[Bug testsuite/65578] New: FAIL: gcc.target/arm/builtin-bswap-1.c (test for excess errors)

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65578

            Bug ID: 65578
           Summary: FAIL: gcc.target/arm/builtin-bswap-1.c (test for
                    excess errors)
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vries at gcc dot gnu.org

gcc.target/arm/builtin-bswap-1.c compilation fails like this:
...
spawn /data/devel/lean-c/build/gcc/xgcc -B/data/devel/lean-c/build/gcc/
src/gcc/testsuite/gcc.target/arm/builtin-bswap-1.c -fno-diagnostics-show-caret
-fdiagnostics-color=never -O2 -march=armv6 -ffat-lto-objects -ffat-lto-objects
-ffat-lto-objects -ffat-lto-objects -ffat-lto-objects -ffat-lto-objects
-ffat-lto-objects -ffat-lto-objects -ffat-lto-objects -ffat-lto-objects -S -o
builtin-bswap-1.s^M
src/gcc/testsuite/gcc.target/arm/builtin-bswap-1.c: In function 'swaps16':^M
src/gcc/testsuite/gcc.target/arm/builtin-bswap-1.c:18:1: sorry, unimplemented:
Thumb-1 hard-float VFP ABI^M
compiler exited with status 1
output is:
src/gcc/testsuite/gcc.target/arm/builtin-bswap-1.c: In function 'swaps16':^M
src/gcc/testsuite/gcc.target/arm/builtin-bswap-1.c:18:1: sorry, unimplemented:
Thumb-1 hard-float VFP ABI^M

FAIL: gcc.target/arm/builtin-bswap-1.c (test for excess errors)
Excess errors:
src/gcc/testsuite/gcc.target/arm/builtin-bswap-1.c:18:1: sorry, unimplemented:
Thumb-1 hard-float VFP ABI
...

The testcase requires v6. So it first tests whether it can set the arm to v6,
and then sets it:
...
/* { dg-require-effective-target arm_arch_v6_ok } */
/* { dg-add-options arm_arch_v6 } */
...

The effective target test succeeds, but during compilation, we find out that we
actually can't compile, AFAIU because of the combination -mthumb -march=armv6
-mhard-float.