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, 1 insertions, 3 deletions

diff --git a/source/slang/options.cpp b/source/slang/options.cpp
index a5ed8eca6..68d16f107 100644
--- a/source/slang/options.cpp
+++ b/source/slang/options.cpp
@@ -264,9 +264,7 @@ struct OptionsParser
 //                else if (argStr == "-symbo")
 //                    options.SymbolToCompile = tryReadCommandLineArgument(arg, &argCursor, argEnd);
                 //else
-                if (argStr == "-no-checking")
-                    flags |= SLANG_COMPILE_FLAG_NO_CHECKING;
-                else if(argStr == "-split-mixed-types" )
+                if(argStr == "-split-mixed-types" )
                 {
                     flags |= SLANG_COMPILE_FLAG_SPLIT_MIXED_TYPES;
                 }