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| author | liuhongt <hongtao.liu@intel.com> | 2021-09-06 13:48:49 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2021-10-08 10:08:50 +0800 |
| commit | 2b8453c401b699ed93c085d0413ab4b5030bcdb8 (patch) | |
| tree | f9a9cf8ec427c026f8a9ff7391e740b72a9cc050 /gcc/doc | |
| parent | 50e20ee6e40643c23b53bacda4db4dd9573d7c8a (diff) | |
| download | gcc-2b8453c401b699ed93c085d0413ab4b5030bcdb8.zip gcc-2b8453c401b699ed93c085d0413ab4b5030bcdb8.tar.gz gcc-2b8453c401b699ed93c085d0413ab4b5030bcdb8.tar.bz2 | |
Enable auto-vectorization at O2 with very-cheap cost model.
gcc/ChangeLog:
* common.opt (ftree-vectorize): Add Var(flag_tree_vectorize).
* doc/invoke.texi (Options That Control Optimization): Update
documents.
* opts.c (default_options_table): Enable auto-vectorization at
O2 with very-cheap cost model.
(finish_options): Use cheap cost model for
explicit -ftree{,-loop}-vectorize.
gcc/testsuite/ChangeLog:
* c-c++-common/Wstringop-overflow-2.c: Adjust testcase.
* g++.dg/tree-ssa/pr81408.C: Ditto.
* g++.dg/warn/Wuninitialized-13.C: Ditto.
* gcc.dg/Warray-bounds-51.c: Ditto.
* gcc.dg/Warray-parameter-3.c: Ditto.
* gcc.dg/Wstringop-overflow-14.c: Ditto.
* gcc.dg/Wstringop-overflow-21.c: Ditto.
* gcc.dg/Wstringop-overflow-68.c: Ditto.
* gcc.dg/Wstringop-overflow-76.c: Ditto.
* gcc.dg/gomp/pr46032-2.c: Ditto.
* gcc.dg/gomp/pr46032-3.c: Ditto.
* gcc.dg/gomp/simd-2.c: Ditto.
* gcc.dg/gomp/simd-3.c: Ditto.
* gcc.dg/graphite/fuse-1.c: Ditto.
* gcc.dg/pr67089-6.c: Ditto.
* gcc.dg/pr82929-2.c: Ditto.
* gcc.dg/pr82929.c: Ditto.
* gcc.dg/store_merging_1.c: Ditto.
* gcc.dg/store_merging_11.c: Ditto.
* gcc.dg/store_merging_13.c: Ditto.
* gcc.dg/store_merging_15.c: Ditto.
* gcc.dg/store_merging_16.c: Ditto.
* gcc.dg/store_merging_19.c: Ditto.
* gcc.dg/store_merging_24.c: Ditto.
* gcc.dg/store_merging_25.c: Ditto.
* gcc.dg/store_merging_28.c: Ditto.
* gcc.dg/store_merging_30.c: Ditto.
* gcc.dg/store_merging_5.c: Ditto.
* gcc.dg/store_merging_7.c: Ditto.
* gcc.dg/store_merging_8.c: Ditto.
* gcc.dg/strlenopt-85.c: Ditto.
* gcc.dg/tree-ssa/dump-6.c: Ditto.
* gcc.dg/tree-ssa/pr19210-1.c: Ditto.
* gcc.dg/tree-ssa/pr47059.c: Ditto.
* gcc.dg/tree-ssa/pr86017.c: Ditto.
* gcc.dg/tree-ssa/pr91482.c: Ditto.
* gcc.dg/tree-ssa/predcom-1.c: Ditto.
* gcc.dg/tree-ssa/predcom-dse-3.c: Ditto.
* gcc.dg/tree-ssa/prefetch-3.c: Ditto.
* gcc.dg/tree-ssa/prefetch-6.c: Ditto.
* gcc.dg/tree-ssa/prefetch-8.c: Ditto.
* gcc.dg/tree-ssa/prefetch-9.c: Ditto.
* gcc.dg/tree-ssa/ssa-dse-18.c: Ditto.
* gcc.dg/tree-ssa/ssa-dse-19.c: Ditto.
* gcc.dg/uninit-40.c: Ditto.
* gcc.dg/unroll-7.c: Ditto.
* gcc.misc-tests/help.exp: Ditto.
* gcc.target/i386/avx512vpopcntdqvl-vpopcntd-1.c: Ditto.
* gcc.target/i386/pr34012.c: Ditto.
* gcc.target/i386/pr49781-1.c: Ditto.
* gcc.target/i386/pr95798-1.c: Ditto.
* gcc.target/i386/pr95798-2.c: Ditto.
* gfortran.dg/pr77498.f: Ditto.
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 0500773..8b3ebcf 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10453,9 +10453,12 @@ also turns on the following optimization flags: -fstrict-aliasing @gol -fthread-jumps @gol -ftree-builtin-call-dce @gol +-ftree-loop-vectorize @gol -ftree-pre @gol +-ftree-slp-vectorize @gol -ftree-switch-conversion -ftree-tail-merge @gol --ftree-vrp} +-ftree-vrp @gol +-fvect-cost-model=very-cheap} Please note the warning under @option{-fgcse} about invoking @option{-O2} on programs that use computed gotos. @@ -10475,11 +10478,8 @@ by @option{-O2} and also turns on the following optimization flags: -fsplit-loops @gol -fsplit-paths @gol -ftree-loop-distribution @gol --ftree-loop-vectorize @gol -ftree-partial-pre @gol --ftree-slp-vectorize @gol -funswitch-loops @gol --fvect-cost-model @gol -fvect-cost-model=dynamic @gol -fversion-loops-for-strides} |