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| author | David Wohlferd <dw@LimeGreenSocks.com> | 2015-11-16 21:57:12 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2015-11-16 14:57:12 -0700 |
| commit | 4f237f2ef0ef221a902b73a336b45154a5d8bc2f (patch) | |
| tree | 8779caa2eb26b786c8d42c9c63bb139dfc5a8c2d /gcc | |
| parent | 46d825c59cd6d5df4784b99dc0fcb878c2b7c24f (diff) | |
| download | gcc-4f237f2ef0ef221a902b73a336b45154a5d8bc2f.zip gcc-4f237f2ef0ef221a902b73a336b45154a5d8bc2f.tar.gz gcc-4f237f2ef0ef221a902b73a336b45154a5d8bc2f.tar.bz2 | |
inline asm and multi-alternative constraints
* doc/md.texi ('#' and '*' constraint modifiers): Do not include these
in the user documentation.
(define_peephole2, define_split): Similarly.
From-SVN: r230439
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/doc/md.texi | 5 |
2 files changed, 9 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5d6213f..b403718 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-11-16 David Wohlferd <dw@LimeGreenSocks.com> + + * doc/md.texi ('#' and '*' constraint modifiers): Do not include these + in the user documentation. + (define_peephole2, define_split): Similarly. + 2015-11-16 Andris Pavenis <andris.pavenis@iki.fi> * lto-streamer-out.c (write_global_references): Adjust integer type. diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 80a1f64..8b2deaa 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -1646,7 +1646,9 @@ instruction is defined: GCC can only handle one commutative pair in an asm; if you use more, the compiler may fail. Note that you need not use the modifier if the two alternatives are strictly identical; this would only waste -time in the reload pass. The modifier is not operational after +time in the reload pass. +@ifset INTERNALS +The modifier is not operational after register allocation, so the result of @code{define_peephole2} and @code{define_split}s performed after reload cannot rely on @samp{%} to make the intended insn match. @@ -1665,7 +1667,6 @@ constraint as a constraint, and no effect on reloading. For LRA @samp{*} additionally disparages slightly the alternative if the following character matches the operand. -@ifset INTERNALS Here is an example: the 68000 has an instruction to sign-extend a halfword in a data register, and can also sign-extend a value by copying it into an address register. While either kind of register is |