GPU Foreach Loop (#1498)

* GPU Foreach Loop

This PR introduces the completed GPU foreach loop and updates the
heterogeneous-hello-world example to use it.  This PR builds on the
previous introduction of the GPU Foreach loop parsing and semantic
checking PR (#1482) by introducing IR lowering and emmitting.  THe new
feature can be used by having a GPU_Foreach loop interacting with a
named non-CPP entry point, and using the -heterogeneous flag.

* Fix to path

Co-authored-by: Tim Foley <tfoleyNV@users.noreply.github.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index 0708bc9a8..9e9117dcd 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -2425,6 +2425,31 @@ void CLikeSourceEmitter::defaultEmitInstExpr(IRInst* inst, const EmitOpInfo& inO
         m_writer->emit(")");
         break;
     }
+    case kIROp_GpuForeach:
+    {
+        auto operand = inst->getOperand(2);
+        if (as<IRFunc>(operand))
+        {
+            //emitOperand(operand->findDecoration<IREntryPointDecoration>(), getInfo(EmitOp::General));
+            emitOperand(operand, getInfo(EmitOp::General));
+        }
+        else
+        {
+            SLANG_UNEXPECTED("Expected 3rd operand to be a function");
+        }
+        m_writer->emit("_wrapper(");
+        emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+        m_writer->emit(", ");
+        emitOperand(inst->getOperand(1), getInfo(EmitOp::General));
+        UInt argCount = inst->getOperandCount();
+        for (UInt aa = 3; aa < argCount; ++aa)
+        {
+            m_writer->emit(", ");
+            emitOperand(inst->getOperand(aa), getInfo(EmitOp::General));
+        }
+        m_writer->emit(")");
+        break;
+    }
     default:
         diagnoseUnhandledInst(inst);
         break;