From a50bd7ca24aa752fee840e83f7090bbd23f3a158 Mon Sep 17 00:00:00 2001 From: Folkert de Vries Date: Sat, 7 Jun 2025 21:31:21 +0200 Subject: [PATCH] store `target.min_global_align` as an `Align` --- compiler/rustc_codegen_gcc/messages.ftl | 3 --- compiler/rustc_codegen_gcc/src/consts.rs | 10 ++----- compiler/rustc_codegen_gcc/src/errors.rs | 6 ----- compiler/rustc_codegen_llvm/messages.ftl | 6 ----- compiler/rustc_codegen_llvm/src/consts.rs | 26 ++++--------------- compiler/rustc_codegen_llvm/src/errors.rs | 12 --------- compiler/rustc_target/src/spec/json.rs | 21 +++++++++++++-- compiler/rustc_target/src/spec/mod.rs | 8 +++++- .../spec/targets/s390x_unknown_linux_gnu.rs | 4 +-- .../spec/targets/s390x_unknown_linux_musl.rs | 4 +-- 10 files changed, 37 insertions(+), 63 deletions(-) diff --git a/compiler/rustc_codegen_gcc/messages.ftl b/compiler/rustc_codegen_gcc/messages.ftl index 882fff8673a19..546bfc87b689c 100644 --- a/compiler/rustc_codegen_gcc/messages.ftl +++ b/compiler/rustc_codegen_gcc/messages.ftl @@ -2,9 +2,6 @@ codegen_gcc_unknown_ctarget_feature_prefix = unknown feature specified for `-Ctarget-feature`: `{$feature}` .note = features must begin with a `+` to enable or `-` to disable it -codegen_gcc_invalid_minimum_alignment = - invalid minimum global alignment: {$err} - codegen_gcc_forbidden_ctarget_feature = target feature `{$feature}` cannot be toggled with `-Ctarget-feature`: {$reason} diff --git a/compiler/rustc_codegen_gcc/src/consts.rs b/compiler/rustc_codegen_gcc/src/consts.rs index deb13ddf7558d..1690641a5bc07 100644 --- a/compiler/rustc_codegen_gcc/src/consts.rs +++ b/compiler/rustc_codegen_gcc/src/consts.rs @@ -18,7 +18,6 @@ use rustc_span::def_id::DefId; use crate::base; use crate::context::CodegenCx; -use crate::errors::InvalidMinimumAlignment; use crate::type_of::LayoutGccExt; fn set_global_alignment<'gcc, 'tcx>( @@ -29,13 +28,8 @@ fn set_global_alignment<'gcc, 'tcx>( // The target may require greater alignment for globals than the type does. // Note: GCC and Clang also allow `__attribute__((aligned))` on variables, // which can force it to be smaller. Rust doesn't support this yet. - if let Some(min) = cx.sess().target.min_global_align { - match Align::from_bits(min) { - Ok(min) => align = align.max(min), - Err(err) => { - cx.sess().dcx().emit_err(InvalidMinimumAlignment { err: err.to_string() }); - } - } + if let Some(min_global) = cx.sess().target.min_global_align { + align = Ord::max(align, min_global); } gv.set_alignment(align.bytes() as i32); } diff --git a/compiler/rustc_codegen_gcc/src/errors.rs b/compiler/rustc_codegen_gcc/src/errors.rs index 1b59b9ac169ab..ccd9abe380491 100644 --- a/compiler/rustc_codegen_gcc/src/errors.rs +++ b/compiler/rustc_codegen_gcc/src/errors.rs @@ -47,12 +47,6 @@ pub(crate) struct UnwindingInlineAsm { pub span: Span, } -#[derive(Diagnostic)] -#[diag(codegen_gcc_invalid_minimum_alignment)] -pub(crate) struct InvalidMinimumAlignment { - pub err: String, -} - #[derive(Diagnostic)] #[diag(codegen_gcc_copy_bitcode)] pub(crate) struct CopyBitcode { diff --git a/compiler/rustc_codegen_llvm/messages.ftl b/compiler/rustc_codegen_llvm/messages.ftl index 41391b096cca8..bda121c67fb62 100644 --- a/compiler/rustc_codegen_llvm/messages.ftl +++ b/compiler/rustc_codegen_llvm/messages.ftl @@ -19,12 +19,6 @@ codegen_llvm_from_llvm_diag = {$message} codegen_llvm_from_llvm_optimization_diag = {$filename}:{$line}:{$column} {$pass_name} ({$kind}): {$message} -codegen_llvm_invalid_minimum_alignment_not_power_of_two = - invalid minimum global alignment: {$align} is not power of 2 - -codegen_llvm_invalid_minimum_alignment_too_large = - invalid minimum global alignment: {$align} is too large - codegen_llvm_load_bitcode = failed to load bitcode of module "{$name}" codegen_llvm_load_bitcode_with_llvm_err = failed to load bitcode of module "{$name}": {$llvm_err} diff --git a/compiler/rustc_codegen_llvm/src/consts.rs b/compiler/rustc_codegen_llvm/src/consts.rs index 73def2711dc6b..a4492d76c3c59 100644 --- a/compiler/rustc_codegen_llvm/src/consts.rs +++ b/compiler/rustc_codegen_llvm/src/consts.rs @@ -1,8 +1,6 @@ use std::ops::Range; -use rustc_abi::{ - Align, AlignFromBytesError, HasDataLayout, Primitive, Scalar, Size, WrappingRange, -}; +use rustc_abi::{Align, HasDataLayout, Primitive, Scalar, Size, WrappingRange}; use rustc_codegen_ssa::common; use rustc_codegen_ssa::traits::*; use rustc_hir::LangItem; @@ -20,9 +18,7 @@ use rustc_middle::{bug, span_bug}; use tracing::{debug, instrument, trace}; use crate::common::{AsCCharPtr, CodegenCx}; -use crate::errors::{ - InvalidMinimumAlignmentNotPowerOfTwo, InvalidMinimumAlignmentTooLarge, SymbolAlreadyDefined, -}; +use crate::errors::SymbolAlreadyDefined; use crate::llvm::{self, True}; use crate::type_::Type; use crate::type_of::LayoutLlvmExt; @@ -149,22 +145,10 @@ fn set_global_alignment<'ll>(cx: &CodegenCx<'ll, '_>, gv: &'ll Value, mut align: // The target may require greater alignment for globals than the type does. // Note: GCC and Clang also allow `__attribute__((aligned))` on variables, // which can force it to be smaller. Rust doesn't support this yet. - if let Some(min) = cx.sess().target.min_global_align { - match Align::from_bits(min) { - Ok(min) => align = align.max(min), - Err(err) => match err { - AlignFromBytesError::NotPowerOfTwo(align) => { - cx.sess().dcx().emit_err(InvalidMinimumAlignmentNotPowerOfTwo { align }); - } - AlignFromBytesError::TooLarge(align) => { - cx.sess().dcx().emit_err(InvalidMinimumAlignmentTooLarge { align }); - } - }, - } - } - unsafe { - llvm::LLVMSetAlignment(gv, align.bytes() as u32); + if let Some(min_global) = cx.sess().target.min_global_align { + align = Ord::max(align, min_global); } + llvm::set_alignment(gv, align); } fn check_and_apply_linkage<'ll, 'tcx>( diff --git a/compiler/rustc_codegen_llvm/src/errors.rs b/compiler/rustc_codegen_llvm/src/errors.rs index ecf108f988f0d..eaafc68071291 100644 --- a/compiler/rustc_codegen_llvm/src/errors.rs +++ b/compiler/rustc_codegen_llvm/src/errors.rs @@ -57,18 +57,6 @@ pub(crate) struct SymbolAlreadyDefined<'a> { pub symbol_name: &'a str, } -#[derive(Diagnostic)] -#[diag(codegen_llvm_invalid_minimum_alignment_not_power_of_two)] -pub(crate) struct InvalidMinimumAlignmentNotPowerOfTwo { - pub align: u64, -} - -#[derive(Diagnostic)] -#[diag(codegen_llvm_invalid_minimum_alignment_too_large)] -pub(crate) struct InvalidMinimumAlignmentTooLarge { - pub align: u64, -} - #[derive(Diagnostic)] #[diag(codegen_llvm_sanitizer_memtag_requires_mte)] pub(crate) struct SanitizerMemtagRequiresMte; diff --git a/compiler/rustc_target/src/spec/json.rs b/compiler/rustc_target/src/spec/json.rs index 54b06d9f9b47a..039056a5a25a9 100644 --- a/compiler/rustc_target/src/spec/json.rs +++ b/compiler/rustc_target/src/spec/json.rs @@ -2,7 +2,7 @@ use std::borrow::Cow; use std::collections::BTreeMap; use std::str::FromStr; -use rustc_abi::ExternAbi; +use rustc_abi::{Align, AlignFromBytesError, ExternAbi}; use serde_json::Value; use super::{Target, TargetKind, TargetOptions, TargetWarnings}; @@ -57,6 +57,14 @@ impl Target { base.metadata.std = metadata.remove("std").and_then(|host| host.as_bool()); } + let alignment_error = |field_name: &str, error: AlignFromBytesError| -> String { + let msg = match error { + AlignFromBytesError::NotPowerOfTwo(_) => "not a power of 2 number of bytes", + AlignFromBytesError::TooLarge(_) => "too large", + }; + format!("`{}` bits is not a valid value for {field_name}: {msg}", error.align() * 8) + }; + let mut incorrect_type = vec![]; macro_rules! key { @@ -111,6 +119,15 @@ impl Target { base.$key_name = Some(s.into()); } } ); + ($key_name:ident, Option) => ( { + let name = (stringify!($key_name)).replace("_", "-"); + if let Some(b) = obj.remove(&name).and_then(|b| b.as_u64()) { + match Align::from_bits(b) { + Ok(align) => base.$key_name = Some(align), + Err(e) => return Err(alignment_error(&name, e)), + } + } + } ); ($key_name:ident, BinaryFormat) => ( { let name = (stringify!($key_name)).replace("_", "-"); obj.remove(&name).and_then(|f| f.as_str().and_then(|s| { @@ -617,7 +634,7 @@ impl Target { key!(crt_static_default, bool); key!(crt_static_respected, bool); key!(stack_probes, StackProbeType)?; - key!(min_global_align, Option); + key!(min_global_align, Option); key!(default_codegen_units, Option); key!(default_codegen_backend, Option>); key!(trap_unreachable, bool); diff --git a/compiler/rustc_target/src/spec/mod.rs b/compiler/rustc_target/src/spec/mod.rs index 6529c2d72c827..48da1f2fb06ce 100644 --- a/compiler/rustc_target/src/spec/mod.rs +++ b/compiler/rustc_target/src/spec/mod.rs @@ -1697,6 +1697,12 @@ impl ToJson for BinaryFormat { } } +impl ToJson for Align { + fn to_json(&self) -> Json { + self.bits().to_json() + } +} + macro_rules! supported_targets { ( $(($tuple:literal, $module:ident),)+ ) => { mod targets { @@ -2513,7 +2519,7 @@ pub struct TargetOptions { pub stack_probes: StackProbeType, /// The minimum alignment for global symbols. - pub min_global_align: Option, + pub min_global_align: Option, /// Default number of codegen units to use in debug mode pub default_codegen_units: Option, diff --git a/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs b/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs index e0d16a7bfa55b..cdcf7d62a3e2b 100644 --- a/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs +++ b/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs @@ -1,4 +1,4 @@ -use rustc_abi::Endian; +use rustc_abi::{Align, Endian}; use crate::spec::{SanitizerSet, StackProbeType, Target, TargetMetadata, base}; @@ -8,7 +8,7 @@ pub(crate) fn target() -> Target { // z10 is the oldest CPU supported by LLVM base.cpu = "z10".into(); base.max_atomic_width = Some(128); - base.min_global_align = Some(16); + base.min_global_align = Some(Align::from_bits(16).unwrap()); base.stack_probes = StackProbeType::Inline; base.supported_sanitizers = SanitizerSet::ADDRESS | SanitizerSet::LEAK | SanitizerSet::MEMORY | SanitizerSet::THREAD; diff --git a/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_musl.rs b/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_musl.rs index 47050c1f769e3..e9522ac760e1d 100644 --- a/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_musl.rs +++ b/compiler/rustc_target/src/spec/targets/s390x_unknown_linux_musl.rs @@ -1,4 +1,4 @@ -use rustc_abi::Endian; +use rustc_abi::{Align, Endian}; use crate::spec::{SanitizerSet, StackProbeType, Target, TargetMetadata, base}; @@ -8,7 +8,7 @@ pub(crate) fn target() -> Target { // z10 is the oldest CPU supported by LLVM base.cpu = "z10".into(); base.max_atomic_width = Some(128); - base.min_global_align = Some(16); + base.min_global_align = Some(Align::from_bits(16).unwrap()); base.static_position_independent_executables = true; base.stack_probes = StackProbeType::Inline; base.supported_sanitizers =