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| author | Scott McMurray <scottmcm@users.noreply.github.com> | 2018-03-17 15:34:12 -0700 |
|---|---|---|
| committer | Scott McMurray <scottmcm@users.noreply.github.com> | 2018-03-17 15:34:12 -0700 |
| commit | b4981923a05869ea2c50f1893acf433b1b67f79a (patch) | |
| tree | ab0bd8270dc3d035804bc15f411f25c16c38d9bf /src/librustc/session | |
| parent | 178becdd7c86d87b24951af18e4b7d45f3e1e7bc (diff) | |
| download | rust-b4981923a05869ea2c50f1893acf433b1b67f79a.tar.gz rust-b4981923a05869ea2c50f1893acf433b1b67f79a.zip | |
Add a -Z flag for LLVM align attributes on arguments
LLVM seems to still put the assume calls in when inlining, so this probably isn't in a place where it can be turned on by default, but it's interesting to experiment with. For example, this makes `swap::<u64x8>` be 8x `vmovaps ymm` instead of 16x `vmovups xmm`, on my cpu.
Diffstat (limited to 'src/librustc/session')
| -rw-r--r-- | src/librustc/session/config.rs | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs index 1c5cfa87ef4..a5eae35c556 100644 --- a/src/librustc/session/config.rs +++ b/src/librustc/session/config.rs @@ -1208,6 +1208,8 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options, "set the MIR optimization level (0-3, default: 1)"), mutable_noalias: bool = (false, parse_bool, [UNTRACKED], "emit noalias metadata for mutable references"), + arg_align_attributes: bool = (false, parse_bool, [UNTRACKED], + "emit align metadata for reference arguments"), dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED], "dump MIR state at various points in translation"), dump_mir_dir: String = (String::from("mir_dump"), parse_string, [UNTRACKED], |