Lower varying parameters as pointers instead of SSA values. (#5919)

* Add executable test on matrix-typed vertex input.
* Fix emit logic of matrix layout qualifier.
* Pass fragment shader varying input by constref to allow EvaluateAttributeAtCentroid etc. to be implemented correctly.

1 files changed, 11 insertions, 0 deletions

diff --git a/source/slang/slang-emit.cpp b/source/slang/slang-emit.cpp
index 7ea2fef88..b9217de41 100644
--- a/source/slang/slang-emit.cpp
+++ b/source/slang/slang-emit.cpp
@@ -42,6 +42,7 @@
 #include "slang-ir-entry-point-uniforms.h"
 #include "slang-ir-explicit-global-context.h"
 #include "slang-ir-explicit-global-init.h"
+#include "slang-ir-fix-entrypoint-callsite.h"
 #include "slang-ir-fuse-satcoop.h"
 #include "slang-ir-glsl-legalize.h"
 #include "slang-ir-glsl-liveness.h"
@@ -76,6 +77,7 @@
 #include "slang-ir-pytorch-cpp-binding.h"
 #include "slang-ir-redundancy-removal.h"
 #include "slang-ir-resolve-texture-format.h"
+#include "slang-ir-resolve-varying-input-ref.h"
 #include "slang-ir-restructure-scoping.h"
 #include "slang-ir-restructure.h"
 #include "slang-ir-sccp.h"
@@ -314,6 +316,7 @@ struct RequiredLoweringPassSet
     bool glslSSBO;
     bool byteAddressBuffer;
     bool dynamicResource;
+    bool resolveVaryingInputRef;
 };
 
 // Scan the IR module and determine which lowering/legalization passes are needed based
@@ -423,6 +426,9 @@ void calcRequiredLoweringPassSet(
     case kIROp_DynamicResourceType:
         result.dynamicResource = true;
         break;
+    case kIROp_ResolveVaryingInputRef:
+        result.resolveVaryingInputRef = true;
+        break;
     }
     if (!result.generics || !result.existentialTypeLayout)
     {
@@ -591,6 +597,11 @@ Result linkAndOptimizeIR(
     if (requiredLoweringPassSet.glslGlobalVar)
         translateGLSLGlobalVar(codeGenContext, irModule);
 
+    if (requiredLoweringPassSet.resolveVaryingInputRef)
+        resolveVaryingInputRef(irModule);
+
+    fixEntryPointCallsites(irModule);
+
     // Replace any global constants with their values.
     //
     replaceGlobalConstants(irModule);