[patch] Guard aarch64/aapcs64 tests using abitest.S by check_weak_available

[Olivier Hainque]

Hello,

Some tests from  gcc/testsuite/gcc.target/aarch64/aapcs64
resort to the abitest.S source, which defines a few weak symbols:
  ...
  .weak   testfunc
  .weak   testfunc_ptr
  .weak   saved_return_address

The attached patch is a proposal to prevent the execution of
those tests in configurations where weak symbols are advertised
as not supported.

This cures a significant number of failures on VxWorks and bootstrap
+ regress tests fine on aarch64-linux.

Is this ok to commit ?

Thanks in advance!

With Kind Regards,

Olivier

2019-12-16  Joel Brobecker  <brobec...@adacore.com>
            Olivier Hainque  <hain...@adacore.com>

        testsuite/

        * gcc.target/aarch64/aapcs64/aapcs64.exp: Guard tests using
        abitest.S by check_weak_available.


 .../gcc.target/aarch64/aapcs64/aapcs64.exp    | 36 ++++++++++++-------
 1 file changed, 23 insertions(+), 13 deletions(-)

diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp 
b/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp
index c17af6c3084..36687800ecd 100644
--- a/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp
@@ -29,12 +29,16 @@ torture-init
 set-torture-options $C_TORTURE_OPTIONS
 set additional_flags "-W -Wall -Wno-abi"
 
-# Test parameter passing.
-foreach src [lsort [glob -nocomplain $srcdir/$subdir/test_*.c]] {
-    if {[runtest_file_p $runtests $src]} {
+# Test parameter passing.  This uses abitest.S which relies on weak
+# symbols.
+
+if { [check_weak_available] } {
+    foreach src [lsort [glob -nocomplain $srcdir/$subdir/test_*.c]] {
+       if {[runtest_file_p $runtests $src]} {
            c-torture-execute [list $src \
                                    $srcdir/$subdir/abitest.S] \
                                    $additional_flags
+       }
     }
 }
 
@@ -48,25 +52,31 @@ foreach src [lsort [glob -nocomplain 
$srcdir/$subdir/rec_*.c]] {
     }
 }
 
-# Test unnamed argument retrieval via the va_arg macro.
-foreach src [lsort [glob -nocomplain $srcdir/$subdir/va_arg-*.c]] {
-    if {[runtest_file_p $runtests $src]} {
+# Test unnamed argument retrieval via the va_arg macro.  This uses abitest.S
+# which relies on weak symbols.
+if { [check_weak_available] } {
+    foreach src [lsort [glob -nocomplain $srcdir/$subdir/va_arg-*.c]] {
+       if {[runtest_file_p $runtests $src]} {
            c-torture-execute [list $src \
                                    $srcdir/$subdir/abitest.S] \
                                    $additional_flags
+       }
     }
 }
 
-# Test function return value.
-#   Disable -fipa-ra to prevent the compiler from generating
-#   conflicting code.
-set additional_flags_for_func_ret $additional_flags
-append additional_flags_for_func_ret " -fno-ipa-ra"
-foreach src [lsort [glob -nocomplain $srcdir/$subdir/func-ret-*.c]] {
-    if {[runtest_file_p $runtests $src]} {
+# Test function return value.  This uses abitest.S which relies on
+# weak symbols.
+if { [check_weak_available] } {
+    #   Disable -fipa-ra to prevent the compiler from generating
+    #   conflicting code.
+    set additional_flags_for_func_ret $additional_flags
+    append additional_flags_for_func_ret " -fno-ipa-ra"
+    foreach src [lsort [glob -nocomplain $srcdir/$subdir/func-ret-*.c]] {
+       if {[runtest_file_p $runtests $src]} {
            c-torture-execute [list $src \
                                    $srcdir/$subdir/abitest.S] \
                                    $additional_flags_for_func_ret
+       }
     }
 }
 
-- 
2.17.1