diff options
Diffstat (limited to 'gcc/doc/rtl.texi')
| -rw-r--r-- | gcc/doc/rtl.texi | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index ea30e38032e..0d348dc6b56 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -413,11 +413,17 @@ object associated with the reference. @item MEM_OFFSET (@var{x}) The offset from the start of @code{MEM_EXPR} as a @code{CONST_INT} rtx. +@findex MEM_SIZE_KNOWN_P +@item MEM_SIZE_KNOWN_P (@var{x}) +True if the size of the memory reference is known. +@samp{MEM_SIZE (@var{x})} provides its size if so. + @findex MEM_SIZE @item MEM_SIZE (@var{x}) -The size in bytes of the memory reference as a @code{CONST_INT} rtx. +The size in bytes of the memory reference. This is mostly relevant for @code{BLKmode} references as otherwise -the size is implied by the mode. +the size is implied by the mode. The value is only valid if +@samp{MEM_SIZE_KNOWN_P (@var{x})} is true. @findex MEM_ALIGN @item MEM_ALIGN (@var{x}) |