pte_t *)
(ptl1))[((((page) >> 30) & 0x1ffU))].addr_12_31) << 12) | (((uint64_t) ((pte_t
*) (ptl1))[((((page) >> 30) & 0x1ffU))].addr_32_51) << 32))))) +
0xffff800000000000UL);
  pte_t *ptl3 = (pte_t *) (((uintptr_t) (((pte_t *) ((((uint64_t) ((pte_t *)
(ptl2))[((((page) >> 21) & 0x1ffU))].addr_12_31) << 12) | (((uint64_t) ((pte_t
*) (ptl2))[((((page) >> 21) & 0x1ffU))].addr_32_51) << 32))))) +
0xffff800000000000UL);
  memsetb(&ptl3[(((page) >> 12) & 0x1ffU)], sizeof(pte_t), 0);
  bool empty = 1;
  unsigned int i;
  for (i = 0;
 i < 512;
 i++) {
   if ((*((uint64_t *) ((&ptl3[i]))) != 0)) {
    empty = 0;
   }
  }
  for (i = 0;
 i < 512;
 i++) {
   if ((*((uint64_t *) ((&ptl2[i]))) != 0)) {
    empty = 0;
   }
  }
  if (empty) {
   frame_free((((uintptr_t) ((uintptr_t) ptl1)) - 0xffff800000000000UL));
   memsetb(&ptl0[(((page) >> 39) & 0x1ffU)], sizeof(pte_t), 0);
  }
 }
[hjl@gnu-33 delta]$