[DO NOT MERGE] clone of PR 116641 with llvm-18 specific fixes

This is a clone of rust-lang#116641
with a few static asserts disabled, specifically to try and bootstrap
rustc with LLVM at HEAD.

This is just for preliminary testing, will drop this in favor of
rust-lang#116641 once ready.

Author: krasimirgg

compiler/rustc_ast/src/ast.rs

@@ -3185,9 +3185,9 @@ mod size_asserts {
     static_assert_size!(Impl, 136);
     static_assert_size!(Item, 136);
     static_assert_size!(ItemKind, 64);
-    static_assert_size!(LitKind, 24);
+    // static_assert_size!(LitKind, 32);
     static_assert_size!(Local, 72);
-    static_assert_size!(MetaItemLit, 40);
+    // static_assert_size!(MetaItemLit, 48);
     static_assert_size!(Param, 40);
     static_assert_size!(Pat, 72);
     static_assert_size!(Path, 24);

compiler/rustc_middle/src/mir/mod.rs

@@ -1585,13 +1585,13 @@ mod size_asserts {
     use super::*;
     use rustc_data_structures::static_assert_size;
     // tidy-alphabetical-start
-    static_assert_size!(BasicBlockData<'_>, 136);
+    // static_assert_size!(BasicBlockData<'_>, 136);
     static_assert_size!(LocalDecl<'_>, 40);
     static_assert_size!(SourceScopeData<'_>, 72);
     static_assert_size!(Statement<'_>, 32);
     static_assert_size!(StatementKind<'_>, 16);
-    static_assert_size!(Terminator<'_>, 104);
-    static_assert_size!(TerminatorKind<'_>, 88);
+    // static_assert_size!(Terminator<'_>, 104);
+    // static_assert_size!(TerminatorKind<'_>, 88);
     static_assert_size!(VarDebugInfo<'_>, 88);
     // tidy-alphabetical-end
 }

compiler/rustc_target/src/spec/x86_64_apple_darwin.rs

@@ -18,8 +18,8 @@ pub fn target() -> Target {
         // correctly, we do too.
         llvm_target: macos_llvm_target(arch).into(),
         pointer_width: 64,
-        data_layout: "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: arch.target_arch(),
         options: TargetOptions { mcount: "\u{1}mcount".into(), ..base },
     }

compiler/rustc_target/src/spec/x86_64_apple_ios.rs

@@ -9,8 +9,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: ios_sim_llvm_target(arch).into(),
         pointer_width: 64,
-        data_layout: "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: arch.target_arch(),
         options: TargetOptions {
             max_atomic_width: Some(128),

compiler/rustc_target/src/spec/x86_64_apple_ios_macabi.rs

@@ -12,8 +12,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: llvm_target.into(),
         pointer_width: 64,
-        data_layout: "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: arch.target_arch(),
         options: TargetOptions {
             max_atomic_width: Some(128),

compiler/rustc_target/src/spec/x86_64_apple_tvos.rs

@@ -6,8 +6,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: tvos_sim_llvm_target(arch).into(),
         pointer_width: 64,
-        data_layout: "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: arch.target_arch(),
         options: TargetOptions {
             max_atomic_width: Some(128),

compiler/rustc_target/src/spec/x86_64_apple_watchos_sim.rs

@@ -6,8 +6,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: watchos_sim_llvm_target(arch).into(),
         pointer_width: 64,
-        data_layout: "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: arch.target_arch(),
         options: TargetOptions {
             max_atomic_width: Some(128),

compiler/rustc_target/src/spec/x86_64_fortanix_unknown_sgx.rs

@@ -75,8 +75,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: "x86_64-elf".into(),
         pointer_width: 64,
-        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: "x86_64".into(),
         options: opts,
     }

compiler/rustc_target/src/spec/x86_64_linux_android.rs

@@ -14,8 +14,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: "x86_64-linux-android".into(),
         pointer_width: 64,
-        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: "x86_64".into(),
         options: TargetOptions { supported_sanitizers: SanitizerSet::ADDRESS, ..base },
     }

compiler/rustc_target/src/spec/x86_64_pc_nto_qnx710.rs

@@ -5,8 +5,8 @@ pub fn target() -> Target {
     Target {
         llvm_target: "x86_64-pc-unknown".into(),
         pointer_width: 64,
-        data_layout: "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-            .into(),
+        data_layout:
+            "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128".into(),
         arch: "x86_64".into(),
         options: TargetOptions {
             cpu: "x86-64".into(),