Revert "Support precision emulation on HLSL"

src/compiler/translator/OutputHLSL.cpp

@@ -1677,12 +1677,6 @@ bool OutputHLSL::visitAggregate(Visit visit, TIntermAggregate *node)
                 out << DisambiguateFunctionName(node->getSequence());
                 out << (lod0 ? "Lod0(" : "(");
             }
-            else if (node->getNameObj().isInternal())
-            {
-                // This path is used for internal functions that don't have their definitions in the
-                // AST, such as precision emulation functions.
-                out << DecorateFunctionIfNeeded(node->getNameObj()) << "(";
-            }
             else
             {
                 TString name           = TFunction::unmangleName(node->getNameObj().getString());

src/compiler/translator/TranslatorHLSL.cpp

@@ -7,7 +7,6 @@
 #include "compiler/translator/TranslatorHLSL.h"
 
 #include "compiler/translator/ArrayReturnValueToOutParameter.h"
-#include "compiler/translator/EmulatePrecision.h"
 #include "compiler/translator/OutputHLSL.h"
 #include "compiler/translator/RemoveDynamicIndexing.h"
 #include "compiler/translator/RewriteElseBlocks.h"
@@ -53,18 +52,6 @@ void TranslatorHLSL::translate(TIntermNode *root, int compileOptions)
         sh::RewriteElseBlocks(root, getTemporaryIndex());
     }
 
-    bool precisionEmulation =
-        getResources().WEBGL_debug_shader_precision && getPragma().debugShaderPrecision;
-
-    if (precisionEmulation)
-    {
-        EmulatePrecision emulatePrecision(getSymbolTable(), getShaderVersion());
-        root->traverse(&emulatePrecision);
-        emulatePrecision.updateTree();
-        emulatePrecision.writeEmulationHelpers(getInfoSink().obj, getShaderVersion(),
-                                               getOutputType());
-    }
-
     sh::OutputHLSL outputHLSL(getShaderType(), getShaderVersion(), getExtensionBehavior(),
         getSourcePath(), getOutputType(), numRenderTargets, getUniforms(), compileOptions);
 

src/tests/BUILD.gn

@@ -25,7 +25,6 @@ test("angle_unittests") {
   if (angle_enable_hlsl) {
     sources +=
         rebase_path(unittests_gypi.angle_unittests_hlsl_sources, ".", "../..")
-    defines = [ "ANGLE_ENABLE_HLSL" ]
   }
 
   sources += [ "//gpu/angle_unittest_main.cc" ]

src/tests/angle_unittests.gypi

@@ -136,10 +136,6 @@
         ['OS=="win"',
         {
             # TODO(cwallez): make this angle_enable_hlsl instead (requires gyp file refactoring)
-            'defines':
-            [
-                'ANGLE_ENABLE_HLSL',
-            ],
             'sources':
             [
                 '<@(angle_unittests_hlsl_sources)',