use x86-sse2 ABI for all applicable x86-32 targets

Author: RalfJung

compiler/rustc_target/src/spec/base/apple/mod.rs

@@ -2,8 +2,8 @@ use std::borrow::Cow;
 use std::env;
 
 use crate::spec::{
-    Cc, DebuginfoKind, FloatAbi, FramePointer, LinkerFlavor, Lld, SplitDebuginfo, StackProbeType,
-    StaticCow, TargetOptions, cvs,
+    Cc, DebuginfoKind, FloatAbi, FramePointer, LinkerFlavor, Lld, RustAbi, SplitDebuginfo,
+    StackProbeType, StaticCow, TargetOptions, cvs,
 };
 
 #[cfg(test)]
@@ -103,7 +103,7 @@ pub(crate) fn base(
     arch: Arch,
     abi: TargetAbi,
 ) -> (TargetOptions, StaticCow<str>, StaticCow<str>) {
-    let opts = TargetOptions {
+    let mut opts = TargetOptions {
         abi: abi.target_abi().into(),
         llvm_floatabi: Some(FloatAbi::Hard),
         os: os.into(),
@@ -154,6 +154,10 @@ pub(crate) fn base(
 
         ..Default::default()
     };
+    if matches!(arch, Arch::I386 | Arch::I686) {
+        // All Apple x86-32 targets have SSE2.
+        opts.rust_abi = Some(RustAbi::X86Sse2);
+    }
     (opts, unversioned_llvm_target(os, arch, abi), arch.target_arch())
 }
 

compiler/rustc_target/src/spec/targets/i586_pc_nto_qnx700.rs

@@ -1,4 +1,4 @@
-use crate::spec::{Cc, LinkerFlavor, Lld, StackProbeType, Target, TargetOptions, base};
+use crate::spec::{Cc, LinkerFlavor, Lld, RustAbi, StackProbeType, Target, TargetOptions, base};
 
 pub(crate) fn target() -> Target {
     Target {
@@ -15,6 +15,7 @@ pub(crate) fn target() -> Target {
             .into(),
         arch: "x86".into(),
         options: TargetOptions {
+            rust_abi: Some(RustAbi::X86Sse2),
             cpu: "pentium4".into(),
             max_atomic_width: Some(64),
             pre_link_args: TargetOptions::link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &[

compiler/rustc_target/src/spec/targets/i686_linux_android.rs

@@ -1,4 +1,4 @@
-use crate::spec::{SanitizerSet, StackProbeType, Target, TargetOptions, base};
+use crate::spec::{RustAbi, SanitizerSet, StackProbeType, Target, TargetOptions, base};
 
 // See https://developer.android.com/ndk/guides/abis.html#x86
 // for target ABI requirements.
@@ -8,6 +8,7 @@ pub(crate) fn target() -> Target {
 
     base.max_atomic_width = Some(64);
 
+    base.rust_abi = Some(RustAbi::X86Sse2);
     // https://developer.android.com/ndk/guides/abis.html#x86
     base.cpu = "pentiumpro".into();
     base.features = "+mmx,+sse,+sse2,+sse3,+ssse3".into();

compiler/rustc_target/src/spec/targets/i686_pc_windows_gnu.rs

@@ -1,7 +1,8 @@
-use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, Target, base};
+use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, RustAbi, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::windows_gnu::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.frame_pointer = FramePointer::Always; // Required for backtraces

compiler/rustc_target/src/spec/targets/i686_pc_windows_gnullvm.rs

@@ -1,7 +1,8 @@
-use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, Target, base};
+use crate::spec::{Cc, FramePointer, LinkerFlavor, Lld, RustAbi, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::windows_gnullvm::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.frame_pointer = FramePointer::Always; // Required for backtraces

compiler/rustc_target/src/spec/targets/i686_pc_windows_msvc.rs

@@ -1,7 +1,8 @@
-use crate::spec::{LinkerFlavor, Lld, SanitizerSet, Target, base};
+use crate::spec::{LinkerFlavor, Lld, RustAbi, SanitizerSet, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::windows_msvc::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.supported_sanitizers = SanitizerSet::ADDRESS;

compiler/rustc_target/src/spec/targets/i686_unknown_freebsd.rs

@@ -1,7 +1,8 @@
-use crate::spec::{Cc, LinkerFlavor, Lld, StackProbeType, Target, base};
+use crate::spec::{Cc, LinkerFlavor, Lld, RustAbi, StackProbeType, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::freebsd::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32", "-Wl,-znotext"]);

compiler/rustc_target/src/spec/targets/i686_unknown_haiku.rs

@@ -1,7 +1,8 @@
-use crate::spec::{Cc, LinkerFlavor, Lld, StackProbeType, Target, base};
+use crate::spec::{Cc, LinkerFlavor, Lld, RustAbi, StackProbeType, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::haiku::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32"]);

compiler/rustc_target/src/spec/targets/i686_unknown_netbsd.rs

@@ -1,7 +1,8 @@
-use crate::spec::{Cc, LinkerFlavor, Lld, StackProbeType, Target, TargetOptions, base};
+use crate::spec::{Cc, LinkerFlavor, Lld, RustAbi, StackProbeType, Target, TargetOptions, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::netbsd::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32"]);

compiler/rustc_target/src/spec/targets/i686_unknown_openbsd.rs

@@ -1,7 +1,8 @@
-use crate::spec::{Cc, LinkerFlavor, Lld, StackProbeType, Target, base};
+use crate::spec::{Cc, LinkerFlavor, Lld, RustAbi, StackProbeType, Target, base};
 
 pub(crate) fn target() -> Target {
     let mut base = base::openbsd::opts();
+    base.rust_abi = Some(RustAbi::X86Sse2);
     base.cpu = "pentium4".into();
     base.max_atomic_width = Some(64);
     base.add_pre_link_args(LinkerFlavor::Gnu(Cc::Yes, Lld::No), &["-m32", "-fuse-ld=lld"]);