diff options
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 11 | ||||
| -rw-r--r-- | gcc/opts.c | 4 |
3 files changed, 19 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0ee2d0592f8..ce73996a710 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2003-10-17 Jan Hubicka <jh@suse.cz> + + * opts.c (common_handle_option): Handle OPT_fweb + * invoke.texi (-fweb): Add missing parts of documentation. + 2003-10-17 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE> * config/mips/linux.h (FUNCTION_NAME_ALREADY_DECLARED): Undef diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index fd2040034a8..c8398386701 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -3687,7 +3687,7 @@ also turns on the following optimization flags: -fpeephole2 @gol -freorder-blocks -freorder-functions @gol -fstrict-aliasing @gol --funit-at-a-time @gol +-funit-at-a-time -fweb @gol -falign-functions -falign-jumps @gol -falign-loops -falign-labels} @@ -4378,6 +4378,15 @@ will most benefit processors with lots of registers. It can, however, make debugging impossible, since variables will no longer stay in a ``home register''. +@item -fweb +@opindex fweb +Constructs webs as commonly used for register allocation purposes and assign +each web individual pseudo register. This allows our register allocation pass +to operate on pseudos directly, but also strengthens several other optimization +passes, such as CSE, loop optimizer and trivial dead code remover. It can, +however, make debugging impossible, since variables will no longer stay in a +``home register''. + Enabled at levels @option{-O3}. @item -fno-cprop-registers diff --git a/gcc/opts.c b/gcc/opts.c index 8418d1a96c2..e4c9ad45494 100644 --- a/gcc/opts.c +++ b/gcc/opts.c @@ -1412,6 +1412,10 @@ common_handle_option (size_t scode, const char *arg, case OPT_fverbose_asm: flag_verbose_asm = value; break; + + case OPT_fweb: + flag_web = value; + break; case OPT_fwrapv: flag_wrapv = value; |