diff options
Diffstat (limited to 'gcc/doc/rtl.texi')
| -rw-r--r-- | gcc/doc/rtl.texi | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index f84dfad..6fcce63 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -2378,7 +2378,7 @@ rest of the register receives an undefined value. Likewise, if the mode of the register, the rest of the register can be changed in an undefined way. -If @var{lval} is a @code{strict_low_part} or @code{zero_extract} +If @var{lval} is a @code{strict_low_part} or @code{zero_extract} of a @code{subreg}, then the part of the register specified by the machine mode of the @code{subreg} is given the value @var{x} and the rest of the register is not changed. @@ -2462,7 +2462,7 @@ trouble to describe the values that are stored, but it is essential to inform the compiler that the registers will be altered, lest it attempt to keep data in them across the string instruction. -If @var{x} is @code{(mem:BLK (const_int 0))} or +If @var{x} is @code{(mem:BLK (const_int 0))} or @code{(mem:BLK (scratch))}, it means that all memory locations must be presumed clobbered. If @var{x} is a @code{parallel}, it has the same meaning as a @code{parallel} in a @code{set} expression. |