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| author | Bill Wendling <isanbard@gmail.com> | 2009-04-29 00:15:41 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2009-04-29 00:15:41 +0000 |
| commit | be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2b (patch) | |
| tree | 61b5516b5232ee39d0cfb04473b2cc8076464a1c /docs/CommandGuide | |
| parent | a24d1b155831d25f543e0e4ece9b572cefda2f17 (diff) | |
| download | external_llvm-be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2b.zip external_llvm-be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2b.tar.gz external_llvm-be8cc2a3dedeb7685f07e68cdc4b9502eb97eb2b.tar.bz2 | |
Second attempt:
Massive check in. This changes the "-fast" flag to "-O#" in llc. If you want to
use the old behavior, the flag is -O0. This change allows for finer-grained
control over which optimizations are run at different -O levels.
Most of this work was pretty mechanical. The majority of the fixes came from
verifying that a "fast" variable wasn't used anymore. The JIT still uses a
"Fast" flag. I'll change the JIT with a follow-up patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70343 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/CommandGuide')
| -rw-r--r-- | docs/CommandGuide/llc.pod | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/CommandGuide/llc.pod b/docs/CommandGuide/llc.pod index f5fd34f..eba7859 100644 --- a/docs/CommandGuide/llc.pod +++ b/docs/CommandGuide/llc.pod @@ -41,6 +41,12 @@ Other B<llc> options are as follows: Print a summary of command line options. +=item B<-O>=I<uint> + +Generate code at different optimization levels. These correspond to the I<-O0>, +I<-O1>, I<-O2>, I<-O3>, and I<-O4> optimization levels used by B<llvm-gcc> and +B<clang>. + =item B<-f> Overwrite output files. By default, B<llc> will refuse to overwrite |