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Revert machine outliner disabling on LLVM 13

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This commit is contained in:
liudingming 2021-08-28 14:45:24 +08:00
parent ac50a53359
commit bf2f6656bc
1 changed files with 7 additions and 6 deletions
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13
compiler/rustc_codegen_llvm/src/llvm_util.rs
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@ -89,13 +89,14 @@ unsafe fn configure_llvm(sess: &Session) {
add("-generate-arange-section", false);
}
// FIXME(nagisa): disable the machine outliner by default in LLVM versions 11, where it was
// introduced and up.
// Disable the machine outliner by default in LLVM versions 11 and LLVM
// version 12, where it leads to miscompilation.
//
// This should remain in place until https://reviews.llvm.org/D103167 is fixed. If LLVM
// has been upgraded since, consider adjusting the version check below to contain an upper
// bound.
if llvm_util::get_version() >= (11, 0, 0) {
// Ref:
// - https://github.com/rust-lang/rust/issues/85351
// - https://reviews.llvm.org/D103167
let llvm_version = llvm_util::get_version();
if llvm_version >= (11, 0, 0) && llvm_version < (13, 0, 0) {
add("-enable-machine-outliner=never", false);
}