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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110268] New: arm MVE intrinsics support broken with LTO
Date: Thu, 15 Jun 2023 15:59:28 +0000
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X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110268

            Bug ID: 110268
           Summary: arm MVE intrinsics support broken with LTO
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---

Since I rewrote (a lot of) MVE intrinsics, use of LTO is broken:

$ cat ~/t.c
#include <arm_mve.h>
int main(void)
{
  return vaddvq(vdupq_n_s8 (1));
}

# no LTO, OK:
$ arm-none-eabi-gcc ~/t.c -march=3Darmv8.1-m.main+mve -mfloat-abi=3Dhard
-specs=3Drdimon.specs

# with LTO, broken:
$ arm-none-eabi-gcc ~/t.c -march=3Darmv8.1-m.main+mve -mfloat-abi=3Dhard
-specs=3Drdimon.specs -flto
lto1: fatal error: target specific builtin not available
compilation terminated.
lto-wrapper: fatal error: arm-none-eabi-gcc returned 1 exit status
compilation terminated.
/arm-none-eabi/bin/../lib/gcc/arm-none-eabi/14.0.0/../../../../arm-none-eab=
i/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status=