Unroll target improvements (#1291)

* Add unroll support for CUDA, and preliminary for C++.
Document [unroll] support.

* Fix loop-unroll to run on CPU, and test on CPU and elsewhere.
Fix bug in emitting loop unroll condition.

* Improved comment.

* Added support for vk/glsl loop unrolling.

1 files changed, 2 insertions, 14 deletions

diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index 3631040b8..b217a2a1b 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -2592,20 +2592,8 @@ void CLikeSourceEmitter::emitRegion(Region* inRegion)
                 //
                 if (auto loopControlDecoration = loopInst->findDecoration<IRLoopControlDecoration>())
                 {
-                    switch (loopControlDecoration->getMode())
-                    {
-                    case kIRLoopControl_Unroll:
-                        // Note: loop unrolling control is only available in HLSL, not GLSL
-                        if(getSourceStyle() == SourceStyle::HLSL)
-                        {
-                            m_writer->emit("[unroll]\n");
-                        }
-                        break;
-
-                    default:
-                        break;
-                    }
-                }
+                    emitLoopControlDecorationImpl(loopControlDecoration);
+               }
 
                 m_writer->emit("for(;;)\n{\n");
                 m_writer->indent();