commit 94ac7b786f2ae1e928ca872e58ca4399df96532a
author Zhenyao Mo <zmo@chromium.org> Wed Oct 15 18:22:08 2014 -0700
committer Zhenyao Mo <zmo@chromium.org> Tue Oct 21 17:31:41 2014 +0000
tree ad567670811b17da0bf68ebf6edd2f9c45c76711
parent f99b0cff3cde430d246b04a3c305df5170fca171

Invariant related processing.

* Fix a bug in PreProcessor for STDGL pragma.
* Record all invariant settings and set them in ShaderVariable.
* Write #pragma STDGL invariant(all) in GL

BUG=angle:776
TEST=https://www.khronos.org/registry/webgl/sdk/tests/conformance/glsl/misc/shaders-with-invariance.html

Change-Id: Ie28b75480deed79f0c9f26e3b98f1778d1290182
Reviewed-on: https://chromium-review.googlesource.com/223610
Tested-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/Compiler.cpp

diff --git a/src/compiler/translator/Compiler.cpp b/src/compiler/translator/Compiler.cpp
index 8e1743d..2824064 100644
--- a/src/compiler/translator/Compiler.cpp
+++ b/src/compiler/translator/Compiler.cpp
@@ -181,6 +181,12 @@
 
     if (success)
     {
+        mPragma = parseContext.pragma();
+        if (mPragma.stdgl.invariantAll)
+        {
+            symbolTable.setGlobalInvariant();
+        }
+
         TIntermNode* root = parseContext.treeRoot;
         success = intermediate.postProcess(root);
 
@@ -508,7 +514,8 @@
                                  &uniforms,
                                  &varyings,
                                  &interfaceBlocks,
-                                 hashFunction);
+                                 hashFunction,
+                                 symbolTable);
     root->traverse(&collect);
 
     // For backwards compatiblity with ShGetVariableInfo, expand struct
@@ -582,3 +589,10 @@
 {
     return builtInFunctionEmulator;
 }
+
+void TCompiler::writePragma()
+{
+    TInfoSinkBase &sink = infoSink.obj;
+    if (mPragma.stdgl.invariantAll)
+        sink << "#pragma STDGL invariant(all)\n";
+}