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| author | Dylan DPC <99973273+Dylan-DPC@users.noreply.github.com> | 2022-09-12 15:21:29 +0530 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-09-12 15:21:29 +0530 |
| commit | 413703201c59f25a5a2fded13d7ee4b4be4e8545 (patch) | |
| tree | cee719a745ed231d59c282c754a9d5628b3cc383 /compiler/rustc_codegen_llvm/src | |
| parent | 56e7678ca97e9740f7d09206f767d5bb676917f7 (diff) | |
| parent | 052887e4b4c86426423ecd6f244e3e25cd71dd49 (diff) | |
| download | rust-413703201c59f25a5a2fded13d7ee4b4be4e8545.tar.gz rust-413703201c59f25a5a2fded13d7ee4b4be4e8545.zip | |
Rollup merge of #100293 - yanchen4791:add-inline-llvm-option, r=nnethercote
Add inline-llvm option for disabling/enabling LLVM inlining In this PR, a new -Z option `inline-llvm` is added in order to be able to turn on/off LLVM inlining. The capability of turning on/off inlining in LLVM backend is needed for testing performance implications of using recently enabled inlining in rustc's frontend (with -Z inline-mir=yes option, #91743). It would be interesting to see the performance effect using rustc's frontend inlining only without LLVM inlining enabled. Currently LLVM is still doing inlining no mater what value inline-mir is set to. With the option `inline-llvm` being added in this PR, user can turn off LLVM inlining by using `-Z inline-llvm=no` option (the default of inline-llvm is 'yes', LLVM inlining enabled).
Diffstat (limited to 'compiler/rustc_codegen_llvm/src')
| -rw-r--r-- | compiler/rustc_codegen_llvm/src/attributes.rs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_llvm/src/attributes.rs b/compiler/rustc_codegen_llvm/src/attributes.rs index b38684a63e4..eff2436d41c 100644 --- a/compiler/rustc_codegen_llvm/src/attributes.rs +++ b/compiler/rustc_codegen_llvm/src/attributes.rs @@ -35,6 +35,10 @@ pub fn apply_to_callsite(callsite: &Value, idx: AttributePlace, attrs: &[&Attrib /// Get LLVM attribute for the provided inline heuristic. #[inline] fn inline_attr<'ll>(cx: &CodegenCx<'ll, '_>, inline: InlineAttr) -> Option<&'ll Attribute> { + if !cx.tcx.sess.opts.unstable_opts.inline_llvm { + // disable LLVM inlining + return Some(AttributeKind::NoInline.create_attr(cx.llcx)); + } match inline { InlineAttr::Hint => Some(AttributeKind::InlineHint.create_attr(cx.llcx)), InlineAttr::Always => Some(AttributeKind::AlwaysInline.create_attr(cx.llcx)), |