This patch adds a further number of tests, but were added as part of
fixing gdc-specific bugs.

---
 gcc/testsuite/gdc.dg/asan/asan.exp            |   32 +
 gcc/testsuite/gdc.dg/asan/gdc272.d            |   16 +
 gcc/testsuite/gdc.dg/compilable.d             |  463 +++++
 gcc/testsuite/gdc.dg/dg.exp                   |   50 +
 gcc/testsuite/gdc.dg/gdc254.d                 |   14 +
 gcc/testsuite/gdc.dg/gdc260.d                 |    8 +
 gcc/testsuite/gdc.dg/gdc270a.d                |   12 +
 gcc/testsuite/gdc.dg/gdc270b.d                |    8 +
 gcc/testsuite/gdc.dg/gdc282.d                 |   47 +
 gcc/testsuite/gdc.dg/gdc283.d                 |  101 +
 gcc/testsuite/gdc.dg/imports/gdc170.d         |   18 +
 gcc/testsuite/gdc.dg/imports/gdc231.d         |   24 +
 gcc/testsuite/gdc.dg/imports/gdc239.d         |    9 +
 gcc/testsuite/gdc.dg/imports/gdc241a.d        |    6 +
 gcc/testsuite/gdc.dg/imports/gdc241b.d        |    8 +
 gcc/testsuite/gdc.dg/imports/gdc251a.d        |    6 +
 gcc/testsuite/gdc.dg/imports/gdc251b.d        |    3 +
 gcc/testsuite/gdc.dg/imports/gdc253.d         |   23 +
 gcc/testsuite/gdc.dg/imports/gdc254a.d        |   10 +
 gcc/testsuite/gdc.dg/imports/gdc256.d         |    1 +
 gcc/testsuite/gdc.dg/imports/gdc27.d          |   14 +
 .../gdc.dg/imports/gdcpkg256/package.d        |    3 +
 gcc/testsuite/gdc.dg/imports/runnable.d       |   25 +
 gcc/testsuite/gdc.dg/link.d                   |   38 +
 gcc/testsuite/gdc.dg/lto/lto.exp              |   56 +
 gcc/testsuite/gdc.dg/lto/ltotests_0.d         |   93 +
 gcc/testsuite/gdc.dg/lto/ltotests_1.d         |    9 +
 gcc/testsuite/gdc.dg/runnable.d               | 1625 +++++++++++++++
 gcc/testsuite/gdc.dg/simd.d                   | 1735 +++++++++++++++++
 29 files changed, 4457 insertions(+)

---