Revert "Support constant folding of trigonometry built-ins"

Part of a chain breaking the clang build:

http://build.chromium.org/p/chromium.gpu.fyi/builders/GPU%20Linux%20Builder/builds/33588

This reverts commit af930db150.

Change-Id: Ic0bf09b4088a1ee285fed0fbd77dfc4c682fcd12
Reviewed-on: https://chromium-review.googlesource.com/265144
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>

src/compiler/translator/IntermNode.cpp

@@ -10,7 +10,6 @@
 
 #include <float.h>
 #include <limits.h>
-#include <math.h>
 #include <algorithm>
 
 #include "compiler/translator/HashNames.h"
@@ -20,10 +19,6 @@
 namespace
 {
 
-const float kPi = 3.14159265358979323846f;
-const float kDegreesToRadiansMultiplier = kPi / 180.0f;
-const float kRadiansToDegreesMultiplier = 180.0f / kPi;
-
 TPrecision GetHigherPrecision(TPrecision left, TPrecision right)
 {
     return left > right ? left : right;
@@ -1190,100 +1185,6 @@ TIntermTyped *TIntermConstantUnion::fold(
                 }
                 break;
 
-              case EOpRadians:
-                if (getType().getBasicType() == EbtFloat)
-                {
-                    tempConstArray[i].setFConst(kDegreesToRadiansMultiplier * unionArray[i].getFConst());
-                    break;
-                }
-                infoSink.info.message(
-                    EPrefixInternalError, getLine(),
-                    "Unary operation not folded into constant");
-                return nullptr;
-
-              case EOpDegrees:
-                if (getType().getBasicType() == EbtFloat)
-                {
-                    tempConstArray[i].setFConst(kRadiansToDegreesMultiplier * unionArray[i].getFConst());
-                    break;
-                }
-                infoSink.info.message(
-                    EPrefixInternalError, getLine(),
-                    "Unary operation not folded into constant");
-                return nullptr;
-
-              case EOpSin:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&sin), infoSink, &tempConstArray[i]))
-                   return nullptr;
-                break;
-
-              case EOpCos:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&cos), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpTan:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&tan), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpAsin:
-                // For asin(x), results are undefined if |x| > 1, we are choosing to set result to 0.
-                if (getType().getBasicType() == EbtFloat && abs(unionArray[i].getFConst()) > 1.0)
-                    tempConstArray[i].setFConst(0.0);
-                else if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&asin), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpAcos:
-                // For acos(x), results are undefined if |x| > 1, we are choosing to set result to 0.
-                if (getType().getBasicType() == EbtFloat && abs(unionArray[i].getFConst()) > 1.0)
-                    tempConstArray[i].setFConst(0.0);
-                else if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&acos), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpAtan:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&atan), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpSinh:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&sinh), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpCosh:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&cosh), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpTanh:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&tanh), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpAsinh:
-                if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&asinh), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpAcosh:
-                // For acosh(x), results are undefined if x < 1, we are choosing to set result to 0.
-                if (getType().getBasicType() == EbtFloat && unionArray[i].getFConst() < 1.0)
-                    tempConstArray[i].setFConst(0.0);
-                else if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&acosh), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
-              case EOpAtanh:
-                // For atanh(x), results are undefined if |x| >= 1, we are choosing to set result to 0.
-                if (getType().getBasicType() == EbtFloat && abs(unionArray[i].getFConst()) >= 1.0)
-                    tempConstArray[i].setFConst(0.0);
-                else if (!foldFloatTypeUnary(unionArray[i], static_cast<FloatTypeUnaryFunc>(&atanh), infoSink, &tempConstArray[i]))
-                    return nullptr;
-                break;
-
               default:
                 return NULL;
             }
@@ -1294,23 +1195,6 @@ TIntermTyped *TIntermConstantUnion::fold(
     }
 }
 
-bool TIntermConstantUnion::foldFloatTypeUnary(const ConstantUnion &parameter, FloatTypeUnaryFunc builtinFunc,
-                                              TInfoSink &infoSink, ConstantUnion *result) const
-{
-    ASSERT(builtinFunc);
-
-    if (getType().getBasicType() == EbtFloat)
-    {
-        result->setFConst(builtinFunc(parameter.getFConst()));
-        return true;
-    }
-
-    infoSink.info.message(
-        EPrefixInternalError, getLine(),
-        "Unary operation not folded into constant");
-    return false;
-}
-
 // static
 TString TIntermTraverser::hash(const TString &name, ShHashFunction64 hashFunction)
 {

src/compiler/translator/IntermNode.h

@@ -292,10 +292,6 @@ class TIntermConstantUnion : public TIntermTyped
 
   protected:
     ConstantUnion *mUnionArrayPointer;
-
-  private:
-    typedef float(*FloatTypeUnaryFunc) (float);
-    bool foldFloatTypeUnary(const ConstantUnion &parameter, FloatTypeUnaryFunc builtinFunc, TInfoSink &infoSink, ConstantUnion *result) const;
 };
 
 //