Update.

2000-06-06  Ulrich Drepper  <drepper@redhat.com>

	* iconvdata/iso-2022-kr.c: Add __builtin_expect in many places.
	* iconvdata/iso-2022-jp.c: Likewise.
	* iconvdata/iso-2022-cn.c: Likewise.
	* iconvdata/gbgbk.c: Likewise.
	* iconvdata/gbk.c: Likewise.
	* iconvdata/euc-kr.c: Likewise.
	* iconvdata/euc-jp.c: Likewise.
	* iconvdata/euc-cn.c: Likewise.

8 files changed, 137 insertions, 109 deletions

diff --git a/iconvdata/euc-cn.c b/iconvdata/euc-cn.c
index 3211b57..b4c1725 100644
--- a/iconvdata/euc-cn.c
+++ b/iconvdata/euc-cn.c
@@ -44,7 +44,8 @@
     if (ch <= 0x7f)							      \
       ++inptr;								      \
     else								      \
-      if ((ch <= 0xa0 && ch != 0x8e && ch != 0x8f) || ch > 0xfe)	      \
+      if ((__builtin_expect (ch, 0xa1) <= 0xa0 && ch != 0x8e && ch != 0x8f)   \
+	  || __builtin_expect (ch, 0xfe) > 0xfe)			      \
 	{								      \
 	  /* This is illegal.  */					      \
 	  if (! ignore_errors_p ())					      \
@@ -63,7 +64,7 @@
 	     next character is also available.  */			      \
 	  const unsigned char *endp;					      \
 									      \
-	  if (NEED_LENGTH_TEST && inptr + 1 >= inend)			      \
+	  if (NEED_LENGTH_TEST && __builtin_expect (inptr + 1 >= inend, 0))   \
 	    {								      \
 	      /* The second character is not available.  Store		      \
 		 the intermediate result.  */				      \
@@ -74,7 +75,7 @@
 	  ch = inptr[1];						      \
 									      \
 	  /* All second bytes of a multibyte character must be >= 0xa1. */    \
-	  if (ch < 0xa1)						      \
+	  if (__builtin_expect (ch, 0xa1) < 0xa1)			      \
 	    {								      \
 	      if (! ignore_errors_p ())					      \
 		{							      \
@@ -92,7 +93,7 @@
 	  endp = inptr;							      \
 									      \
 	  ch = gb2312_to_ucs4 (&endp, 2, 0x80);				      \
-	  if (ch == __UNKNOWN_10646_CHAR)				      \
+	  if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)		      \
 	    {								      \
 	      /* This is an illegal character.  */			      \
 	      if (! ignore_errors_p ())					      \
@@ -135,9 +136,9 @@
 	found = ucs4_to_gb2312 (ch, outptr,				      \
 				(NEED_LENGTH_TEST			      \
 				 ? outend - outptr : MAX_NEEDED_OUTPUT));     \
-	if (!NEED_LENGTH_TEST || found != 0)				      \
+	if (!NEED_LENGTH_TEST || __builtin_expect (found, 1) != 0)	      \
 	  {								      \
-	    if (found == __UNKNOWN_10646_CHAR)				      \
+	    if (__builtin_expect (found, 0) == __UNKNOWN_10646_CHAR)	      \
 	      {								      \
 		/* Illegal character.  */				      \
 		if (! ignore_errors_p ())				      \
diff --git a/iconvdata/euc-jp.c b/iconvdata/euc-jp.c
index 240d760..a781182 100644
--- a/iconvdata/euc-jp.c
+++ b/iconvdata/euc-jp.c
@@ -46,7 +46,8 @@
 									      \
     if (ch <= 0x7f)							      \
       ++inptr;								      \
-    else if ((ch <= 0xa0 && ch != 0x8e && ch != 0x8f) || ch > 0xfe)	      \
+    else if ((__builtin_expect (ch, 0xa1) <= 0xa0 && ch != 0x8e && ch != 0x8f)\
+	     || __builtin_expect (ch, 0xfe) > 0xfe)			      \
       {									      \
 	/* This is illegal.  */						      \
 	if (! ignore_errors_p ())					      \
@@ -65,7 +66,7 @@
 	   character is also available.  */				      \
 	int ch2;							      \
 									      \
-	if (NEED_LENGTH_TEST && inptr + 1 >= inend)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (inptr + 1 >= inend, 0))     \
 	  {								      \
 	    /* The second character is not available.  Store the	      \
 	       intermediate result.  */					      \
@@ -76,7 +77,7 @@
 	ch2 = inptr[1];							      \
 									      \
 	/* All second bytes of a multibyte character must be >= 0xa1. */      \
-	if (ch2 < 0xa1)							      \
+	if (__builtin_expect (ch2, 0xa1) < 0xa1)			      \
 	  {								      \
 	    /* This is an illegal character.  */			      \
 	    if (! ignore_errors_p ())					      \
@@ -119,13 +120,13 @@
 				       0x80);				      \
 	      }								      \
 									      \
-	    if (NEED_LENGTH_TEST && ch == 0)				      \
+	    if (NEED_LENGTH_TEST && __builtin_expect (ch, 1) == 0)	      \
 	      {								      \
 		/* Not enough input available.  */			      \
 		result = __GCONV_INCOMPLETE_INPUT;			      \
 		break;							      \
 	      }								      \
-	    if (ch == __UNKNOWN_10646_CHAR)				      \
+	    if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)	      \
 	      {								      \
 		/* Illegal character.  */				      \
 		if (! ignore_errors_p ())				      \
@@ -173,7 +174,7 @@
 	size_t found;							      \
 									      \
 	/* See whether we have room for at least two characters.  */	      \
-	if (NEED_LENGTH_TEST && outptr + 1 >= outend)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (outptr + 1 >= outend, 0))   \
 	  {								      \
 	    result = __GCONV_FULL_OUTPUT;				      \
 	    break;							      \
@@ -204,13 +205,13 @@
 					  (NEED_LENGTH_TEST		      \
 					   ? outend - outptr - 1 : 2));	      \
 		  							      \
-		if (found == 0)						      \
+		if (__builtin_expect (found, 1) == 0)			      \
 		  {							      \
 		    /* We ran out of space.  */				      \
 		    result = __GCONV_FULL_OUTPUT;			      \
 		    break;						      \
 		  }							      \
-		else if (found != __UNKNOWN_10646_CHAR)			      \
+		else if (__builtin_expect (found, 0) != __UNKNOWN_10646_CHAR) \
 		  {							      \
 		    /* It's a JIS 0212 character, adjust it for EUC-JP.  */   \
 		    *outptr++ = 0x8f;					      \
diff --git a/iconvdata/euc-kr.c b/iconvdata/euc-kr.c
index d84e72c..48fdee3 100644
--- a/iconvdata/euc-kr.c
+++ b/iconvdata/euc-kr.c
@@ -28,7 +28,8 @@ euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
 {
   if (ch > 0x7f)
     {
-      if (ucs4_to_ksc5601 (ch, cp, 2) != __UNKNOWN_10646_CHAR)
+      if (__builtin_expect (ucs4_to_ksc5601 (ch, cp, 2), 0)
+	  != __UNKNOWN_10646_CHAR)
 	{
 	  cp[0] |= 0x80;
 	  cp[1] |= 0x80;
@@ -78,7 +79,9 @@ euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
       ++inptr;								      \
     /* 0xfe(->0x7e : row 94) and 0xc9(->0x59 : row 41) are		      \
        user-defined areas.  */						      \
-    else if (ch <= 0xa0 || ch > 0xfe || ch == 0xc9)			      \
+    else if (__builtin_expect (ch, 0xa1) <= 0xa0			      \
+	     || __builtin_expect (ch, 0xa1) > 0xfe			      \
+	     || __builtin_expect (ch, 0xa1) == 0xc9)			      \
       {									      \
 	/* This is illegal.  */						      \
 	if (! ignore_errors_p ())					      \
@@ -97,13 +100,13 @@ euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
 	   is also available.  */					      \
 	ch = ksc5601_to_ucs4 (&inptr,					      \
 			      NEED_LENGTH_TEST ? inptr - inend : 2, 0x80);    \
-	if (NEED_LENGTH_TEST && ch == 0)				      \
+	if (NEED_LENGTH_TEST && __builtin_expect (ch, 1) == 0)		      \
 	  {								      \
 	    /* The second character is not available.  */		      \
 	    result = __GCONV_INCOMPLETE_INPUT;				      \
 	    break;							      \
 	  }								      \
-	if (ch == __UNKNOWN_10646_CHAR)					      \
+	if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)		      \
 	  {								      \
 	    /* This is an illegal character.  */			      \
 	    if (! ignore_errors_p ())					      \
@@ -139,7 +142,7 @@ euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
        Jamos should be considered either here or in euckr_from_ucs4() */      \
     euckr_from_ucs4 (ch, cp) ;						      \
 									      \
-    if (cp[0] == '\0' && ch != 0)					      \
+    if (__builtin_expect (cp[0], '\1') == '\0' && ch != 0)		      \
       {									      \
 	/* Illegal character.  */					      \
 	if (! ignore_errors_p ())					      \
@@ -157,7 +160,7 @@ euckr_from_ucs4 (uint32_t ch, unsigned char *cp)
     /* Now test for a possible second byte and write this if possible.  */    \
     if (cp[1] != '\0')							      \
       {									      \
-	if (NEED_LENGTH_TEST && outptr >= outend)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (outptr >= outend, 0))	      \
 	  {								      \
 	    /* The result does not fit into the buffer.  */		      \
 	    --outptr;							      \
diff --git a/iconvdata/gbgbk.c b/iconvdata/gbgbk.c
index 88617ae..9a3e385 100644
--- a/iconvdata/gbgbk.c
+++ b/iconvdata/gbgbk.c
@@ -71,7 +71,7 @@
 		UCS4 -> GB2312 -> GBK -> UCS4				      \
 									      \
 	   might not produce identical text.  */			      \
-	if (NEED_LENGTH_TEST && inptr + 1 >= inend)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (inptr + 1 >= inend, 0))     \
 	  {								      \
 	    /* The second character is not available.  Store		      \
 	       the intermediate result.  */				      \
@@ -79,7 +79,7 @@
 	    break;							      \
 	  }								      \
 									      \
-	if (NEED_LENGTH_TEST && outend - outptr < 2)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (outend - outptr < 2, 0))    \
 	  {								      \
 	    /* We ran out of space.  */					      \
 	    result = __GCONV_FULL_OUTPUT;				      \
@@ -89,11 +89,16 @@
 	ch = (ch << 8) | inptr[1];					      \
 									      \
 	/* Now determine whether the character is valid.  */		      \
-	if (ch < 0xa1a1 || ch > 0xf7fe || inptr[1] < 0xa1		      \
+	if (__builtin_expect (ch, 0xa1a1) < 0xa1a1			      \
+	    || __builtin_expect (ch, 0xa1a1) > 0xf7fe			      \
+	    || __builtin_expect (inptr[1], 0xa1) < 0xa1			      \
 	    /* Now test the exceptions.  */				      \
-	    || (ch >= 0xa2a1 && ch <= 0xa2aa)				      \
-	    || (ch >= 0xa6e0 && ch <= 0xa6f5)				      \
-	    || (ch >= 0xa8bb && ch <= 0xa8c0))				      \
+	    || (__builtin_expect (ch, 0xa1a1) >= 0xa2a1			      \
+		&& __builtin_expect (ch, 0xa1a1) <= 0xa2aa)		      \
+	    || (__builtin_expect (ch, 0xa1a1) >= 0xa6e0			      \
+		&& __builtin_expect (ch, 0xa1a1) <= 0xa6f5)		      \
+	    || (__builtin_expect (ch, 0xa1a1) >= 0xa8bb			      \
+		&& __builtin_expect (ch, 0xa1a1) <= 0xa8c0))		      \
 	  {								      \
 	    /* One of the characters we cannot map.  */			      \
 	    if (! ignore_errors_p ())					      \
@@ -131,7 +136,7 @@
 									      \
     if (ch > 0x7f)							      \
       {									      \
-	if (NEED_LENGTH_TEST && inptr + 1 >= inend)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (inptr + 1 >= inend, 0))     \
 	  {								      \
 	    /* The second character is not available.  Store		      \
 		 the intermediate result.  */				      \
@@ -139,7 +144,7 @@
 	    break;							      \
 	  }								      \
 									      \
-	if (NEED_LENGTH_TEST && outend - outptr < 2)			      \
+	if (NEED_LENGTH_TEST && __builtin_expect (outend - outptr < 2, 0))    \
 	  {								      \
 	    /* We ran out of space.  */					      \
 	    result = __GCONV_FULL_OUTPUT;				      \
diff --git a/iconvdata/gbk.c b/iconvdata/gbk.c
index c120df0..405a3f8 100644
--- a/iconvdata/gbk.c
+++ b/iconvdata/gbk.c
@@ -13121,7 +13121,8 @@ static const char __gbk_from_ucs4_tab12[][2] =
     if (ch <= 0x7f)							      \
       ++inptr;								      \
     else								      \
-      if (ch <= 0x80 || ch > 0xfe)					      \
+      if (__builtin_expect (ch, 0x81) <= 0x80				      \
+	  || __builtin_expect (ch, 0x81) > 0xfe)			      \
 	{								      \
 	  /* This is illegal.  */					      \
 	  if (! ignore_errors_p ())					      \
@@ -13141,7 +13142,7 @@ static const char __gbk_from_ucs4_tab12[][2] =
 	  uint32_t ch2;							      \
 	  int idx;							      \
 									      \
-	  if (NEED_LENGTH_TEST && inptr + 1 >= inend)			      \
+	  if (NEED_LENGTH_TEST && __builtin_expect (inptr + 1 >= inend, 0))   \
 	    {								      \
 	      /* The second character is not available.  Store		      \
 		 the intermediate result.  */				      \
@@ -13152,7 +13153,7 @@ static const char __gbk_from_ucs4_tab12[][2] =
 	  ch2 = inptr[1];						      \
 									      \
 	  /* All second bytes of a multibyte character must be >= 0x40. */    \
-	  if (ch2 < 0x40)						      \
+	  if (__builtin_expect (ch2, 0x41) < 0x40)			      \
 	    {								      \
 	      /* This is an illegal character.  */			      \
 	      if (! ignore_errors_p ())					      \
@@ -13172,7 +13173,7 @@ static const char __gbk_from_ucs4_tab12[][2] =
 									      \
 	  ch = __gbk_to_ucs[idx];					      \
 									      \
-	  if (ch == 0 && *inptr != '\0')				      \
+	  if (__builtin_expect (ch, 1) == 0 && *inptr != '\0')		      \
 	    {								      \
 	      /* This is an illegal character.  */			      \
 	      if (! ignore_errors_p ())					      \
@@ -13446,7 +13447,7 @@ static const char __gbk_from_ucs4_tab12[][2] =
 	  cp = "";							      \
 	  break; 							      \
 	}								      \
-      if (cp == NULL || (cp[0] == '\0' && ch != 0))			      \
+      if (__builtin_expect (cp[0], '\1') == '\0' && ch != 0)		      \
 	{								      \
 	  /* Illegal character.  */					      \
 	  if (! ignore_errors_p ())					      \
@@ -13458,7 +13459,8 @@ static const char __gbk_from_ucs4_tab12[][2] =
 	  ++*converted;							      \
 	}								      \
       /* See whether there is enough room for the second byte we write.  */   \
-      else if (NEED_LENGTH_TEST && cp[1] != '\0' && outptr + 1 >= outend)     \
+      else if (NEED_LENGTH_TEST && cp[1] != '\0'			      \
+	       && __builtin_expect (outptr + 1 >= outend, 0))		      \
 	{								      \
 	  /* We have not enough room.  */				      \
 	  result = __GCONV_FULL_OUTPUT;					      \
diff --git a/iconvdata/iso-2022-cn.c b/iconvdata/iso-2022-cn.c
index c89fc57..69f5e17 100644
--- a/iconvdata/iso-2022-cn.c
+++ b/iconvdata/iso-2022-cn.c
@@ -86,15 +86,13 @@ enum
 	  								      \
 	  /* We are not in the initial state.  To switch back we have	      \
 	     to emit `SI'.  */						      \
-	  if (outbuf == data->__outbufend)				      \
+	  if (__builtin_expect (outbuf == data->__outbufend, 0))	      \
 	    /* We don't have enough room in the output buffer.  */	      \
 	    status = __GCONV_FULL_OUTPUT;				      \
 	  else								      \
 	    {								      \
 	      /* Write out the shift sequence.  */			      \
 	      *outbuf++ = SI;						      \
-	      if (data->__flags & __GCONV_IS_LAST)			      \
-		*written += 1;						      \
 	      data->__outbuf = outbuf;					      \
 	      data->__statep->__count = ASCII_set;			      \
 	    }								      \
@@ -121,7 +119,7 @@ enum
     uint32_t ch = *inptr;						      \
 									      \
     /* This is a 7bit character set, disallow all 8bit characters.  */	      \
-    if (ch > 0x7f)							      \
+    if (__builtin_expect (ch, 0) > 0x7f)				      \
       {									      \
 	if (! ignore_errors_p ())					      \
 	  {								      \
@@ -135,7 +133,7 @@ enum
       }									      \
 									      \
     /* Recognize escape sequences.  */					      \
-    if (ch == ESC)							      \
+    if (__builtin_expect (ch, 0) == ESC)				      \
       {									      \
 	/* There are two kinds of escape sequences we have to handle:	      \
 	   - those announcing the use of GB and CNS characters on the	      \
@@ -143,12 +141,15 @@ enum
 	   - the initial byte of the SS2 sequence.			      \
 	*/								      \
 	if (NEED_LENGTH_TEST						      \
-	    && (inptr + 1 > inend					      \
+	    && (__builtin_expect (inptr + 1 > inend, 0)			      \
 		|| (inptr[1] == '$'					      \
-		    && (inptr + 2 > inend				      \
-			|| (inptr[2] == ')' && inptr + 3 > inend)	      \
-			|| (inptr[2] == '*' && inptr + 3 > inend)))	      \
-		|| (inptr[1] == SS2_1 && inptr + 3 > inend)))		      \
+		    && (__builtin_expect (inptr + 2 > inend, 0)		      \
+			|| (inptr[2] == ')'				      \
+			    && __builtin_expect (inptr + 3 > inend, 0))	      \
+			|| (inptr[2] == '*'				      \
+			    && __builtin_expect (inptr + 3 > inend, 0))))     \
+		|| (inptr[1] == SS2_1					      \
+		    && __builtin_expect (inptr + 3 > inend, 0))))	      \
 	  {								      \
 	    result = __GCONV_EMPTY_INPUT;				      \
 	    break;							      \
@@ -166,7 +167,7 @@ enum
 	    continue;							      \
 	  }								      \
       }									      \
-    else if (ch == SO)							      \
+    else if (__builtin_expect (ch, 0) == SO)				      \
       {									      \
 	/* Switch to use GB2312 or CNS 11643 plane 1, depending on which      \
 	   S0 designation came last.  The only problem is what to do with     \
@@ -177,7 +178,7 @@ enum
 	set = ann == CNS11643_1_ann ? CNS11643_1_set : GB2312_set;	      \
 	continue;							      \
       }									      \
-    else if (ch == SI)							      \
+    else if (__builtin_expect (ch, 0) == SI)				      \
       {									      \
 	/* Switch to use ASCII.  */					      \
 	++inptr;							      \
@@ -185,14 +186,14 @@ enum
 	continue;							      \
       }									      \
 									      \
-    if (ch == ESC && inptr[1] == SS2_1)					      \
+    if (__builtin_expect (ch, 0) == ESC && inptr[1] == SS2_1)		      \
       {									      \
 	/* This is a character from CNS 11643 plane 2.			      \
 	   XXX We could test here whether the use of this character	      \
 	   set was announced.  */					      \
 	inptr += 2;							      \
 	ch = cns11643l2_to_ucs4 (&inptr, 2, 0);				      \
-	if (ch == __UNKNOWN_10646_CHAR)					      \
+	if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)		      \
 	  {								      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
@@ -224,12 +225,12 @@ enum
 				     NEED_LENGTH_TEST ? inend - inptr : 2, 0);\
 	  }								      \
 									      \
-	if (NEED_LENGTH_TEST && ch == 0)				      \
+	if (NEED_LENGTH_TEST && __builtin_expect (ch, 1) == 0)		      \
 	  {								      \
 	    result = __GCONV_EMPTY_INPUT;				      \
 	    break;							      \
 	  }								      \
-	else if (ch == __UNKNOWN_10646_CHAR)				      \
+	else if (__builtin_expect (ch, 1) == __UNKNOWN_10646_CHAR)	      \
 	  {								      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
@@ -261,10 +262,7 @@ enum
 #define LOOPFCT			TO_LOOP
 #define BODY \
   {									      \
-    uint32_t ch;							      \
-    size_t written = 0;							      \
-									      \
-    ch = get32 (inptr);							      \
+    uint32_t ch = get32 (inptr);					      \
 									      \
     /* First see whether we can write the character using the currently	      \
        selected character set.  */					      \
@@ -274,7 +272,7 @@ enum
 	  {								      \
 	    *outptr++ = SI;						      \
 	    set = ASCII_set;						      \
-	    if (NEED_LENGTH_TEST && outptr == outend)			      \
+	    if (NEED_LENGTH_TEST && __builtin_expet (outptr == outend, 0))    \
 	      {								      \
 		result = __GCONV_FULL_OUTPUT;				      \
 		break;							      \
@@ -282,7 +280,6 @@ enum
 	  }								      \
 									      \
 	*outptr++ = ch;							      \
-	written = 1;							      \
 									      \
 	/* At the end of the line we have to clear the `ann' flags since      \
 	   every line must contain this information again.  */		      \
@@ -293,6 +290,7 @@ enum
       {									      \
 	char buf[2];							      \
 	int used;							      \
+	size_t written = 0;						      \
 									      \
 	if (set == GB2312_set || (ann & CNS11643_1_ann) == 0)		      \
 	  {								      \
@@ -321,7 +319,7 @@ enum
 		else							      \
 		  written = ucs4_to_gb2312 (ch, buf, 2);		      \
 									      \
-		if (written != __UNKNOWN_10646_CHAR)			      \
+		if (__builin_expect (written, 0) != __UNKNOWN_10646_CHAR)     \
 		  /* Oh well, then switch SO.  */			      \
 		  used = GB2312_set + CNS11643_1_set - set;		      \
 		else							      \
@@ -350,7 +348,8 @@ enum
 	      {								      \
 		const char *escseq;					      \
 									      \
-		if (NEED_LENGTH_TEST && outptr + 4 > outend)		      \
+		if (NEED_LENGTH_TEST					      \
+		    && __builtin_expect (outptr + 4 > outend, 0))	      \
 		  {							      \
 		    result = __GCONV_FULL_OUTPUT;			      \
 		    break;						      \
@@ -373,7 +372,7 @@ enum
 									      \
 	    if (used == CNS11643_2_set)					      \
 	      {								      \
-		if (outptr + 2 > outend)				      \
+		if (__builtin_expect (outptr + 2 > outend, 0))		      \
 		  {							      \
 		    result = __GCONV_FULL_OUTPUT;			      \
 		    break;						      \
@@ -388,7 +387,7 @@ enum
 		   SO charset.  */					      \
 		if (set == ASCII_set)					      \
 		  {							      \
-		    if (outptr + 1 > outend)				      \
+		    if (__builtin_expect (outptr + 1 > outend, 0))	      \
 		      {							      \
 			result = __GCONV_FULL_OUTPUT;			      \
 			break;						      \
@@ -399,13 +398,14 @@ enum
 									      \
 	    /* Always test the length here since we have used up all the      \
 	       guaranteed output buffer slots.  */			      \
-	    if (outptr + 2 > outend)					      \
+	    if (__builtin_expect (outptr + 2 > outend, 0))		      \
 	      {								      \
 		result = __GCONV_FULL_OUTPUT;				      \
 		break;							      \
 	      }								      \
 	  }								      \
-	else if (NEED_LENGTH_TEST && outptr + 2 > outend)		      \
+	else if (NEED_LENGTH_TEST					      \
+		 && __builtin_expect (outptr + 2 > outend, 0))		      \
 	  {								      \
 	    result = __GCONV_FULL_OUTPUT;				      \
 	    break;							      \
diff --git a/iconvdata/iso-2022-jp.c b/iconvdata/iso-2022-jp.c
index 51420fb..25ca75c 100644
--- a/iconvdata/iso-2022-jp.c
+++ b/iconvdata/iso-2022-jp.c
@@ -141,7 +141,7 @@ gconv_init (struct __gconv_step *step)
     }
 
   result = __GCONV_NOCONV;
-  if (dir != illegal_dir)
+  if (__builtin_expect (dir, from_iso2022jp) != illegal_dir)
     {
       new_data
 	= (struct iso2022jp_data *) malloc (sizeof (struct iso2022jp_data));
@@ -208,7 +208,7 @@ gconv_end (struct __gconv_step *data)
 									      \
 	  /* We are not in the initial state.  To switch back we have	      \
 	     to emit the sequence `Esc ( B'.  */			      \
-	  if (outbuf + 3 > data->__outbufend)				      \
+	  if (__builtin_expect (outbuf + 3 > data->__outbufend, 0))	      \
 	    /* We don't have enough room in the output buffer.  */	      \
 	    status = __GCONV_FULL_OUTPUT;				      \
 	  else								      \
@@ -217,8 +217,6 @@ gconv_end (struct __gconv_step *data)
 	      *outbuf++ = ESC;						      \
 	      *outbuf++ = '(';						      \
 	      *outbuf++ = 'B';						      \
-	      if (data->__flags & __GCONV_IS_LAST)			      \
-	        *written += 3;						      \
 	      data->__outbuf = outbuf;					      \
 	      /* Note that this also clears the G2 designation.  */	      \
 	      data->__statep->__count &= ~7;				      \
@@ -247,16 +245,16 @@ gconv_end (struct __gconv_step *data)
     uint32_t ch = *inptr;						      \
 									      \
     /* Recognize escape sequences.  */					      \
-    if (ch == ESC)							      \
+    if (__builtin_expect (ch, 0) == ESC)				      \
       {									      \
 	/* We now must be prepared to read two to three more		      \
 	   chracters.  If we have a match in the first character but	      \
 	   then the input buffer ends we terminate with an error since	      \
 	   we must not risk missing an escape sequence just because it	      \
 	   is not entirely in the current input buffer.  */		      \
-	if (inptr + 2 >= inend						      \
+	if (__builtin_expect (inptr + 2 >= inend, 0)			      \
 	    || (var == iso2022jp2 && inptr[1] == '$' && inptr[2] == '('	      \
-		&& inptr + 3 >= inend))					      \
+		&& __builtin_expect (inptr + 3 >= inend, 0)))		      \
 	  {								      \
 	    /* Not enough input available.  */				      \
 	    result = __GCONV_EMPTY_INPUT;				      \
@@ -357,7 +355,7 @@ gconv_end (struct __gconv_step *data)
 	    ch = inptr[2] | 0x80;					      \
 	    inptr += 3;							      \
 	  }								      \
-	else if (set2 == ISO88597_set)					      \
+	else if (__builtin_expect (set2, ISO88597_set) == ISO88597_set)	      \
 	  {								      \
 	    /* We use the table from the ISO 8859-7 module.  */		      \
 	    if (inptr[2] < 0x20 || inptr[2] > 0x80)			      \
@@ -407,7 +405,7 @@ gconv_end (struct __gconv_step *data)
       {									      \
 	/* Use the JIS X 0201 table.  */				      \
 	ch = jisx0201_to_ucs4 (ch);					      \
-	if (ch == __UNKNOWN_10646_CHAR)					      \
+	if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)		      \
 	  {								      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
@@ -425,7 +423,7 @@ gconv_end (struct __gconv_step *data)
       {									      \
 	/* Use the JIS X 0201 table.  */				      \
 	ch = jisx0201_to_ucs4 (ch + 0x80);				      \
-	if (ch == __UNKNOWN_10646_CHAR)					      \
+	if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)		      \
 	  {								      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
@@ -465,12 +463,12 @@ gconv_end (struct __gconv_step *data)
 				  NEED_LENGTH_TEST ? inend - inptr : 2, 0);   \
 	  }								      \
 									      \
-	if (NEED_LENGTH_TEST && ch == 0)				      \
+	if (NEED_LENGTH_TEST && __builtin_expect (ch, 1) == 0)		      \
 	  {								      \
 	    result = __GCONV_EMPTY_INPUT;				      \
 	    break;							      \
 	  }								      \
-	else if (ch == __UNKNOWN_10646_CHAR)				      \
+	else if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)	      \
 	  {								      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
@@ -575,7 +573,7 @@ gconv_end (struct __gconv_step *data)
 					? outend - outptr : 2));	      \
 	  }								      \
 									      \
-	if (NEED_LENGTH_TEST && written == 0)				      \
+	if (NEED_LENGTH_TEST && __builtin_expect (written, 1) == 0)	      \
 	  {								      \
 	    result = __GCONV_FULL_OUTPUT;				      \
 	    break;							      \
@@ -633,7 +631,7 @@ gconv_end (struct __gconv_step *data)
 	  {								      \
 	    /* We must encode using ASCII.  First write out the		      \
 	       escape sequence.  */					      \
-	    if (NEED_LENGTH_TEST && outptr + 3 > outend)		      \
+	    if (NEED_LENGTH_TEST && __builtin_expect (outptr + 3 > outend, 0))\
 	      {								      \
 		result = __GCONV_FULL_OUTPUT;				      \
 		break;							      \
@@ -644,7 +642,7 @@ gconv_end (struct __gconv_step *data)
 	    *outptr++ = 'B';						      \
 	    set = ASCII_set;						      \
 									      \
-	    if (NEED_LENGTH_TEST && outptr + 1 > outend)		      \
+	    if (NEED_LENGTH_TEST && __builtin_expect (outptr + 1 > outend, 0))\
 	      {								      \
 		result = __GCONV_FULL_OUTPUT;				      \
 		break;							      \
@@ -668,7 +666,8 @@ gconv_end (struct __gconv_step *data)
 	    if (written != __UNKNOWN_10646_CHAR && buf[0] < 0x80)	      \
 	      {								      \
 		/* We use JIS X 0201.  */				      \
-		if (NEED_LENGTH_TEST && outptr + 3 > outend)		      \
+		if (NEED_LENGTH_TEST					      \
+		    && __builtin_expect (outptr + 3 > outend, 0))	      \
 		  {							      \
 		    result = __GCONV_FULL_OUTPUT;			      \
 		    break;						      \
@@ -679,7 +678,8 @@ gconv_end (struct __gconv_step *data)
 		*outptr++ = 'J';					      \
 		set = JISX0201_Roman_set;				      \
 									      \
-		if (NEED_LENGTH_TEST && outptr + 1 > outend)		      \
+		if (NEED_LENGTH_TEST					      \
+		    && __builtin_expect (outptr + 1 > outend, 0))	      \
 		  {							      \
 		    result = __GCONV_FULL_OUTPUT;			      \
 		    break;						      \
@@ -692,7 +692,8 @@ gconv_end (struct __gconv_step *data)
 		if (written != __UNKNOWN_10646_CHAR)			      \
 		  {							      \
 		    /* We use JIS X 0208.  */				      \
-		    if (NEED_LENGTH_TEST && outptr + 3 > outend)	      \
+		    if (NEED_LENGTH_TEST				      \
+			&& __builtin_expect (outptr + 3 > outend, 0))	      \
 		      {							      \
 			result = __GCONV_FULL_OUTPUT;			      \
 			break;						      \
@@ -703,7 +704,8 @@ gconv_end (struct __gconv_step *data)
 		    *outptr++ = 'B';					      \
 		    set = JISX0208_1983_set;				      \
 									      \
-		    if (NEED_LENGTH_TEST && outptr + 2 > outend)	      \
+		    if (NEED_LENGTH_TEST				      \
+			&& __builtin_expect (outptr + 2 > outend, 0))	      \
 		      {							      \
 			result = __GCONV_FULL_OUTPUT;			      \
 			break;						      \
@@ -711,7 +713,7 @@ gconv_end (struct __gconv_step *data)
 		    *outptr++ = buf[0];					      \
 		    *outptr++ = buf[1];					      \
 		  }							      \
-		else if (var == iso2022jp)				      \
+		else if (__builtin_expect (var, iso2022jp2) == iso2022jp)     \
 		  {							      \
 		    /* We have no other choice.  */			      \
 		    if (! ignore_errors_p ())				      \
@@ -728,7 +730,8 @@ gconv_end (struct __gconv_step *data)
 		    if (written != __UNKNOWN_10646_CHAR)		      \
 		      {							      \
 			/* We use JIS X 0212.  */			      \
-			if (NEED_LENGTH_TEST && outptr + 4 > outend)	      \
+			if (NEED_LENGTH_TEST				      \
+			    && __builtin_expect (outptr + 4 > outend, 0))     \
 			  {						      \
 			    result = __GCONV_FULL_OUTPUT;		      \
 			    break;					      \
@@ -739,7 +742,8 @@ gconv_end (struct __gconv_step *data)
 			*outptr++ = 'D';				      \
 			set = JISX0212_set;				      \
 									      \
-			if (NEED_LENGTH_TEST && outptr + 2 > outend)	      \
+			if (NEED_LENGTH_TEST				      \
+			    && __builtin_expect (outptr + 2 > outend, 0))     \
 			  {						      \
 			    result = __GCONV_FULL_OUTPUT;		      \
 			    break;					      \
@@ -754,7 +758,8 @@ gconv_end (struct __gconv_step *data)
 			    && buf[0] >= 0x80)				      \
 			  {						      \
 			    /* We use JIS X 0201.  */			      \
-			    if (NEED_LENGTH_TEST && outptr + 3 > outend)      \
+			    if (NEED_LENGTH_TEST			      \
+				&& __builtin_expect (outptr + 3 > outend, 0)) \
 			      {						      \
 			        result = __GCONV_FULL_OUTPUT;		      \
 			        break;					      \
@@ -765,7 +770,8 @@ gconv_end (struct __gconv_step *data)
 			    *outptr++ = 'I';				      \
 			    set = JISX0201_Kana_set;			      \
 									      \
-			    if (NEED_LENGTH_TEST && outptr + 1 > outend)      \
+			    if (NEED_LENGTH_TEST			      \
+				&& __builtin_expect (outptr + 1 > outend, 0)) \
 			      {						      \
 			        result = __GCONV_FULL_OUTPUT;		      \
 			        break;					      \
@@ -775,7 +781,8 @@ gconv_end (struct __gconv_step *data)
 			else if (ch != 0xa5 && ch >= 0x80 && ch <= 0xff)      \
 			  {						      \
 			    /* ISO 8859-1 upper half.   */		      \
-			    if (NEED_LENGTH_TEST && outptr + 3 > outend)      \
+			    if (NEED_LENGTH_TEST			      \
+				&& __builtin_expect (outptr + 3 > outend, 0)) \
 			      {						      \
 				result = __GCONV_FULL_OUTPUT;		      \
 				break;					      \
@@ -786,7 +793,8 @@ gconv_end (struct __gconv_step *data)
 			    *outptr++ = 'A';				      \
 			    set2 = ISO88591_set;			      \
 									      \
-			    if (NEED_LENGTH_TEST && outptr + 3 > outend)      \
+			    if (NEED_LENGTH_TEST			      \
+				&& __builtin_expect (outptr + 3 > outend, 0)) \
 			      {						      \
 				result = __GCONV_FULL_OUTPUT;		      \
 				break;					      \
@@ -801,7 +809,9 @@ gconv_end (struct __gconv_step *data)
 			    if (written != __UNKNOWN_10646_CHAR)	      \
 			      {						      \
 				/* We use GB 2312.  */			      \
-				if (NEED_LENGTH_TEST && outptr + 3 > outend)  \
+				if (NEED_LENGTH_TEST			      \
+				    && __builtin_expect (outptr + 3 > outend, \
+							 0)		      \
 				  {					      \
 				    result = __GCONV_FULL_OUTPUT;	      \
 				    break;				      \
@@ -812,7 +822,9 @@ gconv_end (struct __gconv_step *data)
 				*outptr++ = 'A';			      \
 				set = GB2312_set;			      \
 									      \
-				if (NEED_LENGTH_TEST && outptr + 2 > outend)  \
+				if (NEED_LENGTH_TEST			      \
+				    && __builtin_expect (outptr + 2 > outend, \
+							 0))		      \
 				  {					      \
 				    result = __GCONV_FULL_OUTPUT;	      \
 				    break;				      \
@@ -827,7 +839,8 @@ gconv_end (struct __gconv_step *data)
 				  {					      \
 				    /* We use KSC 5601.  */		      \
 				    if (NEED_LENGTH_TEST		      \
-					&& outptr + 4 > outend)		      \
+					&& __builtin_expect (outptr + 4	      \
+							     > outend, 0))    \
 				      {					      \
 					result = __GCONV_FULL_OUTPUT;	      \
 					break;				      \
@@ -839,7 +852,8 @@ gconv_end (struct __gconv_step *data)
 				    set = KSC5601_set;			      \
 									      \
 				    if (NEED_LENGTH_TEST		      \
-					&& outptr + 2 > outend)		      \
+					&& __builtin_expect (outptr + 2	      \
+							     > outend, 0))    \
 				      {					      \
 					result = __GCONV_FULL_OUTPUT;	      \
 					break;				      \
@@ -860,11 +874,12 @@ gconv_end (struct __gconv_step *data)
 					gch = iso88597_from_ucs4[ch];	      \
 				      }					      \
 									      \
-				    if (gch != 0)			      \
+				    if (__builtin_expect (gch, 1) != 0)	      \
 				      {					      \
 					/* We use ISO 8859-7 greek.  */	      \
 					if (NEED_LENGTH_TEST		      \
-					    && outptr + 3 > outend)	      \
+					    && __builtin_expect (outptr + 3   \
+								 > outend, 0))\
 					  {				      \
 					    result = __GCONV_FULL_OUTPUT;     \
 					    break;			      \
@@ -875,7 +890,8 @@ gconv_end (struct __gconv_step *data)
 					set2 = ISO88597_set;		      \
 									      \
 					if (NEED_LENGTH_TEST		      \
-					    && outptr + 3 > outend)	      \
+					    && __builtin_expect (outptr + 3   \
+								 > outend, 0))\
 					  {				      \
 					    result = __GCONV_FULL_OUTPUT;     \
 					    break;			      \
diff --git a/iconvdata/iso-2022-kr.c b/iconvdata/iso-2022-kr.c
index e6db8c4..c4ef73e 100644
--- a/iconvdata/iso-2022-kr.c
+++ b/iconvdata/iso-2022-kr.c
@@ -88,15 +88,13 @@ enum
 	  								      \
 	  /* We are not in the initial state.  To switch back we have	      \
 	     to emit `SI'.  */						      \
-	  if (outbuf == data->__outbufend)				      \
+	  if (__builtin_expect (outbuf == data->__outbufend, 0))	      \
 	    /* We don't have enough room in the output buffer.  */	      \
 	    status = __GCONV_FULL_OUTPUT;				      \
 	  else								      \
 	    {								      \
 	      /* Write out the shift sequence.  */			      \
 	      *outbuf++ = SI;						      \
-	      if (data->__flags & __GCONV_IS_LAST)			      \
-		*written += 1;						      \
 	      data->__outbuf = outbuf;					      \
 	      data->__statep->__count = ASCII_set;			      \
 	    }								      \
@@ -123,7 +121,7 @@ enum
     uint32_t ch = *inptr;						      \
 									      \
     /* This is a 7bit character set, disallow all 8bit characters.  */	      \
-    if (ch > 0x7f)							      \
+    if (__builtin_expect (ch, 0) > 0x7f)				      \
       {									      \
 	if (! ignore_errors_p ())					      \
 	  {								      \
@@ -137,16 +135,18 @@ enum
       }									      \
 									      \
     /* Recognize escape sequences.  */					      \
-    if (ch == ESC)							      \
+    if (__builtin_expect (ch, 0) == ESC)				      \
       {									      \
 	/* We don't really have to handle escape sequences since all the      \
 	   switching is done using the SI and SO bytes.  But we have to	      \
 	   recognize `Esc $ ) C' since this is a kind of flag for this	      \
 	   encoding.  We simply ignore it.  */				      \
-	if ((NEED_LENGTH_TEST && inptr + 1 > inend)			      \
+	if ((NEED_LENGTH_TEST && __builtin_expect (inptr + 1 > inend, 0))     \
 	    || (inptr[1] == '$'						      \
-		&& ((NEED_LENGTH_TEST && inptr + 2 > inend)		      \
-		    || (inptr[2] == ')' && inptr + 3 > inend))))	      \
+		&& ((NEED_LENGTH_TEST					      \
+		     && __builtin_expect (inptr + 2 > inend, 0))	      \
+		    || (inptr[2] == ')'					      \
+			&& __builtin_expect (inptr + 3 > inend, 0)))))	      \
 									      \
 	  {								      \
 	    result = __GCONV_EMPTY_INPUT;				      \
@@ -159,14 +159,14 @@ enum
 	    continue;							      \
 	  }								      \
       }									      \
-    else if (ch == SO)							      \
+    else if (__builtin_expect (ch, 0) == SO)				      \
       {									      \
 	/* Switch to use KSC.  */					      \
 	++inptr;							      \
 	set = KSC5601_set;						      \
 	continue;							      \
       }									      \
-    else if (ch == SI)							      \
+    else if (__builtin_expect (ch, 0) == SI)				      \
       {									      \
 	/* Switch to use ASCII.  */					      \
 	++inptr;							      \
@@ -187,12 +187,12 @@ enum
 	ch = ksc5601_to_ucs4 (&inptr,					      \
 			      NEED_LENGTH_TEST ? inend - inptr : 2, 0);	      \
 									      \
-	if (NEED_LENGTH_TEST && ch == 0)				      \
+	if (NEED_LENGTH_TEST && __builtin_expect (ch, 1) == 0)		      \
 	  {								      \
 	    result = __GCONV_EMPTY_INPUT;				      \
 	    break;							      \
 	  }								      \
-	else if (ch == __UNKNOWN_10646_CHAR)				      \
+	else if (__builtin_expect (ch, 0) == __UNKNOWN_10646_CHAR)	      \
 	  {								      \
 	    if (! ignore_errors_p ())					      \
 	      {								      \
@@ -252,7 +252,7 @@ enum
 									      \
 	written = ucs4_to_ksc5601 (ch, buf, 2);				      \
 									      \
-	if (written == __UNKNOWN_10646_CHAR)				      \
+	if (__builtin_expect (written, 0) == __UNKNOWN_10646_CHAR)	      \
 	  {								      \
 	    /* Illegal character.  */					      \
 	    if (! ignore_errors_p ())					      \
@@ -274,7 +274,7 @@ enum
 		set = KSC5601_set;					      \
 	      }								      \
 									      \
-	    if (NEED_LENGTH_TEST && outptr + 2 > outend)		      \
+	    if (NEED_LENGTH_TEST && __builtin_expect (outptr + 2 > outend, 0))\
 	      {								      \
 		result = __GCONV_FULL_OUTPUT;				      \
 		break;							      \