Merge ref 'ec3867107526' from rust-lang/rust

Pull recent changes from https://github.com/rust-lang/rust via Josh.

Upstream ref: ec38671075266e9cee0348701da2e133379e7c6c
Filtered ref: ed8e25574abf50600d9d2fd61eda90708ccce6c2
Upstream diff: https://github.com/rust-lang/rust/compare/3f1552a273e43e15f6ed240d00e1efdd6a53e65e...ec38671075266e9cee0348701da2e133379e7c6c

This merge was created using https://github.com/rust-lang/josh-sync.

1 files changed, 16 insertions, 20 deletions

diff --git a/compiler/rustc_codegen_llvm/src/back/write.rs b/compiler/rustc_codegen_llvm/src/back/write.rs
index 423f0da4878..c4881f0aafc 100644
--- a/compiler/rustc_codegen_llvm/src/back/write.rs
+++ b/compiler/rustc_codegen_llvm/src/back/write.rs
@@ -31,6 +31,7 @@ use rustc_span::{BytePos, InnerSpan, Pos, SpanData, SyntaxContext, sym};
 use rustc_target::spec::{CodeModel, FloatAbi, RelocModel, SanitizerSet, SplitDebuginfo, TlsModel};
 use tracing::{debug, trace};
 
+use crate::back::command_line_args::quote_command_line_args;
 use crate::back::lto::ThinBuffer;
 use crate::back::owned_target_machine::OwnedTargetMachine;
 use crate::back::profiling::{
@@ -249,23 +250,15 @@ pub(crate) fn target_machine_factory(
 
     let use_emulated_tls = matches!(sess.tls_model(), TlsModel::Emulated);
 
-    // copy the exe path, followed by path all into one buffer
-    // null terminating them so we can use them as null terminated strings
-    let args_cstr_buff = {
-        let mut args_cstr_buff: Vec<u8> = Vec::new();
-        let exe_path = std::env::current_exe().unwrap_or_default();
-        let exe_path_str = exe_path.into_os_string().into_string().unwrap_or_default();
-
-        args_cstr_buff.extend_from_slice(exe_path_str.as_bytes());
-        args_cstr_buff.push(0);
-
-        for arg in sess.expanded_args.iter() {
-            args_cstr_buff.extend_from_slice(arg.as_bytes());
-            args_cstr_buff.push(0);
-        }
-
-        args_cstr_buff
-    };
+    // Command-line information to be included in the target machine.
+    // This seems to only be used for embedding in PDB debuginfo files.
+    // FIXME(Zalathar): Maybe skip this for non-PDB targets?
+    let argv0 = std::env::current_exe()
+        .unwrap_or_default()
+        .into_os_string()
+        .into_string()
+        .unwrap_or_default();
+    let command_line_args = quote_command_line_args(&sess.expanded_args);
 
     let debuginfo_compression = sess.opts.debuginfo_compression.to_string();
     match sess.opts.debuginfo_compression {
@@ -323,7 +316,8 @@ pub(crate) fn target_machine_factory(
             &output_obj_file,
             &debuginfo_compression,
             use_emulated_tls,
-            &args_cstr_buff,
+            &argv0,
+            &command_line_args,
             use_wasm_eh,
         )
     })
@@ -574,7 +568,8 @@ pub(crate) unsafe fn llvm_optimize(
     // FIXME(ZuseZ4): In a future update we could figure out how to only optimize individual functions getting
     // differentiated.
 
-    let consider_ad = cfg!(llvm_enzyme) && config.autodiff.contains(&config::AutoDiff::Enable);
+    let consider_ad =
+        cfg!(feature = "llvm_enzyme") && config.autodiff.contains(&config::AutoDiff::Enable);
     let run_enzyme = autodiff_stage == AutodiffStage::DuringAD;
     let print_before_enzyme = config.autodiff.contains(&config::AutoDiff::PrintModBefore);
     let print_after_enzyme = config.autodiff.contains(&config::AutoDiff::PrintModAfter);
@@ -740,7 +735,8 @@ pub(crate) fn optimize(
 
         // If we know that we will later run AD, then we disable vectorization and loop unrolling.
         // Otherwise we pretend AD is already done and run the normal opt pipeline (=PostAD).
-        let consider_ad = cfg!(llvm_enzyme) && config.autodiff.contains(&config::AutoDiff::Enable);
+        let consider_ad =
+            cfg!(feature = "llvm_enzyme") && config.autodiff.contains(&config::AutoDiff::Enable);
         let autodiff_stage = if consider_ad { AutodiffStage::PreAD } else { AutodiffStage::PostAD };
         // The embedded bitcode is used to run LTO/ThinLTO.
         // The bitcode obtained during the `codegen` phase is no longer suitable for performing LTO.