- Removed -fno-strict-aliasing from the GCC flags for ZDoom and fixed the

issues that caused its inclusion. Is an optimized GCC build any faster for being able to use strict aliasing rules? I dunno. It's still slower than a VC++ build. I did run into two cases where TAutoSegIterator caused intractable problems with breaking strict aliasing rules, so I removed the templating from it, and the caller is now responsible for casting the probe value from void *. - Removed #include "autosegs.h" from several files that did not need it (in particular, dobject.h when not compiling with VC++). SVN r1743 (trunk)
2024-11-15 08:41:59 +00:00 · 2009-08-02 03:38:57 +00:00 · 2009-08-02 03:38:57 +00:00 · 93202a5488
commit 93202a5488
parent d3792c2291
35 changed files with 298 additions and 189 deletions
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@ -1,4 +1,16 @@
-July 31, 2009
+August 1, 2009
+- Removed -fno-strict-aliasing from the GCC flags for ZDoom and fixed the
+  issues that caused its inclusion. Is an optimized GCC build any faster
+  for being able to use strict aliasing rules? I dunno. It's still slower
+  than a VC++ build.
+  
+  I did run into two cases where TAutoSegIterator caused intractable problems
+  with breaking strict aliasing rules, so I removed the templating from it,
+  and the caller is now responsible for casting the probe value from void *.
+
+July 31, 2009
+- Removed #include "autosegs.h" from several files that did not need it
+  (in particular, dobject.h when not compiling with VC++).
 - gdtoa now performs all type aliasing through unions. -Wall has been added
  to the GCC flags for the library to help verify this.
 - Changed A_SpawnFly to do nothing if reactiontime is 0. Reactiontime was
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@ -324,7 +324,14 @@ if( CMAKE_COMPILER_IS_GNUCXX )
 	set( CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} ${REL_CXX_FLAGS}" )
 	set( CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} ${REL_CXX_FLAGS}" )

-	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused -fno-strict-aliasing" )
+	set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-unused" )
+
+	# Remove extra warnings when using the official DirectX headers.
+	# Also, TDM-GCC 4.4.0 no longer accepts glibc-style printf formats as valid,
+	# which is a royal pain. The previous version I had been using was fine with them.
+	if( WIN32 )
+		set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-pragmas -Wno-comment -Wno-format" )
+	endif( WIN32 )

 	if( NOT NO_STRIP )
 		set (CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} -s" )
--- a/src/autosegs.h
+++ b/src/autosegs.h
@ -35,22 +35,6 @@
 #ifndef AUTOSEGS_H
 #define AUTOSEGS_H

-#ifdef __GNUC__
-#ifdef __MACH__
-#define AREG_SECTION "__DATA,areg"
-#define CREG_SECTION "__DATA,creg"
-#define GREG_SECTION "__DATA,greg"
-#define MREG_SECTION "__DATA,mreg"
-#define YREG_SECTION "__DATA,yreg"
-#else
-#define AREG_SECTION "areg"
-#define CREG_SECTION "creg"
-#define GREG_SECTION "greg"
-#define MREG_SECTION "mreg"
-#define YREG_SECTION "yreg"
-#endif
-#endif
-
 #define REGMARKER(x) (x)
 typedef void *REGINFO;

@ -74,56 +58,45 @@ extern REGINFO MRegTail;
 extern REGINFO YRegHead;
 extern REGINFO YRegTail;

-template<class T, REGINFO *_head, REGINFO *_tail>
-class TAutoSegIteratorNoArrow
+class FAutoSegIterator
 {
 	public:
-		TAutoSegIteratorNoArrow ()
+		FAutoSegIterator(REGINFO &head, REGINFO &tail)
 		{
 			// Weirdness. Mingw's linker puts these together backwards.
-			if (_head < _tail)
+			if (&head <= &tail)
 			{
-				Head = _head;
-				Tail = _tail;
+				Head = &head;
+				Tail = &tail;
 			}
 			else
 			{
-				Head = _tail;
-				Tail = _head;
+				Head = &tail;
+				Tail = &head;
 			}
-			Probe = (T *)REGMARKER(Head);
+			Probe = Head;
 		}
-		operator T () const
+		REGINFO operator*() const
 		{
 			return *Probe;
 		}
-		TAutoSegIteratorNoArrow &operator++()
+		FAutoSegIterator &operator++()
 		{
 			do
 			{
 				++Probe;
-			} while (*Probe == 0 && Probe < (T *)REGMARKER(Tail));
+			} while (*Probe == 0 && Probe < Tail);
 			return *this;
 		}
-		void Reset ()
+		void Reset()
 		{
-			Probe = (T *)REGMARKER(Head);
+			Probe = Head;
 		}

 	protected:
-		T *Probe;
+		REGINFO *Probe;
 		REGINFO *Head;
 		REGINFO *Tail;
 };

-template<class T, REGINFO *head, REGINFO *tail>
-class TAutoSegIterator : public TAutoSegIteratorNoArrow<T, head, tail>
-{
-	public:
-		T operator->() const
-		{
-			return *(this->Probe);
-		}
-};
-
 #endif
--- a/src/autostart.cpp
+++ b/src/autostart.cpp
@ -86,11 +86,13 @@ void *YRegHead = 0;

 #elif defined(__GNUC__)

-void *ARegHead __attribute__((section(AREG_SECTION))) = 0;
-void *CRegHead __attribute__((section(CREG_SECTION))) = 0;
-void *GRegHead __attribute__((section(GREG_SECTION))) = 0;
-void *MRegHead __attribute__((section(MREG_SECTION))) = 0;
-void *YRegHead __attribute__((section(YREG_SECTION))) = 0;
+#include "doomtype.h"
+
+void *ARegHead __attribute__((section(SECTION_AREG))) = 0;
+void *CRegHead __attribute__((section(SECTION_CREG))) = 0;
+void *GRegHead __attribute__((section(SECTION_GREG))) = 0;
+void *MRegHead __attribute__((section(SECTION_MREG))) = 0;
+void *YRegHead __attribute__((section(SECTION_YREG))) = 0;

 #else

--- a/src/autozend.cpp
+++ b/src/autozend.cpp
@ -58,11 +58,13 @@ void *YRegTail = 0;

 #elif defined(__GNUC__)

-void *ARegTail __attribute__((section(AREG_SECTION))) = 0;
-void *CRegTail __attribute__((section(CREG_SECTION))) = 0;
-void *GRegTail __attribute__((section(GREG_SECTION))) = 0;
-void *MRegTail __attribute__((section(MREG_SECTION))) = 0;
-void *YRegTail __attribute__((section(YREG_SECTION))) = 0;
+#include "doomtype.h"
+
+void *ARegTail __attribute__((section(SECTION_AREG))) = 0;
+void *CRegTail __attribute__((section(SECTION_CREG))) = 0;
+void *GRegTail __attribute__((section(SECTION_GREG))) = 0;
+void *MRegTail __attribute__((section(SECTION_MREG))) = 0;
+void *YRegTail __attribute__((section(SECTION_YREG))) = 0;

 #else

--- a/src/compatibility.h
+++ b/src/compatibility.h
@ -9,6 +9,7 @@ union FMD5Holder
 {
 	BYTE Bytes[16];
 	DWORD DWords[4];
+	hash_t Hash;
 };

 struct FCompatValues
@ -21,7 +22,7 @@ struct FMD5HashTraits
 {
 	hash_t Hash(const FMD5Holder key)
 	{
-		return *(hash_t *)key.Bytes;
+		return key.Hash;
 	}
 	int Compare(const FMD5Holder left, const FMD5Holder right)
 	{
--- a/src/dobject.h
+++ b/src/dobject.h
@ -36,9 +36,6 @@

 #include <stdlib.h>
 #include "doomtype.h"
-#ifndef _MSC_VER
-#include "autosegs.h"
-#endif

 struct PClass;

@ -146,7 +143,7 @@ struct ClassReg
 	const size_t *Pointers;
 	void (*ConstructNative)(void *);

-	void RegisterClass();
+	void RegisterClass() const;
 };

 enum EInPlace { EC_InPlace };
@ -177,7 +174,7 @@ private: \
 #	pragma data_seg()
 #	define _DECLARE_TI(cls) __declspec(allocate(".creg$u")) ClassReg *cls::RegistrationInfoPtr = &cls::RegistrationInfo;
 #else
-#	define _DECLARE_TI(cls) ClassReg *cls::RegistrationInfoPtr __attribute__((section(CREG_SECTION))) = &cls::RegistrationInfo;
+#	define _DECLARE_TI(cls) ClassReg *cls::RegistrationInfoPtr __attribute__((section(SECTION_CREG))) = &cls::RegistrationInfo;
 #endif

 #define _IMP_PCLASS(cls,ptrs,create) \
@ -323,7 +320,17 @@ namespace GC
 	// Unroots an object.
 	void DelSoftRoot(DObject *obj);

-	template<class T> void Mark(T *&obj) { Mark((DObject **)&obj); }
+	template<class T> void Mark(T *&obj)
+	{
+		union
+		{
+			T *t;
+			DObject *o;
+		};
+		o = obj;
+		Mark(&o);
+		obj = t;
+	}
 	template<class T> void Mark(TObjPtr<T> &obj);
 }

@ -334,6 +341,7 @@ template<class T>
 class TObjPtr
 {
 	T *p;
+	DObject *o;		// For GC::Mark below to make GCC's strict aliasing happy
 public:
 	TObjPtr() throw()
 	{
@ -398,6 +406,7 @@ public:
 	}

 	template<class U> friend inline FArchive &operator<<(FArchive &arc, TObjPtr<U> &o);
+	template<class U> friend inline void GC::Mark(TObjPtr<U> &obj);
 	friend class DObject;
 };

@ -413,7 +422,10 @@ template<class T,class U> inline T barrier_cast(TObjPtr<U> &o)
 	return static_cast<T>(static_cast<U *>(o));
 }

-template<class T> void GC::Mark(TObjPtr<T> &obj) { GC::Mark((DObject **)&obj); }
+template<class T> inline void GC::Mark(TObjPtr<T> &obj)
+{
+	GC::Mark(&obj.o);
+}

 class DObject
 {
--- a/src/dobjgc.cpp
+++ b/src/dobjgc.cpp
@ -270,7 +270,7 @@ void Mark(DObject **obj)
 	{
 		if (lobj->ObjectFlags & OF_EuthanizeMe)
 		{
-			*obj = NULL;
+			*obj = (DObject *)NULL;
 		}
 		else if (lobj->IsWhite())
 		{
--- a/src/dobjtype.cpp
+++ b/src/dobjtype.cpp
@ -71,11 +71,11 @@ void PClass::StaticInit ()
 	}
 	qsort (head + 1, tail - head - 1, sizeof(REGINFO), cregcmp);

-	TAutoSegIterator<ClassReg *, &CRegHead, &CRegTail> probe;
+	FAutoSegIterator probe(CRegHead, CRegTail);

-	while (++probe != NULL)
+	while (*++probe != NULL)
 	{
-		probe->RegisterClass ();
+		((ClassReg *)*probe)->RegisterClass ();
 	}
 }

@ -153,7 +153,7 @@ void PClass::StaticFreeData (PClass *type)
 	}
 }

-void ClassReg::RegisterClass ()
+void ClassReg::RegisterClass () const
 {
 	assert (MyClass != NULL);

--- a/src/doomtype.h
+++ b/src/doomtype.h
@ -155,9 +155,9 @@ enum
 struct PalEntry
 {
 	PalEntry () {}
-	PalEntry (DWORD argb) { *(DWORD *)this = argb; }
-	operator DWORD () const { return *(DWORD *)this; }
-	PalEntry &operator= (DWORD other) { *(DWORD *)this = other; return *this; }
+	PalEntry (DWORD argb) { d = argb; }
+	operator DWORD () const { return d; }
+	PalEntry &operator= (DWORD other) { d = other; return *this; }
 	PalEntry InverseColor() const { PalEntry nc; nc.a = a; nc.r = 255 - r; nc.g = 255 - g; nc.b = 255 - b; return nc; }
 #ifdef WORDS_BIGENDIAN
 	PalEntry (BYTE ir, BYTE ig, BYTE ib) : a(0), r(ir), g(ig), b(ib) {}
@ -166,7 +166,14 @@ struct PalEntry
 #else
 	PalEntry (BYTE ir, BYTE ig, BYTE ib) : b(ib), g(ig), r(ir), a(0) {}
 	PalEntry (BYTE ia, BYTE ir, BYTE ig, BYTE ib) : b(ib), g(ig), r(ir), a(ia) {}
-	BYTE b,g,r,a;
+	union
+	{
+		struct
+		{
+			BYTE b,g,r,a;
+		};
+		DWORD d;
+	};
 #endif
 };

@ -187,4 +194,20 @@ char ( &_ArraySizeHelper( T (&array)[N] ))[N];

 #define countof( array ) (sizeof( _ArraySizeHelper( array ) ))

+// Auto-registration sections for GCC.
+// Apparently, you cannot do string concatenation inside section attributes.
+#ifdef __MACH__
+#define SECTION_AREG "__DATA,areg"
+#define SECTION_CREG "__DATA,creg"
+#define SECTION_GREG "__DATA,greg"
+#define SECTION_MREG "__DATA,mreg"
+#define SECTION_YREG "__DATA,yreg"
+#else
+#define SECTION_AREG "areg"
+#define SECTION_CREG "creg"
+#define SECTION_GREG "greg"
+#define SECTION_MREG "mreg"
+#define SECTION_YREG "yreg"
+#endif
+
 #endif
--- a/src/f_finale.cpp
+++ b/src/f_finale.cpp
@ -150,7 +150,7 @@ void F_StartFinale (const char *music, int musicorder, int cdtrack, unsigned int

 	if (ending)
 	{
-		FinaleSequence = *((WORD *)&level.nextmap[6]);
+		FinaleSequence = level.EndSequence;
 		if (EndSequences[FinaleSequence].EndType == END_Chess)
 		{
 			TEXTSPEED = 3;	// Slow the text to its original rate to match the music.
@ -244,7 +244,7 @@ void F_Ticker ()
 					// [RH] Don't automatically advance end-of-game messages
 					if (interrupt)
 					{
-						FinaleSequence = *((WORD *)&level.nextmap[6]);
+						FinaleSequence = level.EndSequence;
 						if (EndSequences[FinaleSequence].EndType == END_Cast)
 						{
 							F_StartCast ();
--- a/src/farchive.cpp
+++ b/src/farchive.cpp
@ -92,8 +92,10 @@ static inline DWORD SWAP_DWORD(DWORD x)		{ return _byteswap_ulong(x); }
 static inline QWORD SWAP_QWORD(QWORD x)		{ return _byteswap_uint64(x); }
 static inline void SWAP_DOUBLE(double &dst, double &src)
 {
-	union twiddle { QWORD q; double d; } *tdst = (twiddle *)&dst, *tsrc = (twiddle *)&src;
-	tdst->q = _byteswap_uint64(tsrc->q);
+	union twiddle { QWORD q; double d; } tdst, tsrc;
+	tsrc.d = src;
+	tdst.q = _byteswap_uint64(tsrc.q);
+	dst = tdst.d;
 }
 #else
 static inline WORD  SWAP_WORD(WORD x)		{ return (((x)<<8) | ((x)>>8)); }
@ -108,17 +110,22 @@ static inline QWORD SWAP_QWORD(QWORD x)
 }
 static inline void SWAP_DOUBLE(double &dst, double &src)
 {
-	union twiddle { double f; DWORD d[2]; } *tdst = (twiddle *)&dst, *tsrc = (twiddle *)&src;
+	union twiddle { double f; DWORD d[2]; } tdst, tsrc;
 	DWORD t;
-	t = tsrc->d[0];
-	tdst->d[0] = SWAP_DWORD(tsrc->d[1]);
-	tdst->d[1] = SWAP_DWORD(t);
+
+	tsrc.f = src;
+	t = tsrc.d[0];
+	tdst.d[0] = SWAP_DWORD(tsrc.d[1]);
+	tdst.d[1] = SWAP_DWORD(t);
+	dst = tdst.f;
 }
 #endif
 static inline void SWAP_FLOAT(float &x)
 {
-	union twiddle { DWORD i; float f; } *t = (twiddle *)&x;
-	t->i = SWAP_DWORD(t->i);
+	union twiddle { DWORD i; float f; } t;
+	t.f = x;
+	t.i = SWAP_DWORD(t.i);
+	x = t.f;
 }
 #endif

@ -1278,11 +1285,11 @@ int FArchive::ReadSprite ()
 		Read (&name, 4);
 		hint = ReadCount ();

-		if (hint >= NumStdSprites || *(DWORD *)&sprites[hint].name != name)
+		if (hint >= NumStdSprites || sprites[hint].dwName != name)
 		{
 			for (hint = NumStdSprites; hint-- != 0; )
 			{
-				if (*(DWORD *)&sprites[hint].name == name)
+				if (sprites[hint].dwName == name)
 				{
 					break;
 				}
--- a/src/g_level.h
+++ b/src/g_level.h
@ -36,7 +36,7 @@

 #include "doomtype.h"
 #include "doomdef.h"
-#include "autosegs.h"
+//#include "autosegs.h"
 #include "sc_man.h"

 struct level_info_t;
@ -51,7 +51,7 @@ class FScanner;
 #define GCC_YSEG
 #else
 #define MSVC_YSEG
-#define GCC_YSEG __attribute__((section(YREG_SECTION)))
+#define GCC_YSEG __attribute__((section(SECTION_YREG)))
 #endif


@ -355,7 +355,18 @@ struct FLevelLocals
 	int			levelnum;
 	int			lumpnum;
 	FString		LevelName;
-	char		mapname[256];			// the server name (base1, etc)
+	union
+	{
+		char		mapname[256];		// the server name (base1, etc)
+		// The endsequence is embedded in the name so that it can be
+		// carried around as a name. The first 6 character ought to
+		// match the string "enDSeQ".
+		struct
+		{
+			char	pad[6];
+			WORD	EndSequence;
+		};
+	};
 	char		nextmap[9];				// go here when fraglimit is hit
 	char		secretmap[9];			// map to go to when used secret exit

--- a/src/g_mapinfo.cpp
+++ b/src/g_mapinfo.cpp
@ -50,6 +50,7 @@
 #include "p_acs.h"
 #include "doomstat.h"
 #include "d_player.h"
+#include "autosegs.h"

 int FindEndSequence (int type, const char *picname);

@ -1434,14 +1435,14 @@ void FMapInfoParser::ParseMapDefinition(level_info_t &info)
 		}
 		else
 		{
-			TAutoSegIterator<FMapOptInfo*, &YRegHead, &YRegTail> probe;
+			FAutoSegIterator probe(YRegHead, YRegTail);
 			bool success = false;

-			while (++probe != NULL)
+			while (*++probe != NULL)
 			{
-				if (sc.Compare(probe->name))
+				if (sc.Compare(((FMapOptInfo *)(*probe))->name))
 				{
-					probe->handler(*this, &info);
+					((FMapOptInfo *)(*probe))->handler(*this, &info);
 					success = true;
 					break;
 				}
--- a/src/g_shared/sbarinfo.h
+++ b/src/g_shared/sbarinfo.h
@ -55,9 +55,6 @@ class FScanner;
 class SBarInfoCoordinate
 {
 	public:
-		SBarInfoCoordinate() {}
-		SBarInfoCoordinate(int coord, bool relCenter);
-
 		SBarInfoCoordinate	&Add(int add);
 		int					Coordinate() const { return value; }
 		bool				RelCenter() const { return relCenter; }
@ -132,8 +129,16 @@ struct SBarInfoCommand

 	int type;
 	int special;
-	int special2;
-	int special3;
+	union
+	{
+		int special2;
+		SBarInfoCoordinate sbcoord2;
+	};
+	union
+	{
+		int special3;
+		SBarInfoCoordinate sbcoord3;
+	};
 	int special4;
 	int flags;
 	SBarInfoCoordinate x;
--- a/src/g_shared/sbarinfo_display.cpp
+++ b/src/g_shared/sbarinfo_display.cpp
@ -91,11 +91,6 @@ enum

 ////////////////////////////////////////////////////////////////////////////////

-SBarInfoCoordinate::SBarInfoCoordinate(int coord, bool relCenter) :
-	 relCenter(relCenter), value(coord)
-{
-}
-
 SBarInfoCoordinate &SBarInfoCoordinate::Add(int add)
 {
 	value += add;
@ -756,7 +751,7 @@ void DSBarInfo::doCommands(SBarInfoBlock &block, int xOffset, int yOffset, int a
 						{
 							drawingFont = cmd.font;
 						}
-						DrawNumber(CPlayer->mo->InvSel->Amount, 3, *(SBarInfoCoordinate*)&cmd.special2, *(SBarInfoCoordinate*)&cmd.special3, xOffset, yOffset, alpha, block.fullScreenOffsets, cmd.translation, cmd.special4, false, !!(cmd.flags & DRAWSELECTEDINVENTORY_DRAWSHADOW));
+						DrawNumber(CPlayer->mo->InvSel->Amount, 3, cmd.sbcoord2, cmd.sbcoord3, xOffset, yOffset, alpha, block.fullScreenOffsets, cmd.translation, cmd.special4, false, !!(cmd.flags & DRAWSELECTEDINVENTORY_DRAWSHADOW));
 					}
 				}
 				else if((cmd.flags & DRAWSELECTEDINVENTORY_ALTERNATEONEMPTY))
@ -785,7 +780,7 @@ void DSBarInfo::doCommands(SBarInfoBlock &block, int xOffset, int yOffset, int a
 				{
 					drawingFont = cmd.font;
 				}
-				DrawInventoryBar(cmd.special, cmd.value, cmd.x, cmd.y, xOffset, yOffset, alpha, block.fullScreenOffsets, alwaysshow, *(SBarInfoCoordinate*)&cmd.special2, *(SBarInfoCoordinate*)&cmd.special3, cmd.translation, artibox, noarrows, alwaysshowcounter, bgalpha);
+				DrawInventoryBar(cmd.special, cmd.value, cmd.x, cmd.y, xOffset, yOffset, alpha, block.fullScreenOffsets, alwaysshow, cmd.sbcoord2, cmd.sbcoord3, cmd.translation, artibox, noarrows, alwaysshowcounter, bgalpha);
 				break;
 			}
 			case SBARINFO_DRAWBAR:
--- a/src/g_shared/sbarinfo_parser.cpp
+++ b/src/g_shared/sbarinfo_parser.cpp
@ -765,12 +765,12 @@ void SBarInfo::ParseSBarInfoBlock(FScanner &sc, SBarInfoBlock &block)
 						sc.MustGetToken(',');
 				}
 				this->getCoordinates(sc, block.fullScreenOffsets, cmd.x, cmd.y);
-				*(SBarInfoCoordinate*)&cmd.special2 = cmd.x + 30;
-				*(SBarInfoCoordinate*)&cmd.special3 = cmd.y + 24;
+				cmd.sbcoord2 = cmd.x + 30;
+				cmd.sbcoord3 = cmd.y + 24;
 				cmd.translation = CR_GOLD;
 				if(sc.CheckToken(',')) //more font information
 				{
-					this->getCoordinates(sc, block.fullScreenOffsets, *(SBarInfoCoordinate*)&cmd.special2, *(SBarInfoCoordinate*)&cmd.special3);
+					this->getCoordinates(sc, block.fullScreenOffsets, cmd.sbcoord2, cmd.sbcoord3);
 					if(sc.CheckToken(','))
 					{
 						sc.MustGetToken(TK_Identifier);
@ -847,12 +847,12 @@ void SBarInfo::ParseSBarInfoBlock(FScanner &sc, SBarInfoBlock &block)

 				sc.MustGetToken(',');
 				this->getCoordinates(sc, block.fullScreenOffsets, cmd.x, cmd.y);
-				*(SBarInfoCoordinate*)&cmd.special2 = cmd.x + 26;
-				*(SBarInfoCoordinate*)&cmd.special3 = cmd.y + 22;
+				cmd.sbcoord2 = cmd.x + 26;
+				cmd.sbcoord3 = cmd.y + 22;
 				cmd.translation = CR_GOLD;
 				if(sc.CheckToken(',')) //more font information
 				{
-					this->getCoordinates(sc, block.fullScreenOffsets, *(SBarInfoCoordinate*)&cmd.special2, *(SBarInfoCoordinate*)&cmd.special3);
+					this->getCoordinates(sc, block.fullScreenOffsets, cmd.sbcoord2, cmd.sbcoord3);
 					if(sc.CheckToken(','))
 					{
 						sc.MustGetToken(TK_Identifier);
--- a/src/m_menu.cpp
+++ b/src/m_menu.cpp
@ -3152,6 +3152,9 @@ void M_ButtonHandler(EMenuKey key, bool repeat)
 			PlayerRotation ^= 8;
 		}
 		break;
+
+	default:
+		break;		// Keep GCC quiet
 	}
 }

@ -3204,6 +3207,9 @@ static void M_SaveLoadButtonHandler(EMenuKey key)
 			M_SaveSelect (SelSaveGame);
 		}
 		break;
+
+	default:
+		break;		// Keep GCC quiet
 	}
 }

--- a/src/m_options.cpp
+++ b/src/m_options.cpp
@ -2169,6 +2169,9 @@ void M_OptButtonHandler(EMenuKey key, bool repeat)

 	switch (key)
 	{
+	default:
+		break;		// Keep GCC quiet
+
 	case MKEY_Down:
 		if (CurrentMenu->numitems > 1)
 		{
@ -3289,7 +3292,7 @@ void UpdateJoystickMenu(IJoystickConfig *selected)
 			break;
 		}
 	}
-	if (i == Joysticks.Size())
+	if (i == (int)Joysticks.Size())
 	{
 		SELECTED_JOYSTICK = NULL;
 		if (CurrentMenu == &JoystickConfigMenu)
--- a/src/mus2midi.cpp
+++ b/src/mus2midi.cpp
@ -41,6 +41,7 @@

 #include "m_swap.h"
 #include "mus2midi.h"
+#include "doomdef.h"

 static const BYTE StaticMIDIhead[] =
 { 'M','T','h','d', 0, 0, 0, 6,
@ -52,7 +53,7 @@ static const BYTE StaticMIDIhead[] =
 0, 255, 81, 3, 0x07, 0xa1, 0x20
 };

-static const BYTE MUSMagic[4] = { 'M','U','S',0x1a };
+static const DWORD MUSMagic = MAKE_ID('M','U','S',0x1a);

 static const BYTE CtrlTranslate[15] =
 {
@ -122,7 +123,7 @@ bool ProduceMIDI (const BYTE *musBuf, TArray<BYTE> &outFile)
 	long trackLen;
 	
 	// Do some validation of the MUS file
-	if (*(DWORD *)MUSMagic != musHead->Magic)
+	if (MUSMagic != musHead->Magic)
 		return false;
 	
 	if (LittleShort(musHead->NumChans) > 15)
--- a/src/r_defs.h
+++ b/src/r_defs.h
@ -1070,7 +1070,11 @@ struct spriteframe_t
 //
 struct spritedef_t
 {
-	char name[5];
+	union
+	{
+		char name[5];
+		DWORD dwName;
+	};
 	BYTE numframes;
 	WORD spriteframes;
 };
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@ -345,9 +345,9 @@ void R_InitSpriteDefs ()
 	for (i = 0; i < max; ++i)
 	{
 		FTexture *tex = TexMan.ByIndex(i);
-		if (tex->UseType == FTexture::TEX_Sprite && strlen (tex->Name) >= 6)
+		if (tex->UseType == FTexture::TEX_Sprite && strlen(tex->Name) >= 6)
 		{
-			DWORD bucket = *(DWORD *)tex->Name % max;
+			DWORD bucket = tex->dwName % max;
 			hashes[i].Next = hashes[bucket].Head;
 			hashes[bucket].Head = i;
 		}
@ -363,14 +363,14 @@ void R_InitSpriteDefs ()
 		}
 				
 		maxframe = -1;
-		intname = *(DWORD *)sprites[i].name;
+		intname = sprites[i].dwName;

 		// scan the lumps, filling in the frames for whatever is found
 		int hash = hashes[intname % max].Head;
 		while (hash != -1)
 		{
 			FTexture *tex = TexMan[hash];
-			if (*(DWORD *)tex->Name == intname)
+			if (tex->dwName == intname)
 			{
 				R_InstallSpriteLump (FTextureID(hash), tex->Name[4] - 'A', tex->Name[5], false);

@ -673,7 +673,7 @@ void R_InitSkins (void)
 			{
 				char name[9];
 				Wads.GetLumpName (name, base+1);
-				intname = *(DWORD *)name;
+				memcpy(&intname, name, 4);
 			}

 			int basens = Wads.GetLumpNamespace(base);
@ -703,8 +703,10 @@ void R_InitSkins (void)
 				for (k = base + 1; Wads.GetLumpNamespace(k) == basens; k++)
 				{
 					char lname[9];
+					DWORD lnameint;
 					Wads.GetLumpName (lname, k);
-					if (*(DWORD *)lname == intname)
+					memcpy(&lnameint, lname, 4);
+					if (lnameint == intname)
 					{
 						FTextureID picnum = TexMan.CreateTexture(k, FTexture::TEX_SkinSprite);
 						R_InstallSpriteLump (picnum, lname[4] - 'A', lname[5], false);
--- a/src/resourcefiles/resourcefile.h
+++ b/src/resourcefiles/resourcefile.h
@ -13,7 +13,13 @@ struct FResourceLump

 	int				LumpSize;
 	char *			FullName;		// only valid for files loaded from a .zip file
-	char			Name[9];
+	union
+	{
+		char		Name[9];
+
+		DWORD		dwName;			// These are for accessing the first 4 or 8 chars of
+		QWORD		qwName;			// Name as a unit without breaking strict aliasing rules
+	};
 	BYTE			Flags;
 	SBYTE			RefCount;
 	char *			Cache;
--- a/src/textures/textures.h
+++ b/src/textures/textures.h
@ -101,7 +101,11 @@ public:

 	int SourceLump;

-	char Name[9];
+	union
+	{
+		char Name[9];
+		DWORD dwName;		// Used with sprites
+	};
 	BYTE UseType;	// This texture's primary purpose

 	BYTE bNoDecals:1;		// Decals should not stick to texture
--- a/src/thingdef/thingdef.h
+++ b/src/thingdef/thingdef.h
@ -175,8 +175,7 @@ struct AFuncDesc
 	actionf_p Function;
 };

-AFuncDesc * FindFunction(const char * string);
-
+AFuncDesc *FindFunction(const char * string);


 void ParseStates(FScanner &sc, FActorInfo *actor, AActor *defaults, Baggage &bag);
@ -250,11 +249,11 @@ enum EDefinitionType
 #define GCC_MSEG
 #else
 #define MSVC_ASEG
-#define GCC_ASEG __attribute__((section(AREG_SECTION)))
+#define GCC_ASEG __attribute__((section(SECTION_AREG)))
 #define MSVC_PSEG
-#define GCC_PSEG __attribute__((section(GREG_SECTION)))
+#define GCC_PSEG __attribute__((section(SECTION_GREG)))
 #define MSVC_MSEG
-#define GCC_MSEG __attribute__((section(MREG_SECTION)))
+#define GCC_MSEG __attribute__((section(SECTION_MREG)))
 #endif


--- a/src/thingdef/thingdef_data.cpp
+++ b/src/thingdef/thingdef_data.cpp
@ -417,7 +417,7 @@ FPropertyInfo *FindProperty(const char * string)
 //
 //==========================================================================

-AFuncDesc * FindFunction(const char * string)
+AFuncDesc *FindFunction(const char * string)
 {
 	int min = 0, max = AFTable.Size()-1;

@ -444,7 +444,7 @@ AFuncDesc * FindFunction(const char * string)

 //==========================================================================
 //
-// Find a varIABLE by name using a binary search
+// Find a variable by name using a binary search
 //
 //==========================================================================

@ -541,11 +541,11 @@ void InitThingdef()

 	// Create a sorted list of properties
 	{
-		TAutoSegIterator<FPropertyInfo *, &GRegHead, &GRegTail> probe;
+		FAutoSegIterator probe(GRegHead, GRegTail);

-		while (++probe != NULL)
+		while (*++probe != NULL)
 		{
-			properties.Push(probe);
+			properties.Push((FPropertyInfo *)*probe);
 		}
 		properties.ShrinkToFit();
 		qsort(&properties[0], properties.Size(), sizeof(properties[0]), propcmp);
@ -553,11 +553,11 @@ void InitThingdef()

 	// Create a sorted list of native action functions
 	{
-		TAutoSegIterator<AFuncDesc *, &ARegHead, &ARegTail> probe;
+		FAutoSegIterator probe(ARegHead, ARegTail);

-		while (++probe != NULL)
+		while (*++probe != NULL)
 		{
-			AFTable.Push(*probe);
+			AFTable.Push(*(AFuncDesc *)*probe);
 		}
 		AFTable.ShrinkToFit();
 		qsort(&AFTable[0], AFTable.Size(), sizeof(AFTable[0]), funccmp);
@ -565,11 +565,11 @@ void InitThingdef()

 	// Create a sorted list of native variables
 	{
-		TAutoSegIterator<FVariableInfo *, &MRegHead, &MRegTail> probe;
+		FAutoSegIterator probe(MRegHead, MRegTail);

-		while (++probe != NULL)
+		while (*++probe != NULL)
 		{
-			variables.Push(probe);
+			variables.Push((FVariableInfo *)*probe);
 		}
 		variables.ShrinkToFit();
 		qsort(&variables[0], variables.Size(), sizeof(variables[0]), varcmp);
--- a/src/thingdef/thingdef_expression.cpp
+++ b/src/thingdef/thingdef_expression.cpp
@ -49,7 +49,6 @@
 #include "p_lnspec.h"
 #include "doomstat.h"
 #include "thingdef_exp.h"
-#include "autosegs.h"

 int testglobalvar = 1337;	// just for having one global variable to test with
 DEFINE_GLOBAL_VARIABLE(testglobalvar)
--- a/src/thingdef/thingdef_parse.cpp
+++ b/src/thingdef/thingdef_parse.cpp
@ -48,7 +48,6 @@
 #include "templates.h"
 #include "v_palette.h"
 #include "doomerrors.h"
-#include "autosegs.h"
 #include "i_system.h"
 #include "thingdef_exp.h"
 #include "w_wad.h"
@ -311,7 +310,7 @@ static void ParseVariable (FScanner &sc, PSymbolTable * symt, PClass *cls)
 	}
 	sc.MustGetToken(';');

-	FVariableInfo *vi = FindVariable(symname, cls);
+	const FVariableInfo *vi = FindVariable(symname, cls);
 	if (vi == NULL)
 	{
 		sc.ScriptError("Unknown native variable '%s'", symname.GetChars());
@ -746,7 +745,7 @@ static void ParseActionDef (FScanner &sc, PClass *cls)
 	};

 	bool error = false;
-	AFuncDesc *afd;
+	const AFuncDesc *afd;
 	FName funcname;
 	FString args;
 	TArray<FxExpression *> DefaultParams;
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@ -67,7 +67,6 @@
 #include "r_translate.h"
 #include "a_morph.h"
 #include "colormatcher.h"
-#include "autosegs.h"


 //==========================================================================
--- a/src/thingdef/thingdef_states.cpp
+++ b/src/thingdef/thingdef_states.cpp
@ -39,7 +39,6 @@
 */

 #include "actor.h"
-#include "autosegs.h"
 #include "info.h"
 #include "sc_man.h"
 #include "tarray.h"
--- a/src/w_wad.cpp
+++ b/src/w_wad.cpp
@ -369,7 +369,11 @@ int FWadCollection::GetNumWads () const

 int FWadCollection::CheckNumForName (const char *name, int space)
 {
-	char uname[8];
+	union
+	{
+		char uname[8];
+		QWORD qname;
+	};
 	DWORD i;

 	if (name == NULL)
@ -391,7 +395,7 @@ int FWadCollection::CheckNumForName (const char *name, int space)
 	{
 		FResourceLump *lump = LumpInfo[i].lump;

-		if (*(QWORD *)&lump->Name == *(QWORD *)&uname)
+		if (lump->qwName == qname)
 		{
 			if (lump->Namespace == space) break;
 			// If the lump is from one of the special namespaces exclusive to Zips
@ -411,7 +415,11 @@ int FWadCollection::CheckNumForName (const char *name, int space)
 int FWadCollection::CheckNumForName (const char *name, int space, int wadnum, bool exact)
 {
 	FResourceLump *lump;
-	char uname[8];
+	union
+	{
+		char uname[8];
+		QWORD qname;
+	};
 	DWORD i;

 	if (wadnum < 0)
@ -426,7 +434,7 @@ int FWadCollection::CheckNumForName (const char *name, int space, int wadnum, bo
 	// also those in earlier WADs.

 	while (i != NULL_INDEX &&
-		(lump = LumpInfo[i].lump, *(QWORD *)&lump->Name != *(QWORD *)&uname ||
+		(lump = LumpInfo[i].lump, lump->qwName != qname ||
 		lump->Namespace != space ||
 		 (exact? (LumpInfo[i].wadnum != wadnum) : (LumpInfo[i].wadnum > wadnum)) ))
 	{
@ -738,7 +746,7 @@ void FWadCollection::RenameSprites ()
 		// some frames need to be renamed.
 		if (LumpInfo[i].lump->Namespace == ns_sprites)
 		{
-			if (*(DWORD *)LumpInfo[i].lump->Name == MAKE_ID('M', 'N', 'T', 'R') && LumpInfo[i].lump->Name[4] == 'Z' )
+			if (LumpInfo[i].lump->dwName == MAKE_ID('M', 'N', 'T', 'R') && LumpInfo[i].lump->Name[4] == 'Z' )
 			{
 				MNTRZfound = true;
 				break;
@ -757,9 +765,9 @@ void FWadCollection::RenameSprites ()
 			{
 				for (int j = 0; j < numrenames; ++j)
 				{
-					if (*(DWORD *)LumpInfo[i].lump->Name == renames[j*2])
+					if (LumpInfo[i].lump->dwName == renames[j*2])
 					{
-						*(DWORD *)LumpInfo[i].lump->Name = renames[j*2+1];
+						LumpInfo[i].lump->dwName = renames[j*2+1];
 					}
 				}
 				if (gameinfo.gametype == GAME_Hexen)
@ -774,7 +782,7 @@ void FWadCollection::RenameSprites ()

 			if (!MNTRZfound)
 			{
-				if (*(DWORD *)LumpInfo[i].lump->Name == MAKE_ID('M', 'N', 'T', 'R'))
+				if (LumpInfo[i].lump->dwName == MAKE_ID('M', 'N', 'T', 'R'))
 				{
 					if (LumpInfo[i].lump->Name[4] >= 'F' && LumpInfo[i].lump->Name[4] <= 'K')
 					{
@ -787,9 +795,9 @@ void FWadCollection::RenameSprites ()
 			// the same blood states can be used everywhere
 			if (!(gameinfo.gametype & GAME_DoomChex))
 			{
-				if (*(DWORD *)LumpInfo[i].lump->Name == MAKE_ID('B', 'L', 'O', 'D'))
+				if (LumpInfo[i].lump->dwName == MAKE_ID('B', 'L', 'O', 'D'))
 				{
-					*(DWORD *)LumpInfo[i].lump->Name = MAKE_ID('B', 'L', 'U', 'D');
+					LumpInfo[i].lump->dwName = MAKE_ID('B', 'L', 'U', 'D');
 				}
 			}
 		}
@ -807,7 +815,11 @@ void FWadCollection::RenameSprites ()

 int FWadCollection::FindLump (const char *name, int *lastlump, bool anyns)
 {
-	char name8[8];
+	union
+	{
+		char name8[8];
+		QWORD qname;
+	};
 	LumpRecord *lump_p;

 	uppercopy (name8, name);
@ -817,8 +829,7 @@ int FWadCollection::FindLump (const char *name, int *lastlump, bool anyns)
 	{
 		FResourceLump *lump = lump_p->lump;

-		if ((anyns || lump->Namespace == ns_global) &&
-			*(QWORD *)&lump->Name == *(QWORD *)&name8)
+		if ((anyns || lump->Namespace == ns_global) && lump->qwName == qname)
 		{
 			int lump = int(lump_p - &LumpInfo[0]);
 			*lastlump = lump + 1;
--- a/src/win32/i_crash.cpp
+++ b/src/win32/i_crash.cpp
@ -732,8 +732,10 @@ HANDLE WriteTextReport ()

 		for (i = 0; i < 8; ++i)
 		{
-			Writef (file, "MM%d=%08x%08x\r\n", i, *(DWORD *)(&ctxt->FloatSave.RegisterArea[20*i+4]),
-				*(DWORD *)(&ctxt->FloatSave.RegisterArea[20*i]));
+			DWORD d0, d1;
+			memcpy(&d0, &ctxt->FloatSave.RegisterArea[20*i+4], sizeof(DWORD));
+			memcpy(&d1, &ctxt->FloatSave.RegisterArea[20*i], sizeof(DWORD));
+			Writef (file, "MM%d=%08x%08x\r\n", i, d0, d1);
 		}
 #else
 		for (i = 0; i < 8; ++i)
@ -2115,7 +2117,9 @@ repeat:
 			{
 				if (i <= read - 4)
 				{
-					buff_p += mysnprintf (buff_p, buff_end - buff_p, " %08lx", *(DWORD *)&buf16[i]);
+					DWORD d;
+					memcpy(&d, &buf16[i], sizeof(d));
+					buff_p += mysnprintf (buff_p, buff_end - buff_p, " %08lx", d);
 					i += 4;
 				}
 				else
--- a/src/win32/i_dijoy.cpp
+++ b/src/win32/i_dijoy.cpp
@ -1293,7 +1293,7 @@ bool FDInputJoystickManager::IsXInputDeviceFast(const GUID *guid)
 			cbSize = rdi.cbSize = sizeof(rdi);
 			if (MyGetRawInputDeviceInfoA(devices[i].hDevice, RIDI_DEVICEINFO, &rdi, &cbSize) >= 0)
 			{
-				if(MAKELONG(rdi.hid.dwVendorId, rdi.hid.dwProductId) == guid->Data1)
+				if(MAKELONG(rdi.hid.dwVendorId, rdi.hid.dwProductId) == (LONG)guid->Data1)
 				{
 					char name[256];
 					UINT namelen = countof(name);
--- a/src/x86.cpp
+++ b/src/x86.cpp
@ -73,9 +73,9 @@ haveid:

 	// Get vendor ID
 	__cpuid(foo, 0);
-	((int *)cpu->VendorID)[0] = foo[1];
-	((int *)cpu->VendorID)[1] = foo[3];
-	((int *)cpu->VendorID)[2] = foo[2];
+	cpu->VendorID[0] = foo[1];
+	cpu->VendorID[1] = foo[3];
+	cpu->VendorID[2] = foo[2];
 	if (foo[1] == MAKE_ID('A','u','t','h') &&
 		foo[3] == MAKE_ID('e','n','t','i') &&
 		foo[2] == MAKE_ID('c','A','M','D'))
@ -85,9 +85,9 @@ haveid:

 	// Get features flags and other info
 	__cpuid(foo, 1);
-	((int *)cpu)[17] = foo[1];	// Store brand index and other stuff
-	((int *)cpu)[18] = foo[2];	// Store extended feature flags
-	((int *)cpu)[19] = foo[3];	// Store feature flags
+	cpu->FeatureFlags[0] = foo[1];	// Store brand index and other stuff
+	cpu->FeatureFlags[1] = foo[2];	// Store extended feature flags
+	cpu->FeatureFlags[2] = foo[3];	// Store feature flags

 	// If CLFLUSH instruction is supported, get the real cache line size.
 	if (foo[3] & (1 << 19))
@ -115,9 +115,9 @@ haveid:

 	if (maxext >= 0x80000004)
 	{ // Get processor brand string.
-		__cpuid((int *)&cpu->CPUString[0],  0x80000002);
-		__cpuid((int *)&cpu->CPUString[16], 0x80000003);
-		__cpuid((int *)&cpu->CPUString[32], 0x80000004);
+		__cpuid((int *)&cpu->dwCPUString[0], 0x80000002);
+		__cpuid((int *)&cpu->dwCPUString[4], 0x80000003);
+		__cpuid((int *)&cpu->dwCPUString[8], 0x80000004);
 	}

 	if (cpu->bIsAMD)
@ -125,7 +125,7 @@ haveid:
 		if (maxext >= 0x80000005)
 		{ // Get data L1 cache info.
 			__cpuid(foo, 0x80000005);
-			*(int *)(&cpu->DataL1LineSize) = foo[2];
+			cpu->AMD_DataL1Info = foo[2];
 		}
 		if (maxext >= 0x80000001)
 		{ // Get AMD-specific feature flags.
--- a/src/x86.h
+++ b/src/x86.h
@ -5,26 +5,41 @@

 struct CPUInfo	// 92 bytes
 {
-	char VendorID[16];
-	char CPUString[48];
+	union
+	{
+		char VendorID[16];
+		DWORD dwVendorID[4];
+	};
+	union
+	{
+		char CPUString[48];
+		DWORD dwCPUString[12];
+	};

-	BYTE Stepping;
-	BYTE Model;
-	BYTE Family;
-	BYTE Type;
+	union
+	{
+		struct
+		{
+			BYTE Stepping;
+			BYTE Model;
+			BYTE Family;
+			BYTE Type;

-	BYTE BrandIndex;
-	BYTE CLFlush;
-	BYTE CPUCount;
-	BYTE APICID;
+			BYTE BrandIndex;
+			BYTE CLFlush;
+			BYTE CPUCount;
+			BYTE APICID;

-	DWORD bSSE3:1;
-	DWORD DontCare1:8;
-	DWORD bSSSE3:1;
-	DWORD DontCare1a:9;
-	DWORD bSSE41:1;
-	DWORD bSSE42:1;
-	DWORD DontCare2a:11;
+			DWORD bSSE3:1;
+			DWORD DontCare1:8;
+			DWORD bSSSE3:1;
+			DWORD DontCare1a:9;
+			DWORD bSSE41:1;
+			DWORD bSSE42:1;
+			DWORD DontCare2a:11;
+		};
+		DWORD FeatureFlags[3];
+	};

 	DWORD bFPU:1;
 	DWORD bVME:1;
@ -71,10 +86,17 @@ struct CPUInfo	// 92 bytes
 	BYTE AMDFamily;
 	BYTE bIsAMD;

-	BYTE DataL1LineSize;
-	BYTE DataL1LinesPerTag;
-	BYTE DataL1Associativity;
-	BYTE DataL1SizeKB;
+	union
+	{
+		struct
+		{
+			BYTE DataL1LineSize;
+			BYTE DataL1LinesPerTag;
+			BYTE DataL1Associativity;
+			BYTE DataL1SizeKB;
+		};
+		DWORD AMD_DataL1Info;
+	};
 };