From 39d5e711a700170724352e09834108a0428e9ebf Mon Sep 17 00:00:00 2001
From: GregF <greg@LunarG.com>
Date: Fri, 3 Jun 2016 09:53:47 -0600
Subject: [PATCH] remapper: do not eliminate interface variables in dce by
default
this is done by counting op_entrypoint as a use/def
---
SPIRV/SPVRemapper.cpp | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/SPIRV/SPVRemapper.cpp b/SPIRV/SPVRemapper.cpp
index 35dda17b7..1bbd58924 100755
--- a/SPIRV/SPVRemapper.cpp
+++ b/SPIRV/SPVRemapper.cpp
@@ -926,8 +926,17 @@ namespace spv {
// Count function variable use
process(
[&](spv::Op opCode, unsigned start) {
- if (opCode == spv::OpVariable) { ++varUseCount[asId(start+2)]; return true; }
- return false;
+ if (opCode == spv::OpVariable) {
+ ++varUseCount[asId(start+2)];
+ return true;
+ } else if (opCode == spv::OpEntryPoint) {
+ const int wordCount = asWordCount(start);
+ for (int i = 4; i < wordCount; i++) {
+ ++varUseCount[asId(start+i)];
+ }
+ return true;
+ } else
+ return false;
},
[&](spv::Id& id) { if (varUseCount[id]) ++varUseCount[id]; }
--
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