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Fix handling of x18 in AArch64 inline assembly on ohos/trusty or with -Zfixed-x18
This commit is contained in:
Taiki Endo
parent
7db7489f9b
commit
687dc19cb6
@ -82,7 +82,12 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
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let mut clobber_abis = FxIndexMap::default();
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if let Some(asm_arch) = asm_arch {
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for (abi_name, abi_span) in &asm.clobber_abis {
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match asm::InlineAsmClobberAbi::parse(asm_arch, &self.tcx.sess.target, *abi_name) {
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match asm::InlineAsmClobberAbi::parse(
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asm_arch,
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&self.tcx.sess.target,
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&self.tcx.sess.unstable_target_features,
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*abi_name,
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) {
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Ok(abi) => {
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// If the abi was already in the list, emit an error
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match clobber_abis.get(&abi) {
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@ -476,7 +476,12 @@ impl<'tcx> InlineAssemblyGenerator<'_, 'tcx> {
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let mut new_slot = |x| new_slot_fn(&mut slot_size, x);
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// Allocate stack slots for saving clobbered registers
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let abi_clobber = InlineAsmClobberAbi::parse(self.arch, &self.tcx.sess.target, sym::C)
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let abi_clobber = InlineAsmClobberAbi::parse(
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self.arch,
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&self.tcx.sess.target,
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&self.tcx.sess.unstable_target_features,
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sym::C,
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)
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.unwrap()
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.clobbered_regs();
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for (i, reg) in self.registers.iter().enumerate().filter_map(|(i, r)| r.map(|r| (i, r))) {
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@ -1611,6 +1611,7 @@ symbols! {
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repr_simd,
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repr_transparent,
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require,
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reserve_x18: "reserve-x18",
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residual,
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result,
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result_ffi_guarantees,
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@ -1,7 +1,7 @@
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use std::fmt;
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use rustc_data_structures::fx::FxIndexSet;
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use rustc_span::Symbol;
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use rustc_span::{Symbol, sym};
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use super::{InlineAsmArch, InlineAsmType, ModifierInfo};
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use crate::spec::{RelocModel, Target};
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@ -71,18 +71,26 @@ impl AArch64InlineAsmRegClass {
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}
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}
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pub(crate) fn target_reserves_x18(target: &Target) -> bool {
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target.os == "android" || target.os == "fuchsia" || target.is_like_osx || target.is_like_windows
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pub(crate) fn target_reserves_x18(target: &Target, target_features: &FxIndexSet<Symbol>) -> bool {
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// See isX18ReservedByDefault in LLVM for targets reserve x18 by default:
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// https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/TargetParser/AArch64TargetParser.cpp#L102-L105
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// Note that +reserve-x18 is currently not set for the above targets.
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target.os == "android"
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|| target.os == "fuchsia"
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|| target.env == "ohos"
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|| target.is_like_osx
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|| target.is_like_windows
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|| target_features.contains(&sym::reserve_x18)
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}
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fn reserved_x18(
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_arch: InlineAsmArch,
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_reloc_model: RelocModel,
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_target_features: &FxIndexSet<Symbol>,
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target_features: &FxIndexSet<Symbol>,
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target: &Target,
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_is_clobber: bool,
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) -> Result<(), &'static str> {
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if target_reserves_x18(target) {
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if target_reserves_x18(target, target_features) {
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Err("x18 is a reserved register on this target")
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} else {
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Ok(())
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@ -941,6 +941,7 @@ impl InlineAsmClobberAbi {
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pub fn parse(
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arch: InlineAsmArch,
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target: &Target,
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target_features: &FxIndexSet<Symbol>,
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name: Symbol,
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) -> Result<Self, &'static [&'static str]> {
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let name = name.as_str();
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@ -963,11 +964,13 @@ impl InlineAsmClobberAbi {
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_ => Err(&["C", "system", "efiapi", "aapcs"]),
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},
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InlineAsmArch::AArch64 => match name {
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"C" | "system" | "efiapi" => Ok(if aarch64::target_reserves_x18(target) {
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"C" | "system" | "efiapi" => {
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Ok(if aarch64::target_reserves_x18(target, target_features) {
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InlineAsmClobberAbi::AArch64NoX18
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} else {
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InlineAsmClobberAbi::AArch64
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}),
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})
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}
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_ => Err(&["C", "system", "efiapi"]),
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},
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InlineAsmArch::Arm64EC => match name {
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@ -16,7 +16,6 @@ pub(crate) fn target() -> Target {
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data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32".into(),
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arch: "aarch64".into(),
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options: TargetOptions {
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features: "+reserve-x18".into(),
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mcount: "\u{1}_mcount".into(),
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stack_probes: StackProbeType::Inline,
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supported_sanitizers: SanitizerSet::ADDRESS
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@ -228,6 +228,12 @@ const AARCH64_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
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("rcpc3", Unstable(sym::aarch64_unstable_target_feature), &["rcpc2"]),
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// FEAT_RDM
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("rdm", Stable, &["neon"]),
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// This is needed for inline assembly, but shouldn't be stabilized as-is
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// since it should be enabled globally using -Zfixed-x18, not
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// #[target_feature].
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// Note that cfg(target_feature = "reserve-x18") is currently not set for
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// targets that reserve x18 by default.
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("reserve-x18", Unstable(sym::aarch64_unstable_target_feature), &[]),
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// FEAT_SB
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("sb", Stable, &[]),
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// FEAT_SHA1 & FEAT_SHA256
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51
tests/codegen/asm/aarch64-clobbers.rs
Normal file
51
tests/codegen/asm/aarch64-clobbers.rs
Normal file
@ -0,0 +1,51 @@
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//@ revisions: aarch64 aarch64_fixed_x18 aarch64_no_x18 aarch64_reserve_x18 arm64ec
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//@[aarch64] compile-flags: --target aarch64-unknown-linux-gnu
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//@[aarch64] needs-llvm-components: aarch64
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//@[aarch64_fixed_x18] compile-flags: --target aarch64-unknown-linux-gnu -Zfixed-x18
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//@[aarch64_fixed_x18] needs-llvm-components: aarch64
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//@[aarch64_no_x18] compile-flags: --target aarch64-pc-windows-msvc
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//@[aarch64_no_x18] needs-llvm-components: aarch64
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// aarch64-unknown-trusty uses aarch64-unknown-unknown-musl which doesn't
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// reserve x18 by default as llvm_target, and pass +reserve-x18 in target-spec.
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//@[aarch64_reserve_x18] compile-flags: --target aarch64-unknown-trusty
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//@[aarch64_reserve_x18] needs-llvm-components: aarch64
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//@[arm64ec] compile-flags: --target arm64ec-pc-windows-msvc
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//@[arm64ec] needs-llvm-components: aarch64
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// ignore-tidy-linelength
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#![crate_type = "rlib"]
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#![feature(no_core, rustc_attrs, lang_items)]
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#![no_core]
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#[lang = "sized"]
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trait Sized {}
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#[rustc_builtin_macro]
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macro_rules! asm {
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() => {};
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}
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// CHECK-LABEL: @cc_clobber
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// CHECK: call void asm sideeffect "", "~{cc}"()
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#[no_mangle]
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pub unsafe fn cc_clobber() {
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asm!("", options(nostack, nomem));
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}
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// CHECK-LABEL: @no_clobber
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// CHECK: call void asm sideeffect "", ""()
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#[no_mangle]
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pub unsafe fn no_clobber() {
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asm!("", options(nostack, nomem, preserves_flags));
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}
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// CHECK-LABEL: @clobber_abi
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// aarch64: asm sideeffect "", "={w0},={w1},={w2},={w3},={w4},={w5},={w6},={w7},={w8},={w9},={w10},={w11},={w12},={w13},={w14},={w15},={w16},={w17},={w18},={w30},={q0},={q1},={q2},={q3},={q4},={q5},={q6},={q7},={q8},={q9},={q10},={q11},={q12},={q13},={q14},={q15},={q16},={q17},={q18},={q19},={q20},={q21},={q22},={q23},={q24},={q25},={q26},={q27},={q28},={q29},={q30},={q31},~{p0},~{p1},~{p2},~{p3},~{p4},~{p5},~{p6},~{p7},~{p8},~{p9},~{p10},~{p11},~{p12},~{p13},~{p14},~{p15},~{ffr}"()
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// aarch64_fixed_x18: asm sideeffect "", "={w0},={w1},={w2},={w3},={w4},={w5},={w6},={w7},={w8},={w9},={w10},={w11},={w12},={w13},={w14},={w15},={w16},={w17},={w30},={q0},={q1},={q2},={q3},={q4},={q5},={q6},={q7},={q8},={q9},={q10},={q11},={q12},={q13},={q14},={q15},={q16},={q17},={q18},={q19},={q20},={q21},={q22},={q23},={q24},={q25},={q26},={q27},={q28},={q29},={q30},={q31},~{p0},~{p1},~{p2},~{p3},~{p4},~{p5},~{p6},~{p7},~{p8},~{p9},~{p10},~{p11},~{p12},~{p13},~{p14},~{p15},~{ffr}"()
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// aarch64_no_x18: asm sideeffect "", "={w0},={w1},={w2},={w3},={w4},={w5},={w6},={w7},={w8},={w9},={w10},={w11},={w12},={w13},={w14},={w15},={w16},={w17},={w30},={q0},={q1},={q2},={q3},={q4},={q5},={q6},={q7},={q8},={q9},={q10},={q11},={q12},={q13},={q14},={q15},={q16},={q17},={q18},={q19},={q20},={q21},={q22},={q23},={q24},={q25},={q26},={q27},={q28},={q29},={q30},={q31},~{p0},~{p1},~{p2},~{p3},~{p4},~{p5},~{p6},~{p7},~{p8},~{p9},~{p10},~{p11},~{p12},~{p13},~{p14},~{p15},~{ffr}"()
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// aarch64_reserve_x18: asm sideeffect "", "={w0},={w1},={w2},={w3},={w4},={w5},={w6},={w7},={w8},={w9},={w10},={w11},={w12},={w13},={w14},={w15},={w16},={w17},={w30},={q0},={q1},={q2},={q3},={q4},={q5},={q6},={q7},={q8},={q9},={q10},={q11},={q12},={q13},={q14},={q15},={q16},={q17},={q18},={q19},={q20},={q21},={q22},={q23},={q24},={q25},={q26},={q27},={q28},={q29},={q30},={q31},~{p0},~{p1},~{p2},~{p3},~{p4},~{p5},~{p6},~{p7},~{p8},~{p9},~{p10},~{p11},~{p12},~{p13},~{p14},~{p15},~{ffr}"()
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// arm64ec: asm sideeffect "", "={w0},={w1},={w2},={w3},={w4},={w5},={w6},={w7},={w8},={w9},={w10},={w11},={w12},={w15},={w16},={w17},={w30},={q0},={q1},={q2},={q3},={q4},={q5},={q6},={q7},={q8},={q9},={q10},={q11},={q12},={q13},={q14},={q15}"()
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#[no_mangle]
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pub unsafe fn clobber_abi() {
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asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags));
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}
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@ -1,36 +0,0 @@
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//@ assembly-output: emit-asm
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//@ compile-flags: --target arm64ec-pc-windows-msvc
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//@ needs-llvm-components: aarch64
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#![crate_type = "rlib"]
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#![feature(no_core, rustc_attrs, lang_items)]
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#![no_core]
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#[lang = "sized"]
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trait Sized {}
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#[rustc_builtin_macro]
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macro_rules! asm {
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() => {};
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}
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// CHECK-LABEL: @cc_clobber
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// CHECK: call void asm sideeffect "", "~{cc}"()
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#[no_mangle]
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pub unsafe fn cc_clobber() {
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asm!("", options(nostack, nomem));
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}
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// CHECK-LABEL: @no_clobber
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// CHECK: call void asm sideeffect "", ""()
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#[no_mangle]
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pub unsafe fn no_clobber() {
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asm!("", options(nostack, nomem, preserves_flags));
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}
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// CHECK-LABEL: @clobber_abi
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// CHECK: asm sideeffect "", "={w0},={w1},={w2},={w3},={w4},={w5},={w6},={w7},={w8},={w9},={w10},={w11},={w12},={w15},={w16},={w17},={w30},={q0},={q1},={q2},={q3},={q4},={q5},={q6},={q7},={q8},={q9},={q10},={q11},={q12},={q13},={q14},={q15}"()
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#[no_mangle]
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pub unsafe fn clobber_abi() {
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asm!("", clobber_abi("C"), options(nostack, nomem, preserves_flags));
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}
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@ -251,7 +251,7 @@ warning: unexpected `cfg` condition value: `zebra`
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LL | cfg!(target_feature = "zebra");
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_feature` are: `10e60`, `2e3`, `3e3r1`, `3e3r2`, `3e3r3`, `3e7`, `7e10`, `a`, `aclass`, `adx`, `aes`, `altivec`, `alu32`, `amx-bf16`, `amx-complex`, `amx-fp16`, `amx-int8`, `amx-tile`, `atomics`, `avx`, `avx2`, `avx512bf16`, `avx512bitalg`, `avx512bw`, `avx512cd`, `avx512dq`, `avx512f`, `avx512fp16`, `avx512ifma`, `avx512vbmi`, `avx512vbmi2`, `avx512vl`, `avx512vnni`, `avx512vp2intersect`, and `avx512vpopcntdq` and 251 more
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= note: expected values for `target_feature` are: `10e60`, `2e3`, `3e3r1`, `3e3r2`, `3e3r3`, `3e7`, `7e10`, `a`, `aclass`, `adx`, `aes`, `altivec`, `alu32`, `amx-bf16`, `amx-complex`, `amx-fp16`, `amx-int8`, `amx-tile`, `atomics`, `avx`, `avx2`, `avx512bf16`, `avx512bitalg`, `avx512bw`, `avx512cd`, `avx512dq`, `avx512f`, `avx512fp16`, `avx512ifma`, `avx512vbmi`, `avx512vbmi2`, `avx512vl`, `avx512vnni`, `avx512vp2intersect`, and `avx512vpopcntdq` and 252 more
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= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
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warning: 27 warnings emitted
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@ -174,7 +174,7 @@ warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
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LL | target_feature = "_UNEXPECTED_VALUE",
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: expected values for `target_feature` are: `10e60`, `2e3`, `3e3r1`, `3e3r2`, `3e3r3`, `3e7`, `7e10`, `a`, `aclass`, `adx`, `aes`, `altivec`, `alu32`, `amx-bf16`, `amx-complex`, `amx-fp16`, `amx-int8`, `amx-tile`, `atomics`, `avx`, `avx2`, `avx512bf16`, `avx512bitalg`, `avx512bw`, `avx512cd`, `avx512dq`, `avx512f`, `avx512fp16`, `avx512ifma`, `avx512vbmi`, `avx512vbmi2`, `avx512vl`, `avx512vnni`, `avx512vp2intersect`, `avx512vpopcntdq`, `avxifma`, `avxneconvert`, `avxvnni`, `avxvnniint16`, `avxvnniint8`, `backchain`, `bf16`, `bmi1`, `bmi2`, `bti`, `bulk-memory`, `c`, `cache`, `cmpxchg16b`, `crc`, `crt-static`, `cssc`, `d`, `d32`, `dit`, `doloop`, `dotprod`, `dpb`, `dpb2`, `dsp`, `dsp1e2`, `dspe60`, `e`, `e1`, `e2`, `ecv`, `edsp`, `elrw`, `ermsb`, `exception-handling`, `extended-const`, `f`, `f16c`, `f32mm`, `f64mm`, `faminmax`, `fcma`, `fdivdu`, `fhm`, `flagm`, `flagm2`, `float1e2`, `float1e3`, `float3e4`, `float7e60`, `floate1`, `fma`, `fp-armv8`, `fp16`, `fp64`, `fp8`, `fp8dot2`, `fp8dot4`, `fp8fma`, `fpuv2_df`, `fpuv2_sf`, `fpuv3_df`, `fpuv3_hf`, `fpuv3_hi`, `fpuv3_sf`, `frecipe`, `frintts`, `fxsr`, `gfni`, `hard-float`, `hard-float-abi`, `hard-tp`, `hbc`, `high-registers`, `hvx`, `hvx-length128b`, `hwdiv`, `i8mm`, `jsconv`, `lahfsahf`, `lasx`, `lbt`, `leoncasa`, `lor`, `lse`, `lse128`, `lse2`, `lsx`, `lut`, `lvz`, `lzcnt`, `m`, `mclass`, `mops`, `movbe`, `mp`, `mp1e2`, `msa`, `mte`, `multivalue`, `mutable-globals`, `neon`, `nontrapping-fptoint`, `nvic`, `paca`, `pacg`, `pan`, `partword-atomics`, `pauth-lr`, `pclmulqdq`, `pmuv3`, `popcnt`, `power10-vector`, `power8-altivec`, `power8-vector`, `power9-altivec`, `power9-vector`, `prfchw`, `quadword-atomics`, `rand`, `ras`, `rclass`, `rcpc`, `rcpc2`, `rcpc3`, `rdm`, `rdrand`, `rdseed`, `reference-types`, `relax`, `relaxed-simd`, `rtm`, `sb`, `sha`, `sha2`, `sha3`, `sha512`, `sign-ext`, `simd128`, `sm3`, `sm4`, `sme`, `sme-b16b16`, `sme-f16f16`, `sme-f64f64`, `sme-f8f16`, `sme-f8f32`, `sme-fa64`, `sme-i16i64`, `sme-lutv2`, `sme2`, `sme2p1`, `spe`, `ssbs`, `sse`, `sse2`, `sse3`, `sse4.1`, `sse4.2`, `sse4a`, `ssse3`, `ssve-fp8dot2`, `ssve-fp8dot4`, `ssve-fp8fma`, `sve`, `sve-b16b16`, `sve2`, `sve2-aes`, `sve2-bitperm`, `sve2-sha3`, `sve2-sm4`, `sve2p1`, `tail-call`, `tbm`, `thumb-mode`, `thumb2`, `tme`, `trust`, `trustzone`, `ual`, `unaligned-scalar-mem`, `v`, `v5te`, `v6`, `v6k`, `v6t2`, `v7`, `v8`, `v8.1a`, `v8.2a`, `v8.3a`, `v8.4a`, `v8.5a`, `v8.6a`, `v8.7a`, `v8.8a`, `v8.9a`, `v8plus`, `v9`, `v9.1a`, `v9.2a`, `v9.3a`, `v9.4a`, `v9.5a`, `v9a`, `vaes`, `vdsp2e60f`, `vdspv1`, `vdspv2`, `vector`, `vfp2`, `vfp3`, `vfp4`, `vh`, `virt`, `virtualization`, `vpclmulqdq`, `vsx`, `wfxt`, `wide-arithmetic`, `xop`, `xsave`, `xsavec`, `xsaveopt`, `xsaves`, `zaamo`, `zabha`, `zalrsc`, `zba`, `zbb`, `zbc`, `zbkb`, `zbkc`, `zbkx`, `zbs`, `zdinx`, `zfh`, `zfhmin`, `zfinx`, `zhinx`, `zhinxmin`, `zk`, `zkn`, `zknd`, `zkne`, `zknh`, `zkr`, `zks`, `zksed`, `zksh`, and `zkt`
|
||||
= note: expected values for `target_feature` are: `10e60`, `2e3`, `3e3r1`, `3e3r2`, `3e3r3`, `3e7`, `7e10`, `a`, `aclass`, `adx`, `aes`, `altivec`, `alu32`, `amx-bf16`, `amx-complex`, `amx-fp16`, `amx-int8`, `amx-tile`, `atomics`, `avx`, `avx2`, `avx512bf16`, `avx512bitalg`, `avx512bw`, `avx512cd`, `avx512dq`, `avx512f`, `avx512fp16`, `avx512ifma`, `avx512vbmi`, `avx512vbmi2`, `avx512vl`, `avx512vnni`, `avx512vp2intersect`, `avx512vpopcntdq`, `avxifma`, `avxneconvert`, `avxvnni`, `avxvnniint16`, `avxvnniint8`, `backchain`, `bf16`, `bmi1`, `bmi2`, `bti`, `bulk-memory`, `c`, `cache`, `cmpxchg16b`, `crc`, `crt-static`, `cssc`, `d`, `d32`, `dit`, `doloop`, `dotprod`, `dpb`, `dpb2`, `dsp`, `dsp1e2`, `dspe60`, `e`, `e1`, `e2`, `ecv`, `edsp`, `elrw`, `ermsb`, `exception-handling`, `extended-const`, `f`, `f16c`, `f32mm`, `f64mm`, `faminmax`, `fcma`, `fdivdu`, `fhm`, `flagm`, `flagm2`, `float1e2`, `float1e3`, `float3e4`, `float7e60`, `floate1`, `fma`, `fp-armv8`, `fp16`, `fp64`, `fp8`, `fp8dot2`, `fp8dot4`, `fp8fma`, `fpuv2_df`, `fpuv2_sf`, `fpuv3_df`, `fpuv3_hf`, `fpuv3_hi`, `fpuv3_sf`, `frecipe`, `frintts`, `fxsr`, `gfni`, `hard-float`, `hard-float-abi`, `hard-tp`, `hbc`, `high-registers`, `hvx`, `hvx-length128b`, `hwdiv`, `i8mm`, `jsconv`, `lahfsahf`, `lasx`, `lbt`, `leoncasa`, `lor`, `lse`, `lse128`, `lse2`, `lsx`, `lut`, `lvz`, `lzcnt`, `m`, `mclass`, `mops`, `movbe`, `mp`, `mp1e2`, `msa`, `mte`, `multivalue`, `mutable-globals`, `neon`, `nontrapping-fptoint`, `nvic`, `paca`, `pacg`, `pan`, `partword-atomics`, `pauth-lr`, `pclmulqdq`, `pmuv3`, `popcnt`, `power10-vector`, `power8-altivec`, `power8-vector`, `power9-altivec`, `power9-vector`, `prfchw`, `quadword-atomics`, `rand`, `ras`, `rclass`, `rcpc`, `rcpc2`, `rcpc3`, `rdm`, `rdrand`, `rdseed`, `reference-types`, `relax`, `relaxed-simd`, `reserve-x18`, `rtm`, `sb`, `sha`, `sha2`, `sha3`, `sha512`, `sign-ext`, `simd128`, `sm3`, `sm4`, `sme`, `sme-b16b16`, `sme-f16f16`, `sme-f64f64`, `sme-f8f16`, `sme-f8f32`, `sme-fa64`, `sme-i16i64`, `sme-lutv2`, `sme2`, `sme2p1`, `spe`, `ssbs`, `sse`, `sse2`, `sse3`, `sse4.1`, `sse4.2`, `sse4a`, `ssse3`, `ssve-fp8dot2`, `ssve-fp8dot4`, `ssve-fp8fma`, `sve`, `sve-b16b16`, `sve2`, `sve2-aes`, `sve2-bitperm`, `sve2-sha3`, `sve2-sm4`, `sve2p1`, `tail-call`, `tbm`, `thumb-mode`, `thumb2`, `tme`, `trust`, `trustzone`, `ual`, `unaligned-scalar-mem`, `v`, `v5te`, `v6`, `v6k`, `v6t2`, `v7`, `v8`, `v8.1a`, `v8.2a`, `v8.3a`, `v8.4a`, `v8.5a`, `v8.6a`, `v8.7a`, `v8.8a`, `v8.9a`, `v8plus`, `v9`, `v9.1a`, `v9.2a`, `v9.3a`, `v9.4a`, `v9.5a`, `v9a`, `vaes`, `vdsp2e60f`, `vdspv1`, `vdspv2`, `vector`, `vfp2`, `vfp3`, `vfp4`, `vh`, `virt`, `virtualization`, `vpclmulqdq`, `vsx`, `wfxt`, `wide-arithmetic`, `xop`, `xsave`, `xsavec`, `xsaveopt`, `xsaves`, `zaamo`, `zabha`, `zalrsc`, `zba`, `zbb`, `zbc`, `zbkb`, `zbkc`, `zbkx`, `zbs`, `zdinx`, `zfh`, `zfhmin`, `zfinx`, `zhinx`, `zhinxmin`, `zk`, `zkn`, `zknd`, `zkne`, `zknh`, `zkr`, `zks`, `zksed`, `zksh`, and `zkt`
|
||||
= note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
|
||||
|
||||
warning: unexpected `cfg` condition value: `_UNEXPECTED_VALUE`
|
||||
|
||||
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