From 8de0a2ebc58c510d62df1a3d211643bfb463d9c4 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Wed, 10 Jun 2020 14:57:30 -0700
Subject: Add compiler flag to disable specialization pass.

---
 source/slang/slang-compiler.h  | 4 ++++
 source/slang/slang-emit.cpp    | 3 ++-
 source/slang/slang-options.cpp | 4 ++++
 3 files changed, 10 insertions(+), 1 deletion(-)

(limited to 'source')

diff --git a/source/slang/slang-compiler.h b/source/slang/slang-compiler.h
index f8843fadc..26648ed48 100644
--- a/source/slang/slang-compiler.h
+++ b/source/slang/slang-compiler.h
@@ -1759,6 +1759,10 @@ namespace Slang
             /// Should SPIR-V be generated directly from Slang IR rather than via translation to GLSL?
         bool shouldEmitSPIRVDirectly = false;
 
+
+        // If true will allow generating dynamic dispatch code for generics.
+        bool allowDynamicCode = false;
+
         String m_dumpIntermediatePrefix;
 
     private:
diff --git a/source/slang/slang-emit.cpp b/source/slang/slang-emit.cpp
index 12996e783..3e0d6ae26 100644
--- a/source/slang/slang-emit.cpp
+++ b/source/slang/slang-emit.cpp
@@ -270,7 +270,8 @@ Result linkAndOptimizeIR(
     // perform specialization of functions based on parameter
     // values that need to be compile-time constants.
     //
-    specializeModule(irModule);
+    if (!compileRequest->allowDynamicCode)
+        specializeModule(irModule);
 
     // Debugging code for IR transformations...
 #if 0
diff --git a/source/slang/slang-options.cpp b/source/slang/slang-options.cpp
index 89fe03255..5bf0c6c9d 100644
--- a/source/slang/slang-options.cpp
+++ b/source/slang/slang-options.cpp
@@ -557,6 +557,10 @@ struct OptionsParser
                 {
                     requestImpl->getFrontEndReq()->useSerialIRBottleneck = true;
                 }
+                else if (argStr == "-allow-dynamic-code")
+                {
+                    requestImpl->getBackEndReq()->allowDynamicCode = true;
+                }
                 else if (argStr == "-verbose-paths")
                 {
                     requestImpl->getSink()->setFlag(DiagnosticSink::Flag::VerbosePath);
-- 
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