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Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index af58bfeb86e..228be529505 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -358,7 +358,7 @@ Objective-C and Objective-C++ Dialects}. -fvariable-expansion-in-unroller -ftree-reassoc @gol -ftree-pre -ftree-ccp -ftree-dce -ftree-loop-optimize @gol -ftree-loop-linear -ftree-loop-im -ftree-loop-ivcanon -fivopts @gol --fcheck-data-deps @gol +-fcheck-data-deps -ftree-parallelize-loops @gol -ftree-dominator-opts -ftree-dse -ftree-copyrename -ftree-sink @gol -ftree-ch -ftree-sra -ftree-ter -ftree-fre -ftree-vectorize @gol -ftree-vect-loop-version -fvect-cost-model -ftree-salias -fipa-pta -fweb @gol @@ -5744,6 +5744,14 @@ in connection with unrolling. Perform induction variable optimizations (strength reduction, induction variable merging and induction variable elimination) on trees. +@item -ftree-parallelize-loops=n +@opindex ftree-parallelize-loops=n +Parallelize loops, i.e., split their iteration space to run in n threads. +This is only possible for loops whose iterations are independent +and can be arbitrarily reordered. The optimization is only +profitable on multiprocessor machines, for loops that are CPU-intensive, +rather than constrained e.g. by memory bandwidth. + @item -ftree-sra Perform scalar replacement of aggregates. This pass replaces structure references with scalars to prevent committing structures to memory too |