Add support for dumping intermediates for debugging.

Calling:

    spSetDumpIntermedites(compileRequest, true);

will set up a mode where Slang tries to dump every intermediate HLSL, GLSL, DXBC, SPIR-V, etc. file it generates. If SPIR-V or DXBC is requested then we also dump assembly of those.

Right now the files are all named as `slang-<counter>.<ext>`, and get dropped in whatever the working directory is, but I'm open to ideas on how to improve that.

Note: this change introduces a new binary interface to `glslang`, so pulling it requires an updated `glslang.dll`.

1 files changed, 14 insertions, 0 deletions

diff --git a/source/slang/compiler.h b/source/slang/compiler.h
index 2b440ad85..a7d104b5f 100644
--- a/source/slang/compiler.h
+++ b/source/slang/compiler.h
@@ -207,6 +207,9 @@ namespace Slang
         // Compile flags to be shared by all translation units
         SlangCompileFlags compileFlags = 0;
 
+        // Should we dump intermediate results along the way, for debugging?
+        bool shouldDumpIntermediates = false;
+
         // Output stuff
         DiagnosticSink mSink;
         String mDiagnosticOutput;
@@ -277,6 +280,17 @@ namespace Slang
 
     void generateOutput(
         CompileRequest* compileRequest);
+
+    // Helper to dump intermediate output when debugging
+    void maybeDumpIntermediate(
+        CompileRequest* compileRequest,
+        void const*     data,
+        size_t          size,
+        CodeGenTarget   target);
+    void maybeDumpIntermediate(
+        CompileRequest* compileRequest,
+        char const*     text,
+        CodeGenTarget   target);
 }
 
 #endif
\ No newline at end of file