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Auto merge of #79192 - tmiasko:naked-noinline, r=oli-obk

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Never inline naked functions

The `#[naked]` attribute disabled prologue / epilogue emission for the
function and it is responsibility of a developer to provide them. The
compiler is no position to inline such functions correctly.

Disable inlining of naked functions at LLVM and MIR level.

Closes #60919.
This commit is contained in:
bors 2020-11-20 06:01:49 +00:00
commit 5c45969502
4 changed files with 45 additions and 4 deletions
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5
compiler/rustc_mir/src/transform/inline.rs
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@ -254,6 +254,11 @@ impl Inliner<'tcx> {
self.tcx.sess.opts.debugging_opts.inline_mir_threshold
};
if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::NAKED) {
debug!("#[naked] present - not inlining");
return false;
}
if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::COLD) {
debug!("#[cold] present - not inlining");
return false;