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From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/100067] Unexpected warning for -mcpu=neoverse-n1 when
 configured with --with-fpu
Date: Thu, 15 Apr 2021 13:29:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100067

Christophe Lyon <clyon at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clyon at gcc dot gnu.org

--- Comment #3 from Christophe Lyon <clyon at gcc dot gnu.org> ---
Unfortunately this is causing many regressions in the GCC testsuite.

For instance:
--target arm-none-linux-gnueabi
--with-mode arm
--with-cpu cortex-a9
--with-fpu default
gcc.target/arm/armv8_2-fp16-neon-1.c is compiled with
-mfloat-abi=3Dsoftfp -march=3Darmv8.2-a+fp16

/gcc/testsuite/gcc.target/arm/armv8_2-fp16-neon-1.c: In function
'test_vceqz_16x4':
/gcc/testsuite/gcc.target/arm/armv8_2-fp16-neon-1.c:139:13: warning: implic=
it
declaration of function 'vceqz_f16'; did you mean 'vceqq_u16'?
[-Wimplicit-function-declaration]
/gcc/testsuite/gcc.target/arm/armv8_2-fp16-neon-1.c:10:25: note: in definit=
ion
of macro 'MSTRCAT'
/gcc/testsuite/gcc.target/arm/armv8_2-fp16-neon-1.c:139:1: note: in expansi=
on
of macro 'VCMP1_TEST'
/gcc/testsuite/gcc.target/arm/armv8_2-fp16-neon-1.c:139:13: error: incompat=
ible
types when returning type 'int' but 'uint16x4_t' was expected
[...]


--target arm-none-linux-gnueabi
--with-mode arm
--with-cpu cortex-a9
--with-fpu default
Dejagnu flags: -march=3Darmv5t
gcc.target/arm/aes-fuse-1.c is compiled with

-march=3Darmv5t -mfpu=3Dcrypto-neon-fp-armv8 -mfloat-abi=3Dsoftfp -mcpu=3Dc=
ortex-a72
cc1: warning: switch '-mcpu=3Dcortex-a72' conflicts with switch '-march=3Da=
rmv5t'
FAIL: gcc.target/arm/aes-fuse-1.c (test for excess errors)

For a full picture of the regressions I noticed:
https://people.linaro.org/~christophe.lyon/cross-validation/gcc/trunk/r11-8=
168-gd1e4368ddb76a92c44f824c8e4ca1a3de8149342/report-build-info.html

(click on "log" to download the corresponding gcc.log and see the error
messages)
(you can ignore the regressions in g++, they are caused by a previous commi=
t)=