Add m-esr52 at 52.6.0

1 files changed, 642 insertions, 0 deletions

diff --git a/gfx/angle/src/compiler/translator/ConstantUnion.cpp b/gfx/angle/src/compiler/translator/ConstantUnion.cpp
new file mode 100644
index 000000000..66f444b0b
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/ConstantUnion.cpp
@@ -0,0 +1,642 @@
+//
+// Copyright 2016 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// ConstantUnion: Constant folding helper class.
+
+#include "compiler/translator/ConstantUnion.h"
+
+#include "base/numerics/safe_math.h"
+#include "common/mathutil.h"
+#include "compiler/translator/Diagnostics.h"
+
+namespace sh
+{
+
+namespace
+{
+
+template <typename T>
+T CheckedSum(base::CheckedNumeric<T> lhs,
+             base::CheckedNumeric<T> rhs,
+             TDiagnostics *diag,
+             const TSourceLoc &line)
+{
+    ASSERT(lhs.IsValid() && rhs.IsValid());
+    auto result = lhs + rhs;
+    if (!result.IsValid())
+    {
+        diag->error(line, "Addition out of range", "*", "");
+        return 0;
+    }
+    return result.ValueOrDefault(0);
+}
+
+template <typename T>
+T CheckedDiff(base::CheckedNumeric<T> lhs,
+              base::CheckedNumeric<T> rhs,
+              TDiagnostics *diag,
+              const TSourceLoc &line)
+{
+    ASSERT(lhs.IsValid() && rhs.IsValid());
+    auto result = lhs - rhs;
+    if (!result.IsValid())
+    {
+        diag->error(line, "Difference out of range", "*", "");
+        return 0;
+    }
+    return result.ValueOrDefault(0);
+}
+
+template <typename T>
+T CheckedMul(base::CheckedNumeric<T> lhs,
+             base::CheckedNumeric<T> rhs,
+             TDiagnostics *diag,
+             const TSourceLoc &line)
+{
+    ASSERT(lhs.IsValid() && rhs.IsValid());
+    auto result = lhs * rhs;
+    if (!result.IsValid())
+    {
+        diag->error(line, "Multiplication out of range", "*", "");
+        return 0;
+    }
+    return result.ValueOrDefault(0);
+}
+
+}  // anonymous namespace
+
+TConstantUnion::TConstantUnion()
+{
+    iConst = 0;
+    type   = EbtVoid;
+}
+
+bool TConstantUnion::cast(TBasicType newType, const TConstantUnion &constant)
+{
+    switch (newType)
+    {
+        case EbtFloat:
+            switch (constant.type)
+            {
+                case EbtInt:
+                    setFConst(static_cast<float>(constant.getIConst()));
+                    break;
+                case EbtUInt:
+                    setFConst(static_cast<float>(constant.getUConst()));
+                    break;
+                case EbtBool:
+                    setFConst(static_cast<float>(constant.getBConst()));
+                    break;
+                case EbtFloat:
+                    setFConst(static_cast<float>(constant.getFConst()));
+                    break;
+                default:
+                    return false;
+            }
+            break;
+        case EbtInt:
+            switch (constant.type)
+            {
+                case EbtInt:
+                    setIConst(static_cast<int>(constant.getIConst()));
+                    break;
+                case EbtUInt:
+                    setIConst(static_cast<int>(constant.getUConst()));
+                    break;
+                case EbtBool:
+                    setIConst(static_cast<int>(constant.getBConst()));
+                    break;
+                case EbtFloat:
+                    setIConst(static_cast<int>(constant.getFConst()));
+                    break;
+                default:
+                    return false;
+            }
+            break;
+        case EbtUInt:
+            switch (constant.type)
+            {
+                case EbtInt:
+                    setUConst(static_cast<unsigned int>(constant.getIConst()));
+                    break;
+                case EbtUInt:
+                    setUConst(static_cast<unsigned int>(constant.getUConst()));
+                    break;
+                case EbtBool:
+                    setUConst(static_cast<unsigned int>(constant.getBConst()));
+                    break;
+                case EbtFloat:
+                    setUConst(static_cast<unsigned int>(constant.getFConst()));
+                    break;
+                default:
+                    return false;
+            }
+            break;
+        case EbtBool:
+            switch (constant.type)
+            {
+                case EbtInt:
+                    setBConst(constant.getIConst() != 0);
+                    break;
+                case EbtUInt:
+                    setBConst(constant.getUConst() != 0);
+                    break;
+                case EbtBool:
+                    setBConst(constant.getBConst());
+                    break;
+                case EbtFloat:
+                    setBConst(constant.getFConst() != 0.0f);
+                    break;
+                default:
+                    return false;
+            }
+            break;
+        case EbtStruct:  // Struct fields don't get cast
+            switch (constant.type)
+            {
+                case EbtInt:
+                    setIConst(constant.getIConst());
+                    break;
+                case EbtUInt:
+                    setUConst(constant.getUConst());
+                    break;
+                case EbtBool:
+                    setBConst(constant.getBConst());
+                    break;
+                case EbtFloat:
+                    setFConst(constant.getFConst());
+                    break;
+                default:
+                    return false;
+            }
+            break;
+        default:
+            return false;
+    }
+
+    return true;
+}
+
+bool TConstantUnion::operator==(const int i) const
+{
+    return i == iConst;
+}
+
+bool TConstantUnion::operator==(const unsigned int u) const
+{
+    return u == uConst;
+}
+
+bool TConstantUnion::operator==(const float f) const
+{
+    return f == fConst;
+}
+
+bool TConstantUnion::operator==(const bool b) const
+{
+    return b == bConst;
+}
+
+bool TConstantUnion::operator==(const TConstantUnion &constant) const
+{
+    if (constant.type != type)
+        return false;
+
+    switch (type)
+    {
+        case EbtInt:
+            return constant.iConst == iConst;
+        case EbtUInt:
+            return constant.uConst == uConst;
+        case EbtFloat:
+            return constant.fConst == fConst;
+        case EbtBool:
+            return constant.bConst == bConst;
+        default:
+            return false;
+    }
+}
+
+bool TConstantUnion::operator!=(const int i) const
+{
+    return !operator==(i);
+}
+
+bool TConstantUnion::operator!=(const unsigned int u) const
+{
+    return !operator==(u);
+}
+
+bool TConstantUnion::operator!=(const float f) const
+{
+    return !operator==(f);
+}
+
+bool TConstantUnion::operator!=(const bool b) const
+{
+    return !operator==(b);
+}
+
+bool TConstantUnion::operator!=(const TConstantUnion &constant) const
+{
+    return !operator==(constant);
+}
+
+bool TConstantUnion::operator>(const TConstantUnion &constant) const
+{
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtInt:
+            return iConst > constant.iConst;
+        case EbtUInt:
+            return uConst > constant.uConst;
+        case EbtFloat:
+            return fConst > constant.fConst;
+        default:
+            return false;  // Invalid operation, handled at semantic analysis
+    }
+}
+
+bool TConstantUnion::operator<(const TConstantUnion &constant) const
+{
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtInt:
+            return iConst < constant.iConst;
+        case EbtUInt:
+            return uConst < constant.uConst;
+        case EbtFloat:
+            return fConst < constant.fConst;
+        default:
+            return false;  // Invalid operation, handled at semantic analysis
+    }
+}
+
+// static
+TConstantUnion TConstantUnion::add(const TConstantUnion &lhs,
+                                   const TConstantUnion &rhs,
+                                   TDiagnostics *diag,
+                                   const TSourceLoc &line)
+{
+    TConstantUnion returnValue;
+    ASSERT(lhs.type == rhs.type);
+    switch (lhs.type)
+    {
+        case EbtInt:
+            returnValue.setIConst(gl::WrappingSum<int>(lhs.iConst, rhs.iConst));
+            break;
+        case EbtUInt:
+            returnValue.setUConst(gl::WrappingSum<unsigned int>(lhs.uConst, rhs.uConst));
+            break;
+        case EbtFloat:
+            returnValue.setFConst(CheckedSum<float>(lhs.fConst, rhs.fConst, diag, line));
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+// static
+TConstantUnion TConstantUnion::sub(const TConstantUnion &lhs,
+                                   const TConstantUnion &rhs,
+                                   TDiagnostics *diag,
+                                   const TSourceLoc &line)
+{
+    TConstantUnion returnValue;
+    ASSERT(lhs.type == rhs.type);
+    switch (lhs.type)
+    {
+        case EbtInt:
+            returnValue.setIConst(gl::WrappingDiff<int>(lhs.iConst, rhs.iConst));
+            break;
+        case EbtUInt:
+            returnValue.setUConst(gl::WrappingDiff<unsigned int>(lhs.uConst, rhs.uConst));
+            break;
+        case EbtFloat:
+            returnValue.setFConst(CheckedDiff<float>(lhs.fConst, rhs.fConst, diag, line));
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+// static
+TConstantUnion TConstantUnion::mul(const TConstantUnion &lhs,
+                                   const TConstantUnion &rhs,
+                                   TDiagnostics *diag,
+                                   const TSourceLoc &line)
+{
+    TConstantUnion returnValue;
+    ASSERT(lhs.type == rhs.type);
+    switch (lhs.type)
+    {
+        case EbtInt:
+            returnValue.setIConst(gl::WrappingMul(lhs.iConst, rhs.iConst));
+            break;
+        case EbtUInt:
+            // Unsigned integer math in C++ is defined to be done in modulo 2^n, so we rely on that
+            // to implement wrapping multiplication.
+            returnValue.setUConst(lhs.uConst * rhs.uConst);
+            break;
+        case EbtFloat:
+            returnValue.setFConst(CheckedMul<float>(lhs.fConst, rhs.fConst, diag, line));
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+TConstantUnion TConstantUnion::operator%(const TConstantUnion &constant) const
+{
+    TConstantUnion returnValue;
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtInt:
+            returnValue.setIConst(iConst % constant.iConst);
+            break;
+        case EbtUInt:
+            returnValue.setUConst(uConst % constant.uConst);
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+// static
+TConstantUnion TConstantUnion::rshift(const TConstantUnion &lhs,
+                                      const TConstantUnion &rhs,
+                                      TDiagnostics *diag,
+                                      const TSourceLoc &line)
+{
+    TConstantUnion returnValue;
+    ASSERT(lhs.type == EbtInt || lhs.type == EbtUInt);
+    ASSERT(rhs.type == EbtInt || rhs.type == EbtUInt);
+    if ((rhs.type == EbtInt && (rhs.iConst < 0 || rhs.iConst > 31)) ||
+        (rhs.type == EbtUInt && rhs.uConst > 31u))
+    {
+        diag->error(line, "Undefined shift (operand out of range)", ">>", "");
+        switch (lhs.type)
+        {
+            case EbtInt:
+                returnValue.setIConst(0);
+                break;
+            case EbtUInt:
+                returnValue.setUConst(0u);
+                break;
+            default:
+                UNREACHABLE();
+        }
+        return returnValue;
+    }
+
+    switch (lhs.type)
+    {
+        case EbtInt:
+        {
+            unsigned int shiftOffset = 0;
+            switch (rhs.type)
+            {
+                case EbtInt:
+                    shiftOffset = static_cast<unsigned int>(rhs.iConst);
+                    break;
+                case EbtUInt:
+                    shiftOffset = rhs.uConst;
+                    break;
+                default:
+                    UNREACHABLE();
+            }
+            if (shiftOffset > 0)
+            {
+                // ESSL 3.00.6 section 5.9: "If E1 is a signed integer, the right-shift will extend
+                // the sign bit." In C++ shifting negative integers is undefined, so we implement
+                // extending the sign bit manually.
+                int lhsSafe        = lhs.iConst;
+                if (lhsSafe == std::numeric_limits<int>::min())
+                {
+                    // The min integer needs special treatment because only bit it has set is the
+                    // sign bit, which we clear later to implement safe right shift of negative
+                    // numbers.
+                    lhsSafe = -0x40000000;
+                    --shiftOffset;
+                }
+                if (shiftOffset > 0)
+                {
+                    bool extendSignBit = false;
+                    if (lhsSafe < 0)
+                    {
+                        extendSignBit = true;
+                        // Clear the sign bit so that bitshift right is defined in C++.
+                        lhsSafe &= 0x7fffffff;
+                        ASSERT(lhsSafe > 0);
+                    }
+                    returnValue.setIConst(lhsSafe >> shiftOffset);
+
+                    // Manually fill in the extended sign bit if necessary.
+                    if (extendSignBit)
+                    {
+                        int extendedSignBit = static_cast<int>(0xffffffffu << (31 - shiftOffset));
+                        returnValue.setIConst(returnValue.getIConst() | extendedSignBit);
+                    }
+                }
+                else
+                {
+                    returnValue.setIConst(lhsSafe);
+                }
+            }
+            else
+            {
+                returnValue.setIConst(lhs.iConst);
+            }
+            break;
+        }
+        case EbtUInt:
+            switch (rhs.type)
+            {
+                case EbtInt:
+                    returnValue.setUConst(lhs.uConst >> rhs.iConst);
+                    break;
+                case EbtUInt:
+                    returnValue.setUConst(lhs.uConst >> rhs.uConst);
+                    break;
+                default:
+                    UNREACHABLE();
+            }
+            break;
+
+        default:
+            UNREACHABLE();
+    }
+    return returnValue;
+}
+
+// static
+TConstantUnion TConstantUnion::lshift(const TConstantUnion &lhs,
+                                      const TConstantUnion &rhs,
+                                      TDiagnostics *diag,
+                                      const TSourceLoc &line)
+{
+    TConstantUnion returnValue;
+    ASSERT(lhs.type == EbtInt || lhs.type == EbtUInt);
+    ASSERT(rhs.type == EbtInt || rhs.type == EbtUInt);
+    if ((rhs.type == EbtInt && (rhs.iConst < 0 || rhs.iConst > 31)) ||
+        (rhs.type == EbtUInt && rhs.uConst > 31u))
+    {
+        diag->error(line, "Undefined shift (operand out of range)", "<<", "");
+        switch (lhs.type)
+        {
+            case EbtInt:
+                returnValue.setIConst(0);
+                break;
+            case EbtUInt:
+                returnValue.setUConst(0u);
+                break;
+            default:
+                UNREACHABLE();
+        }
+        return returnValue;
+    }
+
+    switch (lhs.type)
+    {
+        case EbtInt:
+            switch (rhs.type)
+            {
+                // Cast to unsigned integer before shifting, since ESSL 3.00.6 section 5.9 says that
+                // lhs is "interpreted as a bit pattern". This also avoids the possibility of signed
+                // integer overflow or undefined shift of a negative integer.
+                case EbtInt:
+                    returnValue.setIConst(
+                        static_cast<int>(static_cast<uint32_t>(lhs.iConst) << rhs.iConst));
+                    break;
+                case EbtUInt:
+                    returnValue.setIConst(
+                        static_cast<int>(static_cast<uint32_t>(lhs.iConst) << rhs.uConst));
+                    break;
+                default:
+                    UNREACHABLE();
+            }
+            break;
+
+        case EbtUInt:
+            switch (rhs.type)
+            {
+                case EbtInt:
+                    returnValue.setUConst(lhs.uConst << rhs.iConst);
+                    break;
+                case EbtUInt:
+                    returnValue.setUConst(lhs.uConst << rhs.uConst);
+                    break;
+                default:
+                    UNREACHABLE();
+            }
+            break;
+
+        default:
+            UNREACHABLE();
+    }
+    return returnValue;
+}
+
+TConstantUnion TConstantUnion::operator&(const TConstantUnion &constant) const
+{
+    TConstantUnion returnValue;
+    ASSERT(constant.type == EbtInt || constant.type == EbtUInt);
+    switch (type)
+    {
+        case EbtInt:
+            returnValue.setIConst(iConst & constant.iConst);
+            break;
+        case EbtUInt:
+            returnValue.setUConst(uConst & constant.uConst);
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+TConstantUnion TConstantUnion::operator|(const TConstantUnion &constant) const
+{
+    TConstantUnion returnValue;
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtInt:
+            returnValue.setIConst(iConst | constant.iConst);
+            break;
+        case EbtUInt:
+            returnValue.setUConst(uConst | constant.uConst);
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+TConstantUnion TConstantUnion::operator^(const TConstantUnion &constant) const
+{
+    TConstantUnion returnValue;
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtInt:
+            returnValue.setIConst(iConst ^ constant.iConst);
+            break;
+        case EbtUInt:
+            returnValue.setUConst(uConst ^ constant.uConst);
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+TConstantUnion TConstantUnion::operator&&(const TConstantUnion &constant) const
+{
+    TConstantUnion returnValue;
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtBool:
+            returnValue.setBConst(bConst && constant.bConst);
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+TConstantUnion TConstantUnion::operator||(const TConstantUnion &constant) const
+{
+    TConstantUnion returnValue;
+    ASSERT(type == constant.type);
+    switch (type)
+    {
+        case EbtBool:
+            returnValue.setBConst(bConst || constant.bConst);
+            break;
+        default:
+            UNREACHABLE();
+    }
+
+    return returnValue;
+}
+
+}  // namespace sh