File aliasing.patch of Package glm

Index: glm/glm/detail/func_common.inl
===================================================================
--- glm.orig/glm/detail/func_common.inl
+++ glm/glm/detail/func_common.inl
@@ -850,7 +850,9 @@ namespace detail
 
 	GLM_FUNC_QUALIFIER int floatBitsToInt(float const & v)
 	{
-		return reinterpret_cast<int&>(const_cast<float&>(v));
+		int Bits;
+		std::memcpy(&Bits, &v, sizeof(Bits));
+		return Bits;
 	}
 
 	template <template <typename, precision> class vecType, precision P>
@@ -861,7 +863,9 @@ namespace detail
 
 	GLM_FUNC_QUALIFIER uint floatBitsToUint(float const & v)
 	{
-		return reinterpret_cast<uint&>(const_cast<float&>(v));
+		uint Bits;
+		std::memcpy(&Bits, &v, sizeof(Bits));
+		return Bits;
 	}
 
 	template <template <typename, precision> class vecType, precision P>
@@ -872,7 +876,9 @@ namespace detail
 
 	GLM_FUNC_QUALIFIER float intBitsToFloat(int const & v)
 	{
-		return reinterpret_cast<float&>(const_cast<int&>(v));
+		float Float;
+		std::memcpy(&Float, &v, sizeof(Float));
+		return Float;
 	}
 
 	template <template <typename, precision> class vecType, precision P>
@@ -883,7 +889,9 @@ namespace detail
 
 	GLM_FUNC_QUALIFIER float uintBitsToFloat(uint const & v)
 	{
-		return reinterpret_cast<float&>(const_cast<uint&>(v));
+		float Float;
+		std::memcpy(&Float, &v, sizeof(Float));
+		return Float;
 	}
 
 	template <template <typename, precision> class vecType, precision P>
Index: glm/glm/detail/func_integer.inl
===================================================================
--- glm.orig/glm/detail/func_integer.inl
+++ glm/glm/detail/func_integer.inl
@@ -171,10 +171,8 @@ namespace glm
 		GLM_STATIC_ASSERT(sizeof(uint) == sizeof(uint32), "uint and uint32 size mismatch");
 
 		uint64 Value64 = static_cast<uint64>(x) * static_cast<uint64>(y);
-		uint32* PointerMSB = (reinterpret_cast<uint32*>(&Value64) + 1);
-		msb = *PointerMSB;
-		uint32* PointerLSB = (reinterpret_cast<uint32*>(&Value64) + 0);
-		lsb = *PointerLSB;
+		msb = Value64 >> 32;
+		lsb = Value64;
 	}
 
 	template <>
@@ -232,10 +230,8 @@ namespace glm
 		GLM_STATIC_ASSERT(sizeof(int) == sizeof(int32), "int and int32 size mismatch");
 
 		int64 Value64 = static_cast<int64>(x) * static_cast<int64>(y);
-		int32* PointerMSB = (reinterpret_cast<int32*>(&Value64) + 1);
-		msb = *PointerMSB;
-		int32* PointerLSB = (reinterpret_cast<int32*>(&Value64));
-		lsb = *PointerLSB;
+		msb = Value64 >> 32;
+		lsb = Value64;
 	}
 
 	template <>
Index: glm/glm/detail/func_packing.inl
===================================================================
--- glm.orig/glm/detail/func_packing.inl
+++ glm/glm/detail/func_packing.inl
@@ -35,24 +35,32 @@ namespace glm
 	GLM_FUNC_QUALIFIER uint packUnorm2x16(vec2 const & v)
 	{
 		u16vec2 Topack(round(clamp(v, 0.0f, 1.0f) * 65535.0f));
-		return reinterpret_cast<uint&>(Topack);
+		uint Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER vec2 unpackUnorm2x16(uint const & p)
 	{
-		vec2 Unpack(reinterpret_cast<u16vec2 const &>(p));
+		u16vec2 Packed;
+		std::memcpy(&Packed, &p, sizeof(Packed));
+		vec2 Unpack(Packed);
 		return Unpack * float(1.5259021896696421759365224689097e-5); // 1.0 / 65535.0
 	}
 
 	GLM_FUNC_QUALIFIER uint packSnorm2x16(vec2 const & v)
 	{
 		i16vec2 Topack(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
-		return reinterpret_cast<uint32&>(Topack);
+		uint32 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER vec2 unpackSnorm2x16(uint const & p)
 	{
-		vec2 Unpack(reinterpret_cast<i16vec2 const &>(p));
+		i16vec2 Packed;
+		std::memcpy(&Packed, &p, sizeof(Packed));
+		vec2 Unpack(Packed);
 		return clamp(
 			Unpack * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f,
 			-1.0f, 1.0f);
@@ -61,24 +69,32 @@ namespace glm
 	GLM_FUNC_QUALIFIER uint packUnorm4x8(vec4 const & v)
 	{
 		u8vec4 Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f));
-		return reinterpret_cast<uint&>(Topack);
+		uint Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER vec4 unpackUnorm4x8(uint const & p)
 	{
-		vec4 Unpack(reinterpret_cast<u8vec4 const&>(p));
+		u8vec4 Packed;
+		std::memcpy(&Packed, &p, sizeof(Packed));
+		vec4 Unpack(Packed);
 		return Unpack * float(0.0039215686274509803921568627451); // 1 / 255
 	}
 	
 	GLM_FUNC_QUALIFIER uint packSnorm4x8(vec4 const & v)
 	{
 		i8vec4 Topack(round(clamp(v ,-1.0f, 1.0f) * 127.0f));
-		return reinterpret_cast<uint&>(Topack);
+		uint Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 	
 	GLM_FUNC_QUALIFIER glm::vec4 unpackSnorm4x8(uint const & p)
 	{
-		vec4 Unpack(reinterpret_cast<i8vec4 const &>(p));
+		i8vec4 Packed;
+		std::memcpy(&Packed, &p, sizeof(Packed));
+		vec4 Unpack(Packed);
 		return clamp(
 			Unpack * 0.0078740157480315f, // 1.0f / 127.0f
 			-1.0f, 1.0f);
@@ -86,12 +102,16 @@ namespace glm
 
 	GLM_FUNC_QUALIFIER double packDouble2x32(uvec2 const & v)
 	{
-		return reinterpret_cast<double const &>(v);
+		double Packed;
+		std::memcpy(&Packed, &v, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER uvec2 unpackDouble2x32(double const & v)
 	{
-		return reinterpret_cast<uvec2 const &>(v);
+		uvec2 Unpack;
+		std::memcpy(&Unpack, &v, sizeof(Unpack));
+		return Unpack;
 	}
 
 	GLM_FUNC_QUALIFIER uint packHalf2x16(vec2 const & v)
@@ -100,13 +120,15 @@ namespace glm
 			detail::toFloat16(v.x),
 			detail::toFloat16(v.y));
 
-		uint * Result = reinterpret_cast<uint*>(&Unpack);
-		return *Result;
+		uint Packed;
+		std::memcpy(&Packed, &Unpack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER vec2 unpackHalf2x16(uint const & v)
 	{
-		i16vec2 Unpack(reinterpret_cast<i16vec2 const &>(v));
+		i16vec2 Unpack;
+		std::memcpy(&Unpack, &v, sizeof(Unpack));
 	
 		return vec2(
 			detail::toFloat32(Unpack.x), 
Index: glm/glm/detail/setup.hpp
===================================================================
--- glm.orig/glm/detail/setup.hpp
+++ glm/glm/detail/setup.hpp
@@ -30,6 +30,7 @@
 #define GLM_SETUP_INCLUDED
 
 #include <cassert>
+#include <cstring>
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 // Version
Index: glm/glm/gtc/packing.inl
===================================================================
--- glm.orig/glm/gtc/packing.inl
+++ glm/glm/gtc/packing.inl
@@ -145,7 +145,9 @@ namespace detail
 		else if(glm::isinf(x))
 			return 0x1f << 6;
 
-		return float2packed11(reinterpret_cast<uint&>(x));
+		uint Topack;
+		std::memcpy(&Topack, &x, sizeof(Topack));
+		return float2packed11(Topack);
 	}
 
 	GLM_FUNC_QUALIFIER float packed11bitToFloat(glm::uint x)
@@ -158,7 +160,9 @@ namespace detail
 			return ~0;//Inf
 
 		uint result = packed11ToFloat(x);
-		return reinterpret_cast<float&>(result);
+		float Unpack;
+		std::memcpy(&Unpack, &result, sizeof(Unpack));
+		return Unpack;
 	}
 
 	GLM_FUNC_QUALIFIER glm::uint floatTo10bit(float x)
@@ -170,7 +174,9 @@ namespace detail
 		else if(glm::isinf(x))
 			return 0x1f << 5;
 
-		return float2packed10(reinterpret_cast<uint&>(x));
+		uint Topack;
+		std::memcpy(&Topack, &x, sizeof(Topack));
+		return float2packed10(Topack);
 	}
 
 	GLM_FUNC_QUALIFIER float packed10bitToFloat(glm::uint x)
@@ -183,7 +189,9 @@ namespace detail
 			return ~0;//Inf
 
 		uint result = packed10ToFloat(x);
-		return reinterpret_cast<float&>(result);
+		float Unpack;
+		std::memcpy(&Unpack, &result, sizeof(Unpack));
+		return Unpack;
 	}
 
 //	GLM_FUNC_QUALIFIER glm::uint f11_f11_f10(float x, float y, float z)
@@ -231,21 +239,24 @@ namespace detail
 	GLM_FUNC_QUALIFIER uint16 packUnorm2x8(vec2 const & v)
 	{
 		u8vec2 Topack(round(clamp(v, 0.0f, 1.0f) * 255.0f));
-		uint16* Packed = reinterpret_cast<uint16*>(&Topack);
-		return *Packed;
+		uint16 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 	
 	GLM_FUNC_QUALIFIER vec2 unpackUnorm2x8(uint16 const & p)
 	{
-		u8vec2* Unpacked = reinterpret_cast<u8vec2*>(const_cast<uint16*>(&p));
-		return vec2(*Unpacked) * float(0.0039215686274509803921568627451); // 1 / 255
+		u8vec2 Unpack;
+		std::memcpy(&Unpack, &p, sizeof(Unpack));
+		return vec2(Unpack) * float(0.0039215686274509803921568627451); // 1 / 255
 	}
 
 	GLM_FUNC_QUALIFIER uint8 packSnorm1x8(float const & v)
 	{
 		int8 Topack(static_cast<int8>(round(clamp(v ,-1.0f, 1.0f) * 127.0f)));
-		uint8* Packed = reinterpret_cast<uint8*>(&Topack);
-		return *Packed;
+		uint8 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 	
 	GLM_FUNC_QUALIFIER float unpackSnorm1x8(uint8 const & p)
@@ -259,15 +270,17 @@ namespace detail
 	GLM_FUNC_QUALIFIER uint16 packSnorm2x8(vec2 const & v)
 	{
 		i8vec2 Topack(round(clamp(v ,-1.0f, 1.0f) * 127.0f));
-		uint16* Packed = reinterpret_cast<uint16*>(&Topack);
-		return *Packed;
+		uint16 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 	
 	GLM_FUNC_QUALIFIER vec2 unpackSnorm2x8(uint16 const & p)
 	{
-		i8vec2* Unpack = reinterpret_cast<i8vec2*>(const_cast<uint16*>(&p));
+		i8vec2 Unpack;
+		std::memcpy(&Unpack, &p, sizeof(Unpack));
 		return clamp(
-			vec2(*Unpack) * 0.00787401574803149606299212598425f, // 1.0f / 127.0f
+			vec2(Unpack) * 0.00787401574803149606299212598425f, // 1.0f / 127.0f
 			-1.0f, 1.0f);
 	}
 	
@@ -285,21 +298,24 @@ namespace detail
 	GLM_FUNC_QUALIFIER uint64 packUnorm4x16(vec4 const & v)
 	{
 		u16vec4 Topack(round(clamp(v , 0.0f, 1.0f) * 65535.0f));
-		uint64* Packed = reinterpret_cast<uint64*>(&Topack);
-		return *Packed;
+		uint64 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER vec4 unpackUnorm4x16(uint64 const & p)
 	{
-		u16vec4* Unpack = reinterpret_cast<u16vec4*>(const_cast<uint64*>(&p));
-		return vec4(*Unpack) * 1.5259021896696421759365224689097e-5f; // 1.0 / 65535.0
+		u16vec4 Unpack;
+		std::memcpy(&Unpack, &p, sizeof(Unpack));
+		return vec4(Unpack) * 1.5259021896696421759365224689097e-5f; // 1.0 / 65535.0
 	}
 
 	GLM_FUNC_QUALIFIER uint16 packSnorm1x16(float const & v)
 	{
 		int16 Topack = static_cast<int16>(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
-		uint16* Packed = reinterpret_cast<uint16*>(&Topack);
-		return *Packed;
+		uint16 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER float unpackSnorm1x16(uint16 const & p)
@@ -313,29 +329,33 @@ namespace detail
 	GLM_FUNC_QUALIFIER uint64 packSnorm4x16(vec4 const & v)
 	{
 		i16vec4 Topack = static_cast<i16vec4>(round(clamp(v ,-1.0f, 1.0f) * 32767.0f));
-		uint64* Packed = reinterpret_cast<uint64*>(&Topack);
-		return *Packed;
+		uint64 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER vec4 unpackSnorm4x16(uint64 const & p)
 	{
-		i16vec4* Unpack(reinterpret_cast<i16vec4*>(const_cast<uint64*>(&p)));
+		i16vec4 Unpack;
+		std::memcpy(&Unpack, &p, sizeof(Unpack));
 		return clamp(
-			vec4(*Unpack) * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f,
+			vec4(Unpack) * 3.0518509475997192297128208258309e-5f, //1.0f / 32767.0f,
 			-1.0f, 1.0f);
 	}
 
 	GLM_FUNC_QUALIFIER uint16 packHalf1x16(float const & v)
 	{
 		int16 Topack = detail::toFloat16(v);
-		uint16* Packed = reinterpret_cast<uint16*>(&Topack);
-		return *Packed;
+		uint16 Packed;
+		std::memcpy(&Packed, &Topack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER float unpackHalf1x16(uint16 const & v)
 	{
-		int16* Unpack = reinterpret_cast<int16*>(const_cast<uint16*>(&v));
-		return detail::toFloat32(*Unpack);
+		int16 Unpack;
+		std::memcpy(&Unpack, &v, sizeof(Unpack));
+		return detail::toFloat32(Unpack);
 	}
 
 	GLM_FUNC_QUALIFIER uint64 packHalf4x16(glm::vec4 const & v)
@@ -346,14 +366,15 @@ namespace detail
 			detail::toFloat16(v.z),
 			detail::toFloat16(v.w));
 
-		uint64* Packed = reinterpret_cast<uint64*>(&Unpack);
-		return *Packed;
+		uint64 Packed;
+		std::memcpy(&Packed, &Unpack, sizeof(Packed));
+		return Packed;
 	}
 
 	GLM_FUNC_QUALIFIER glm::vec4 unpackHalf4x16(uint64 const & v)
 	{
-		i16vec4* p = reinterpret_cast<i16vec4*>(const_cast<uint64*>(&v));
-		i16vec4 Unpack(*p);
+		i16vec4 Unpack;
+		std::memcpy(&Unpack, &v, sizeof(Unpack));
 	
 		return vec4(
 			detail::toFloat32(Unpack.x), 
Index: glm/test/core/core_func_common.cpp
===================================================================
--- glm.orig/test/core/core_func_common.cpp
+++ glm/test/core/core_func_common.cpp
@@ -67,7 +67,8 @@ int test_floatBitsToInt()
 		float A = 1.0f;
 		int B = glm::floatBitsToInt(A);
 		float C = glm::intBitsToFloat(B);
-		int D = *(int*)&A;
+		int D;
+		std::memcpy(&D, &A, sizeof(D));
 		Error += B == D ? 0 : 1;
 		Error += A == C ? 0 : 1;
 	}
@@ -76,8 +77,11 @@ int test_floatBitsToInt()
 		glm::vec2 A(1.0f, 2.0f);
 		glm::ivec2 B = glm::floatBitsToInt(A);
 		glm::vec2 C = glm::intBitsToFloat(B);
-		Error += B.x == *(int*)&(A.x) ? 0 : 1;
-		Error += B.y == *(int*)&(A.y) ? 0 : 1;
+		int D;
+		std::memcpy(&D, &A.x, sizeof(D));
+		Error += B.x == D ? 0 : 1;
+		std::memcpy(&D, &A.y, sizeof(D));
+		Error += B.y == D ? 0 : 1;
 		Error += A == C? 0 : 1;
 	}
 
@@ -85,9 +89,13 @@ int test_floatBitsToInt()
 		glm::vec3 A(1.0f, 2.0f, 3.0f);
 		glm::ivec3 B = glm::floatBitsToInt(A);
 		glm::vec3 C = glm::intBitsToFloat(B);
-		Error += B.x == *(int*)&(A.x) ? 0 : 1;
-		Error += B.y == *(int*)&(A.y) ? 0 : 1;
-		Error += B.z == *(int*)&(A.z) ? 0 : 1;
+		int D;
+		std::memcpy(&D, &A.x, sizeof(D));
+		Error += B.x == D ? 0 : 1;
+		std::memcpy(&D, &A.y, sizeof(D));
+		Error += B.y == D ? 0 : 1;
+		std::memcpy(&D, &A.z, sizeof(D));
+		Error += B.z == D ? 0 : 1;
 		Error += A == C? 0 : 1;
 	}
 	
@@ -95,10 +103,15 @@ int test_floatBitsToInt()
 		glm::vec4 A(1.0f, 2.0f, 3.0f, 4.0f);
 		glm::ivec4 B = glm::floatBitsToInt(A);
 		glm::vec4 C = glm::intBitsToFloat(B);
-		Error += B.x == *(int*)&(A.x) ? 0 : 1;
-		Error += B.y == *(int*)&(A.y) ? 0 : 1;
-		Error += B.z == *(int*)&(A.z) ? 0 : 1;
-		Error += B.w == *(int*)&(A.w) ? 0 : 1;
+		int D;
+		std::memcpy(&D, &A.x, sizeof(D));
+		Error += B.x == D ? 0 : 1;
+		std::memcpy(&D, &A.y, sizeof(D));
+		Error += B.y == D ? 0 : 1;
+		std::memcpy(&D, &A.z, sizeof(D));
+		Error += B.z == D ? 0 : 1;
+		std::memcpy(&D, &A.w, sizeof(D));
+		Error += B.w == D ? 0 : 1;
 		Error += A == C? 0 : 1;
 	}
 	
@@ -113,7 +126,9 @@ int test_floatBitsToUint()
 		float A = 1.0f;
 		glm::uint B = glm::floatBitsToUint(A);
 		float C = glm::intBitsToFloat(B);
-		Error += B == *(glm::uint*)&A ? 0 : 1;
+		glm::uint D;
+		std::memcpy(&D, &A, sizeof(D));
+		Error += B == D ? 0 : 1;
 		Error += A == C? 0 : 1;
 	}
 	
@@ -121,8 +136,11 @@ int test_floatBitsToUint()
 		glm::vec2 A(1.0f, 2.0f);
 		glm::uvec2 B = glm::floatBitsToUint(A);
 		glm::vec2 C = glm::uintBitsToFloat(B);
-		Error += B.x == *(glm::uint*)&(A.x) ? 0 : 1;
-		Error += B.y == *(glm::uint*)&(A.y) ? 0 : 1;
+		glm::uint D;
+		std::memcpy(&D, &A.x, sizeof(D));
+		Error += B.x == D ? 0 : 1;
+		std::memcpy(&D, &A.y, sizeof(D));
+		Error += B.y == D ? 0 : 1;
 		Error += A == C ? 0 : 1;
 	}
 	
@@ -130,9 +148,13 @@ int test_floatBitsToUint()
 		glm::vec3 A(1.0f, 2.0f, 3.0f);
 		glm::uvec3 B = glm::floatBitsToUint(A);
 		glm::vec3 C = glm::uintBitsToFloat(B);
-		Error += B.x == *(glm::uint*)&(A.x) ? 0 : 1;
-		Error += B.y == *(glm::uint*)&(A.y) ? 0 : 1;
-		Error += B.z == *(glm::uint*)&(A.z) ? 0 : 1;
+		glm::uint D;
+		std::memcpy(&D, &A.x, sizeof(D));
+		Error += B.x == D ? 0 : 1;
+		std::memcpy(&D, &A.y, sizeof(D));
+		Error += B.y == D ? 0 : 1;
+		std::memcpy(&D, &A.z, sizeof(D));
+		Error += B.z == D ? 0 : 1;
 		Error += A == C? 0 : 1;
 	}
 	
@@ -140,10 +162,15 @@ int test_floatBitsToUint()
 		glm::vec4 A(1.0f, 2.0f, 3.0f, 4.0f);
 		glm::uvec4 B = glm::floatBitsToUint(A);
 		glm::vec4 C = glm::uintBitsToFloat(B);
-		Error += B.x == *(glm::uint*)&(A.x) ? 0 : 1;
-		Error += B.y == *(glm::uint*)&(A.y) ? 0 : 1;
-		Error += B.z == *(glm::uint*)&(A.z) ? 0 : 1;
-		Error += B.w == *(glm::uint*)&(A.w) ? 0 : 1;
+		glm::uint D;
+		std::memcpy(&D, &A.x, sizeof(D));
+		Error += B.x == D ? 0 : 1;
+		std::memcpy(&D, &A.y, sizeof(D));
+		Error += B.y == D ? 0 : 1;
+		std::memcpy(&D, &A.z, sizeof(D));
+		Error += B.z == D ? 0 : 1;
+		std::memcpy(&D, &A.w, sizeof(D));
+		Error += B.w == D ? 0 : 1;
 		Error += A == C? 0 : 1;
 	}