diff options
Diffstat (limited to 'gcc/doc/rtl.texi')
| -rw-r--r-- | gcc/doc/rtl.texi | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 1c9a4e49230..adf73a4c6a6 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -1,4 +1,4 @@ -@c Copyright (C) 1988, 1989, 1992, 1994, 1997, 1998, 1999, 2000, 2001, 2002 +@c Copyright (C) 1988, 1989, 1992, 1994, 1997, 1998, 1999, 2000, 2001, 2002, 2003 @c Free Software Foundation, Inc. @c This is part of the GCC manual. @c For copying conditions, see the file gcc.texi. @@ -244,7 +244,7 @@ from an @samp{md} file, the vector value of this operand may be omitted. An omitted vector is effectively the same as a vector of no elements. @item B -@samp{B} indicates a pointer to basic block strucure. +@samp{B} indicates a pointer to basic block structure. @item 0 @samp{0} means a slot whose contents do not fit any normal category. @@ -1854,14 +1854,14 @@ valid. Comparison operators test a relation on two operands and are considered to represent a machine-dependent nonzero value described by, but not necessarily equal to, @code{STORE_FLAG_VALUE} (@pxref{Misc}) -if the relation holds, or zero if it does not. The mode of the -comparison operation is independent of the mode of the data being -compared. If the comparison operation is being tested (e.g., the first -operand of an @code{if_then_else}), the mode must be @code{VOIDmode}. -If the comparison operation is producing data to be stored in some -variable, the mode must be in class @code{MODE_INT}. All comparison -operations producing data must use the same mode, which is -machine-specific. +if the relation holds, or zero if it does not, for comparison operators +whose results have a `MODE_INT' mode, and +@code{FLOAT_STORE_FLAG_VALUE} (@pxref{Misc}) if the relation holds, or +zero if it does not, for comparison operators that return floating-point +values. The mode of the comparison operation is independent of the mode +of the data being compared. If the comparison operation is being tested +(e.g., the first operand of an @code{if_then_else}), the mode must be +@code{VOIDmode}. @cindex condition codes There are two ways that comparison operations may be used. The @@ -2841,7 +2841,7 @@ labels: @code{LABEL_NORMAL}, @code{LABEL_STATIC_ENTRY}, that do not have type @code{LABEL_NORMAL} are @dfn{alternate entry points} to the current function. These may be static (visible only in the containing translation unit), global (exposed to all translation -units), or weak (global, but can be overriden by another symbol with the +units), or weak (global, but can be overridden by another symbol with the same name). Much of the compiler treats all four kinds of label identically. Some @@ -3254,12 +3254,6 @@ are stored in the @code{REG_NOTES} field of an insn as an @code{expr_list}. @table @code -@findex REG_EXEC_COUNT -@item REG_EXEC_COUNT -This is used to indicate the number of times a basic block was executed -according to the profile data. The note is attached to the first insn in -the basic block. - @findex REG_BR_PROB @item REG_BR_PROB This is used to specify the ratio of branches to non-branches of a |