[committed] d: Don't run all permutations for fail_compilation tests.

[Iain Buclaw via Gcc-patches]

Hi,

This patch turns off permutations for fail_compilatation tests if the
test file did not request its own options.

Fail compilation tests only check for language errors from the front-end, all
default option switches do nothing to alter the error.

Regression tested on x86_64-linux-gnu/-m32/-mx32, committed to mainline.

Regards
Iain

---
gcc/testsuite/ChangeLog:

        * lib/gdc-utils.exp (gdc-convert-test): Clear PERMUTE_ARGS for
        fail_compilation tests if not set by test file.
---
 gcc/testsuite/lib/gdc-utils.exp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gcc/testsuite/lib/gdc-utils.exp b/gcc/testsuite/lib/gdc-utils.exp
index 0e4f57c756d..37c1620f307 100644
--- a/gcc/testsuite/lib/gdc-utils.exp
+++ b/gcc/testsuite/lib/gdc-utils.exp
@@ -370,6 +370,11 @@ proc gdc-convert-test { base test } {
        }
 
        fail_compilation {
+           # Fail compilation tests only check for language errors from the
+           # front-end.  No need to run all permutations of the default DFLAGS.
+           if { $PERMUTE_ARGS == $DEFAULT_DFLAGS } {
+               set PERMUTE_ARGS ""
+           }
            puts $fdout "// { dg-final { output-exists-not } }"
        }
     }
-- 
2.25.1