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* [Bug target/63870] New: [Aarch64] [ARM] Errors in use of NEON instrinsics are reported incorrectly
@ 2014-11-14 13:52 cbaylis at gcc dot gnu.org
  2014-11-18 16:21 ` [Bug target/63870] [Aarch64] [ARM] Errors in use of NEON intrinsics " alan.lawrence at arm dot com
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: cbaylis at gcc dot gnu.org @ 2014-11-14 13:52 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63870

            Bug ID: 63870
           Summary: [Aarch64] [ARM] Errors in use of NEON instrinsics are
                    reported incorrectly
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: cbaylis at gcc dot gnu.org
          Reporter: cbaylis at gcc dot gnu.org
                CC: alan.lawrence at arm dot com
            Target: arm-unknown-linux-gnueabi, aarch64-linux-gnu

Created attachment 33972
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33972&action=edit
Example tests

Several NEON intrinsics have arguments which must be a constant integer in a
fixed range. At present, these constraints are enforced for most intrinsics
during assembly output, or, in some cases, not checked at all.

This can be fixed by using the %K format specifier to the error message. See 
https://gcc.gnu.org/ml/gcc-patches/2014-11/msg01248.html for a proposed patch
and explanation.

Once that patch is applied, it is necessary to rework the expansion of the
builtins so that the constraints are checked during expansion. Some of this
work has been started for Aarch64
(https://gcc.gnu.org/ml/gcc-patches/2014-11/msg00421.html)


Example demonstration of incorrect error messages using attached test cases on
an ARM target. Note that the error message is reported at the end of each
function, rather than the line where the error occurs.

$ arm-unknown-linux-gnueabihf-gcc -c neon_const_range_tests/* -mfpu=neon
neon_const_range_tests/vld1.c: In function ‘f_vld1_lane’:
neon_const_range_tests/vld1.c:10:1: error: lane out of range
 }
 ^
neon_const_range_tests/vld4.c: In function ‘f_vld4_lane’:
neon_const_range_tests/vld4.c:10:1: error: lane out of range
 }
 ^
neon_const_range_tests/vmul_lane.c: In function ‘f_vmul_lane’:
neon_const_range_tests/vmul_lane.c:10:1: error: lane out of range
 }
 ^
neon_const_range_tests/vshl.c: In function ‘f_vshl’:
neon_const_range_tests/vshl.c:10:1: error: constant out of range
 }
 ^
neon_const_range_tests/vshrn_n.c: In function ‘f_vshrn_n’:
neon_const_range_tests/vshrn_n.c:10:1: error: constant out of range
 }
 ^
neon_const_range_tests/vst1.c: In function ‘f_vst1_lane’:
neon_const_range_tests/vst1.c:9:1: error: lane out of range
 }
 ^
neon_const_range_tests/vst4.c: In function ‘f_vst4_lane’:
neon_const_range_tests/vst4.c:9:1: error: lane out of range
 }
 ^
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug go/63816] internal compiler error: in expand_expr_addr_expr_1 on gcc version 5.0.0 20141109 (experimental)
Date: Fri, 14 Nov 2014 13:56:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc816

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-11-14
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I'm seeing the same ICE on ppc64 with a modified libstdc++


^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2015-09-08 19:44 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-11-14 13:52 [Bug target/63870] New: [Aarch64] [ARM] Errors in use of NEON instrinsics are reported incorrectly cbaylis at gcc dot gnu.org
2014-11-18 16:21 ` [Bug target/63870] [Aarch64] [ARM] Errors in use of NEON intrinsics " alan.lawrence at arm dot com
2014-11-20 16:27 ` cbaylis at gcc dot gnu.org
2014-11-27 21:06 ` ramana at gcc dot gnu.org
2014-12-09 20:24 ` alalaw01 at gcc dot gnu.org
2014-12-10 11:21 ` alalaw01 at gcc dot gnu.org
2015-01-14 15:48 ` ktkachov at gcc dot gnu.org
2015-01-14 16:29 ` cbaylis at gcc dot gnu.org
2015-01-15 18:36 ` alalaw01 at gcc dot gnu.org
2015-09-08 19:44 ` alalaw01 at gcc dot gnu.org

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