From 12e891ed9ac934adbcc4160da6a05938cc38b529 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Thu, 17 Oct 2024 22:22:34 -0700
Subject: Cleanup definition of `printf`. (#5330)

* Cleanup definition of `printf`.

* Fix.

* Fix spirv generation.

* Fix.

* enhance test.
---
 source/slang/slang-emit-c-like.cpp | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'source/slang/slang-emit-c-like.cpp')

diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index 79a9b1a56..dd5cb88d3 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -2847,6 +2847,26 @@ void CLikeSourceEmitter::defaultEmitInstExpr(IRInst* inst, const EmitOpInfo& inO
         }
         break;
     }
+    case kIROp_Printf:
+    {
+        m_writer->emit("printf(");
+        emitOperand(inst->getOperand(0), getInfo(EmitOp::General));
+        if (inst->getOperandCount() == 2)
+        {
+            auto operand = inst->getOperand(1);
+            if (auto makeStruct = as<IRMakeStruct>(operand))
+            {
+                // Flatten the tuple resulting from the variadic pack.
+                for (UInt bb = 0; bb < makeStruct->getOperandCount(); ++bb)
+                {
+                    m_writer->emit(", ");
+                    emitOperand(makeStruct->getOperand(bb), getInfo(EmitOp::General));
+                }
+            }
+        }
+        m_writer->emit(")");
+        break;
+    }
     case kIROp_RequireGLSLExtension:
     {
         break; //should already have set requirement; case covered for empty intrinsic block
-- 
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