From 136dcf88a71304a3c90890e534139ec1ef8c8b17 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Fri, 31 Aug 2018 03:55:43 -0300
Subject: [PATCH] Add OpLoopMerge

---
 include/sirit/sirit.h |  4 ++++
 src/insts/flow.cpp    | 10 ++++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/sirit/sirit.h b/include/sirit/sirit.h
index 1e6da4d..00f64e3 100644
--- a/include/sirit/sirit.h
+++ b/include/sirit/sirit.h
@@ -154,6 +154,10 @@ public:
 
     // Flow
 
+    /// Declare a structured loop.
+    Ref LoopMerge(Ref merge_block, Ref continue_target, spv::LoopControlMask loop_control,
+                  const std::vector<Ref>& literals = {});
+
     /// The block label instruction: Any reference to a block is through this ref.
     Ref Label();
 
diff --git a/src/insts/flow.cpp b/src/insts/flow.cpp
index e1f0b4b..d97b324 100644
--- a/src/insts/flow.cpp
+++ b/src/insts/flow.cpp
@@ -9,6 +9,16 @@
 
 namespace Sirit {
 
+Ref Module::LoopMerge(Ref merge_block, Ref continue_target, spv::LoopControlMask loop_control,
+                      const std::vector<Ref>& literals) {
+    Op* op{new Op(spv::Op::OpLoopMerge)};
+    op->Add(merge_block);
+    op->Add(continue_target);
+    AddEnum(op, loop_control);
+    op->Add(literals);
+    return AddCode(op);
+}
+
 Ref Module::Label() {
     return AddCode(spv::Op::OpLabel, bound++);
 }