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List:       gcc-bugs
Subject:    =?UTF-8?B?W0J1ZyBpcGEvMTAxMjcwXSBOZXc6IGVycm9yOiBpbmxpbmluZyBm?= =?UTF-8?B?YWlsZWQgaW4gY2FsbCB0byDig
From:       "marxin at gcc dot gnu.org via Gcc-bugs" <gcc-bugs () gcc ! gnu ! org>
Date:       2021-06-30 13:53:21
Message-ID: bug-101270-4 () http ! gcc ! gnu ! org/bugzilla/
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101270

            Bug ID: 101270
           Summary: error: inlining failed in call to ‘always_inline'
                    ‘open.localalias': function not inlinable with -fPIC
                    -fno-semantic-interposition
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: hubicka at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

The following code snipped is rejected:

$ cat large_mounts.i
typedef struct {
} __fpos_t;
extern __inline __attribute__((__always_inline__))
__attribute__((__gnu_inline__)) __attribute__((__artificial__)) int
open(const char *__path, int __oflag, ...) { return 0; }
int open(const char *path, int flags, ...) {
  int mounts_fd;
  mounts_fd = open("/proc/mounts", 00);
  return mounts_fd;
}

$ gcc large_mounts.i -c -O2 -fPIC -fno-semantic-interposition 
large_mounts.i: In function ‘open':
large_mounts.i:6:5: error: inlining failed in call to ‘always_inline'
‘open.localalias': function not inlinable
    6 | int open(const char *path, int flags, ...) {
      |     ^~~~
large_mounts.i:8:15: note: called from here
    8 |   mounts_fd = open("/proc/mounts", 00);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~

while clang accepts it:
$ clang large_mounts.i -c -O2 -fPIC -fno-semantic-interposition

Moreover, we reject also with:

gcc large_mounts.i -c -O2 -fPIC
large_mounts.i: In function ‘open':
large_mounts.i:6:5: error: inlining failed in call to ‘always_inline'
‘open.localalias': redefined extern inline functions are not considered for
inlining
    6 | int open(const char *path, int flags, ...) {
      |     ^~~~
large_mounts.i:8:15: note: called from here
    8 |   mounts_fd = open("/proc/mounts", 00);
      |               ^~~~~~~~~~~~~~~~~~~~~~~~

this one is rejected since r8-2126-g325fe81618c822b8.=
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