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| author | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 2003-04-21 22:13:01 +0000 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 2003-04-21 18:13:01 -0400 |
| commit | 9e91ce11be56032507e3732201649228937c7f6e (patch) | |
| tree | 4e840a3f866536fd250510f81aaef190a4dbdc7d /gcc | |
| parent | b6e59a3aed59f15e7d3aff85217c2df5044f8ba4 (diff) | |
| download | gcc-9e91ce11be56032507e3732201649228937c7f6e.zip gcc-9e91ce11be56032507e3732201649228937c7f6e.tar.gz gcc-9e91ce11be56032507e3732201649228937c7f6e.tar.bz2 | |
rtl.texi (RTX_UNCHANGING_P): Point to true_dependence for details of conflict handling.
* doc/rtl.texi (RTX_UNCHANGING_P): Point to true_dependence for
details of conflict handling.
From-SVN: r65912
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/doc/rtl.texi | 10 |
2 files changed, 10 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 724f043..6dcb245 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -69,7 +69,10 @@ * cpplib.h (struct cpp_callbacks): Change prototype of include. 2003-04-21 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> - + + * doc/rtl.texi (RTX_UNCHANGING_P): Point to true_dependence for + details of conflict handling. + * fold-const.c (extract_muldiv, case CONVERT_EXPR): Detect case when conversion overflows. diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index 79594f0..33057c3 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -723,10 +723,12 @@ Stored in the @code{integrated} field and printed as @samp{/i}. @cindex @code{concat} and @samp{/u} @cindex @code{unchanging}, in @code{reg} and @code{mem} @item RTX_UNCHANGING_P (@var{x}) -Nonzero in a @code{reg}, @code{mem}, or @code{concat} if the memory -is set at most once, -anywhere. This does not mean that it is function invariant. -Stored in the @code{unchanging} field and printed as @samp{/u}. +Nonzero in a @code{reg}, @code{mem}, or @code{concat} if the register or +memory is set at most once, anywhere. This does not mean that it is +function invariant. This flag is used to determine whether two +references conflict. See @code{tree_dependence} in @file{alias.c} for +more details. Stored in the @code{unchanging} field and printed as +@samp{/u}. @findex SCHED_GROUP_P @cindex @code{insn} and @samp{/s} |