[PATCH][libstdc++][testsuite][reverted] Remove check for truncation overflow

[Kyrill Tkachov <kyrylo dot tkachov at arm dot com>]

Hi all,

This patch reverts the libstdc++ hunk of 
https://gcc.gnu.org/ml/gcc-patches/2014-12/msg00768.html, that is the check
for relocation truncation and the marking of the test as UNSUPPORTED if 
it occurs.
The problem with this approach is that when we call 'unsupported 
"message"' in the .exp file the test is marked as
UNSUPPORTED, but since we return the empty string, the test harness adds 
a PASS (test for excess errors) and marks it as
UNRESOLVED. So instead of having a FAIL+UNRESOLVED for each test we get 
an UNSUPPORTED+PASS+UNRESOLVED.
While it's nice to not have the FAILs, the latter combination confuses 
various results compare scripts and is not very helpful.

I couldn't figure out a way to remove the PASS+UNRESOLVED part from the 
libstdc++ testsuite and leave just the UNSUPPORTED message,
so I'm reverting that check until I figure out how to do it properly.
AFAIK this doesn't affect anything beyond aarch64 tests with -mcmodel=tiny

Committed with r220206.

Thanks,
Kyrill

2015-01-28  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

    * testsuite/lib/libstdc++.exp (v3_target_compile): Remove
    check for unsupported.
    (v3_target_compile_as_c): Likewise.

diff --git a/libstdc++-v3/testsuite/lib/libstdc++.exp b/libstdc++-v3/testsuite/lib/libstdc++.exp
index 05ca7d9..b2f7d00 100644
--- a/libstdc++-v3/testsuite/lib/libstdc++.exp
+++ b/libstdc++-v3/testsuite/lib/libstdc++.exp
@@ -486,12 +486,7 @@ proc v3_target_compile { source dest type options } {
     lappend options "timeout=[timeout_value]"
 
     set comp_output [target_compile $source $dest $type $options]
-    set unsupported_message [${tool}_check_unsupported_p $comp_output]
 
-    if { $unsupported_message != "" } {
-      unsupported "$dest: $unsupported_message"
-      return ""
-    }
     return $comp_output
 }
 
@@ -562,12 +557,7 @@ proc v3_target_compile_as_c { source dest type options } {
     lappend options "timeout=[timeout_value]"
 
     set comp_output [target_compile $source $dest $type $options]
-    set unsupported_message [${tool}_check_unsupported_p $comp_output]
 
-    if { $unsupported_message != "" } {
-      unsupported "$dest: $unsupported_message"
-      return ""
-    }
     return $comp_output
 }