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| author | Toshiyasu Morita <tm@netcom.com> | 1999-04-03 15:29:41 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1999-04-03 08:29:41 -0700 |
| commit | 0ea78edbd7375b83ae45d275e89fc8a5e0b25ebb (patch) | |
| tree | 2b992d75cb0febac853d6e478477ea1521048402 | |
| parent | 1ed9faeecbbba8773351ef52c72611327c4c049b (diff) | |
| download | gcc-0ea78edbd7375b83ae45d275e89fc8a5e0b25ebb.zip gcc-0ea78edbd7375b83ae45d275e89fc8a5e0b25ebb.tar.gz gcc-0ea78edbd7375b83ae45d275e89fc8a5e0b25ebb.tar.bz2 | |
* gcc.texi: Add info on regmove pass
From-SVN: r26160
| -rw-r--r-- | gcc/ChangeLog | 2 | ||||
| -rw-r--r-- | gcc/gcc.texi | 12 |
2 files changed, 14 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 04fa23f..07b77f8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,7 @@ Sat Apr 3 16:22:59 1999 Toshiyasu Morita (tm@netcom.com) + * gcc.texi: Add info on regmove pass + * regmove.c (fixup_match_1): Consistently evaluate HAVE_POST_INCREMENT and HAVE_POST_DECREMENT. diff --git a/gcc/gcc.texi b/gcc/gcc.texi index 4f9ceeb..1682816 100644 --- a/gcc/gcc.texi +++ b/gcc/gcc.texi @@ -3458,6 +3458,18 @@ The option @samp{-dc} causes a debugging dump of the RTL code after this pass. This dump file's name is made by appending @samp{.combine} to the input file name. +@cindex register movement +@item +Register movement (@file{regmove.c}). This pass looks for cases where +matching constraints would force an instruction to need a reload, and +this reload would be a register to register move. It them attempts +to change the registers used by the instruction to avoid the move +instruction. + +The option @samp{-dN} causes a debugging dump of the RTL code after +this pass. This dump file's name is made by appending @samp{.regmove} +to the input file name. + @cindex instruction scheduling @cindex scheduling, instruction @item |