i386.c, [...]: Fix comment typos.

	* config/i386/i386.c, config/s390/s390.c, config/s390/s390.md,
	tree-ssa-loop-niter.c, tree-ssa-structalias.c, tree-vrp.c: Fix
	comment typos.

From-SVN: r123847

gcc/ChangeLog

+2007-04-15  Kazu Hirata  <kazu@codesourcery.com>
+
+	* config/i386/i386.c, config/s390/s390.c, config/s390/s390.md,
+	tree-ssa-loop-niter.c, tree-ssa-structalias.c, tree-vrp.c: Fix
+	comment typos.
+
 2007-04-11  Zdenek Dvorak  <dvorakz@suse.cz>
 
 	* tree-ssa-loop-prefetch.c (loop_prefetch_arrays): Ignore

gcc/config/i386/i386.c

@@ -13566,8 +13566,8 @@ scale_counter (rtx countreg, int scale)
   return sc;
 }
 
-/* Return mode for the memcpy/memset loop counter.  Preffer SImode over DImode
-   for constant loop counts.  */
+/* Return mode for the memcpy/memset loop counter.  Prefer SImode over
+   DImode for constant loop counts.  */
 
 static enum machine_mode
 counter_mode (rtx count_exp)
@@ -21141,7 +21141,7 @@ ix86_md_asm_clobbers (tree outputs ATTRIBUTE_UNUSED,
   return clobbers;
 }
 
-/* Implementes target vector targetm.asm.encode_section_info.  This
+/* Implements target vector targetm.asm.encode_section_info.  This
    is not used by netware.  */
 
 static void ATTRIBUTE_UNUSED

gcc/config/s390/s390.c

@@ -2656,7 +2656,7 @@ s390_secondary_reload (bool in_p, rtx x, enum reg_class class,
     sri->icode = (TARGET_64BIT ?
 		  CODE_FOR_reloaddi_plus : CODE_FOR_reloadsi_plus);
 
-  /* Peforming a multiword move from or to memory we have to make sure the
+  /* Performing a multiword move from or to memory we have to make sure the
      second chunk in memory is addressable without causing a displacement
      overflow.  If that would be the case we calculate the address in
      a scratch register.  */
@@ -2666,7 +2666,7 @@ s390_secondary_reload (bool in_p, rtx x, enum reg_class class,
       && !DISP_IN_RANGE (INTVAL (XEXP (XEXP (x, 0), 1))
 			 + GET_MODE_SIZE (mode) - 1))
     {
-      /* For GENERAL_REGS a displacement overflow is no problem if occuring
+      /* For GENERAL_REGS a displacement overflow is no problem if occurring
 	 in a s_operand address since we may fallback to lm/stm.  So we only
 	 have to care about overflows in the b+i+d case.  */
       if ((reg_classes_intersect_p (GENERAL_REGS, class)

gcc/config/s390/s390.md

@@ -308,7 +308,7 @@
 ;; within instruction mnemonics.
 (define_mode_attr bt [(TF "b") (DF "b") (SF "b") (TD "t") (DD "t") (SD "t")])
 
-;; Although it is unprecise for z9-ec we handle all dfp instructions like
+;; Although it is imprecise for z9-ec we handle all dfp instructions like
 ;; bfp regarding the pipeline description.
 (define_mode_attr bfp [(TF "tf") (DF "df") (SF "sf")
                        (TD "tf") (DD "df") (SD "sf")])

gcc/tree-ssa-loop-niter.c

@@ -2474,7 +2474,7 @@ record_estimate (struct loop *loop, tree bound, double_int i_bound,
     delta = double_int_two;
   i_bound = double_int_add (i_bound, delta);
 
-  /* If an overflow occured, ignore the result.  */
+  /* If an overflow occurred, ignore the result.  */
   if (double_int_ucmp (i_bound, delta) < 0)
     return;
 

gcc/tree-ssa-structalias.c

@@ -3226,7 +3226,7 @@ update_alias_info (tree stmt, struct alias_info *ai)
 	 combination of direct symbol references and pointer
 	 dereferences (e.g., MEMORY_VAR = *PTR) or if a call site has
 	 memory symbols in its argument list, but these cases do not
-	 occur so frequently as to constitue a serious problem.  */
+	 occur so frequently as to constitute a serious problem.  */
       if (STORED_SYMS (stmt))
 	EXECUTE_IF_SET_IN_BITMAP (STORED_SYMS (stmt), 0, i, bi)
 	  {

gcc/tree-vrp.c

@@ -1815,7 +1815,7 @@ extract_range_from_binary_expr (value_range_t *vr, tree expr)
 
       /* If we have a RSHIFT_EXPR with any shift values outside [0..prec-1],
 	 then drop to VR_VARYING.  Outside of this range we get undefined
-	 behaviour from the shift operation.  We cannot even trust
+	 behavior from the shift operation.  We cannot even trust
 	 SHIFT_COUNT_TRUNCATED at this stage, because that applies to rtl
 	 shifts, and the operation at the tree level may be widened.  */
       if (code == RSHIFT_EXPR)