[Bug tree-optimization/91885] New: ICE when compiling SPEC 2017 blender benchmark with -O3 -fprofile-generate

[sje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91885

            Bug ID: 91885
           Summary: ICE when compiling SPEC 2017 blender benchmark with
                    -O3 -fprofile-generate
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sje at gcc dot gnu.org
  Target Milestone: ---

When compiling the SPEC 2017 526.blender_r benchmark for peak, the compilation
that tries to generate profile information aborts with an ICE.  This happens to
me on an Aarch64 machine (ThunderX2) with -O3 -fprofile-generate.  Below is a
small testcase cutdown from blender that shows the ICE.


% /extra/sellcey/gcc-tot/install/bin/gcc -O3 -fprofile-generate x.i
during GIMPLE pass: vect
x.i: In function 'IMB_indexer_open':
x.i:18:20: internal compiler error: in execute_todo, at passes.c:2032
   18 | struct anim_index *IMB_indexer_open(const char *name) {
      |                    ^~~~~~~~~~~~~~~~
0xb87933 execute_todo
        ../../gcc/gcc/passes.c:2032
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

% cat x.i
typedef signed long int __int64_t;
typedef unsigned long int __uint64_t;
typedef __int64_t int64_t;
typedef __uint64_t uint64_t;
inline void BLI_endian_switch_int64(int64_t *val) {
  uint64_t tval = *val;
  *val = ((tval >> 56)) | ((tval << 40) & 0x00ff000000000000ll) | ((tval << 24)
& 0x0000ff0000000000ll) | ((tval << 8) & 0x000000ff00000000ll) | ((tval >> 8) &
0x00000000ff000000ll) | ((tval >> 24) & 0x0000000000ff0000ll) | ((tval >> 40) &
0x000000000000ff00ll) | ((tval << 56));
}
typedef struct anim_index_entry {
  unsigned long long seek_pos_dts;
  unsigned long long pts;
} anim_index_entry;
extern struct anim_index_entry *MEM_callocN(int);
struct anim_index {
  int num_entries;
  struct anim_index_entry *entries;
};
struct anim_index *IMB_indexer_open(const char *name) {
  char header[13];
  struct anim_index *idx;
  int i;
  idx->entries = MEM_callocN(8);
  if (((1 == 0) != (header[8] == 'V'))) {
   for (i = 0; i < idx->num_entries; i++) {
    BLI_endian_switch_int64((int64_t *)&idx->entries[i].seek_pos_dts);
    BLI_endian_switch_int64((int64_t *)&idx->entries[i].pts);
   }
  }
}