From 079e0e058eec46c9d1e9b1e978416be88cdff5ec Mon Sep 17 00:00:00 2001
From: DrChat <arkolbed@gmail.com>
Date: Sat, 23 Dec 2017 17:28:20 -0600
Subject: [PATCH] Glslang swizzle vectors should be const

---
 third_party/glslang-spirv/SpvBuilder.cpp | 4 ++--
 third_party/glslang-spirv/SpvBuilder.h   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/third_party/glslang-spirv/SpvBuilder.cpp b/third_party/glslang-spirv/SpvBuilder.cpp
index 36bededc5..ba8ab9e95 100644
--- a/third_party/glslang-spirv/SpvBuilder.cpp
+++ b/third_party/glslang-spirv/SpvBuilder.cpp
@@ -1222,7 +1222,7 @@ Id Builder::createFunctionCall(spv::Function* function, const std::vector<spv::I
 }
 
 // Comments in header
-Id Builder::createRvalueSwizzle(Decoration precision, Id typeId, Id source, std::vector<unsigned>& channels)
+Id Builder::createRvalueSwizzle(Decoration precision, Id typeId, Id source, const std::vector<unsigned>& channels)
 {
     if (channels.size() == 1)
         return setPrecision(createCompositeExtract(source, typeId, channels.front()), precision);
@@ -1239,7 +1239,7 @@ Id Builder::createRvalueSwizzle(Decoration precision, Id typeId, Id source, std:
 }
 
 // Comments in header
-Id Builder::createLvalueSwizzle(Id typeId, Id target, Id source, std::vector<unsigned>& channels)
+Id Builder::createLvalueSwizzle(Id typeId, Id target, Id source, const std::vector<unsigned>& channels)
 {
     assert(getNumComponents(source) == (int)channels.size());
     if (channels.size() == 1 && getNumComponents(source) == 1)
diff --git a/third_party/glslang-spirv/SpvBuilder.h b/third_party/glslang-spirv/SpvBuilder.h
index 28f846578..c3c316de0 100644
--- a/third_party/glslang-spirv/SpvBuilder.h
+++ b/third_party/glslang-spirv/SpvBuilder.h
@@ -267,13 +267,13 @@ public:
 
     // Take an rvalue (source) and a set of channels to extract from it to
     // make a new rvalue, which is returned.
-    Id createRvalueSwizzle(Decoration precision, Id typeId, Id source, std::vector<unsigned>& channels);
+    Id createRvalueSwizzle(Decoration precision, Id typeId, Id source, const std::vector<unsigned>& channels);
 
     // Take a copy of an lvalue (target) and a source of components, and set the
     // source components into the lvalue where the 'channels' say to put them.
     // An updated version of the target is returned.
     // (No true lvalue or stores are used.)
-    Id createLvalueSwizzle(Id typeId, Id target, Id source, std::vector<unsigned>& channels);
+    Id createLvalueSwizzle(Id typeId, Id target, Id source, const std::vector<unsigned>& channels);
 
     // If both the id and precision are valid, the id
     // gets tagged with the requested precision.