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| author | Hans-Peter Nilsson <hp@axis.com> | 2002-05-30 01:05:05 +0000 |
|---|---|---|
| committer | Hans-Peter Nilsson <hp@gcc.gnu.org> | 2002-05-30 01:05:05 +0000 |
| commit | fde6d81fc077c0a7f1446799d5130b32c611dced (patch) | |
| tree | 310d9764e240700099bc5efcd2511ccf307453fe | |
| parent | 92898235fc895f1ce8d09bd77e4e28258179f803 (diff) | |
| download | gcc-fde6d81fc077c0a7f1446799d5130b32c611dced.zip gcc-fde6d81fc077c0a7f1446799d5130b32c611dced.tar.gz gcc-fde6d81fc077c0a7f1446799d5130b32c611dced.tar.bz2 | |
md.texi (Patterns): Note pattern condition pitfall for unnamed insn.
* doc/md.texi (Patterns): Note pattern condition pitfall
for unnamed insn.
From-SVN: r54035
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/doc/md.texi | 4 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0db129e..2fc43d5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-05-29 Hans-Peter Nilsson <hp@axis.com> + + * doc/md.texi (Patterns): Note pattern condition pitfall + for unnamed insn. + 2002-05-29 Aldy Hernandez <aldyh@redhat.com> * rs6000.c: (altivec_expand_builtin): Only expand altivec builtins diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi index 97b7789..24fab78d 100644 --- a/gcc/doc/md.texi +++ b/gcc/doc/md.texi @@ -158,7 +158,9 @@ available in a particular run. For nameless patterns, the condition is applied only when matching an individual insn, and only after the insn has matched the pattern's recognition template. The insn's operands may be found in the vector -@code{operands}. +@code{operands}. For an insn where the condition has once matched, it +can't be used to control register allocation, for example by excluding +certain hard registers or hard register combinations. @item The @dfn{output template}: a string that says how to output matching |