Remove support for the -no-checking flag (#392)

* Remove support for the -no-checking flag

Fixes #381
Fixes #383
Work on #382

- No longer expose flag through API (`SLANG_COMPILE_FLAG_NO_CHECKING`) and command-line (`-no-checking`) options

- Remove all logic in `check.cpp` that was withholding diagnostics (including errors) when the no-checking mode was enabled

- Remove `HiddenImplicitCastExpr`, which was only created to support no-checking mode (it represented an implicit cast that our checking through was needed, but couldn't emit because it might be wrong)

- Remove logic for storing function bodies as raw token lists when checking is turned off. I'm leaving in the `UnparsedStmt` AST node in case we ever need/want to lazily parse and check function bodies down the line.

- Remove a few of the code-generation paths we had to contend with, but keep the comment about them in place.

- Remove GLSL-based tests that can't meaningfully work with the new approach.

- Fix other tests that used a GLSL baseline so that their GLSL compiles with `-pass-through glslang` instead of invoking `slang` with the `-no-checking` flag.

- Remove tests that were explicitly added to test the "rewriter + IR" path, since that is no longer supported.

There is more cleanup that can be done here, now that we know that AST-based rewrite and IR will never co-exist, but it is probably easier to deal with that as part of removing the AST-based rewrite path.

We've lost some test coverage here, but actually not too much if we consider that we are dropping GLSL input anyway.

* Fixup: test runner was mis-counting ignored tests

* Fixup: turn on dumping on test failure under Travis

* Fixup: enable extensions in Linux build of glslang

1 files changed, 0 insertions, 39 deletions

diff --git a/tests/reflection/thread-group-size.comp.expected b/tests/reflection/thread-group-size.comp.expected
deleted file mode 100644
index facd52cc0..000000000
--- a/tests/reflection/thread-group-size.comp.expected
+++ /dev/null
@@ -1,39 +0,0 @@
-result code = 0
-standard error = {
-}
-standard output = {
-{
-    "parameters": [
-        {
-            "name": "B",
-            "binding": {"kind": "descriptorTableSlot", "index": 0},
-            "type": {
-                "kind": "shaderStorageBuffer",
-                "elementType": {
-                    "kind": "struct",
-                    "fields": [
-                        {
-                            "name": "b",
-                            "type": {
-                                "kind": "array",
-                                "elementCount": 0,
-                                "elementType": {
-                                    "kind": "scalar",
-                                    "scalarType": "float32"
-                                }
-                            }
-                        }
-                    ]
-                }
-            }
-        }
-    ],
-    "entryPoints": [
-        {
-            "name": "main",
-            "stage:": "compute",
-            "threadGroupSize": [3, 5, 7]
-        }
-    ]
-}
-}