Rollup of 8 pull requests

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -881,7 +881,6 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                         &item.vis,
                         errors::VisibilityNotPermittedNote::TraitImpl,
                     );
-                    // njn: use Dummy here
                     if let TyKind::Err(_) = self_ty.kind {
                         this.dcx().emit_err(errors::ObsoleteAuto { span: item.span });
                     }

compiler/rustc_codegen_gcc/src/builder.rs

@@ -1727,7 +1727,7 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
         self.vector_reduce(src, |a, b, context| context.new_binary_op(None, op, a.get_type(), a, b))
     }
 
-    pub fn vector_reduce_fadd_fast(&mut self, _acc: RValue<'gcc>, _src: RValue<'gcc>) -> RValue<'gcc> {
+    pub fn vector_reduce_fadd_reassoc(&mut self, _acc: RValue<'gcc>, _src: RValue<'gcc>) -> RValue<'gcc> {
         unimplemented!();
     }
 
@@ -1747,7 +1747,7 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
         unimplemented!();
     }
 
-    pub fn vector_reduce_fmul_fast(&mut self, _acc: RValue<'gcc>, _src: RValue<'gcc>) -> RValue<'gcc> {
+    pub fn vector_reduce_fmul_reassoc(&mut self, _acc: RValue<'gcc>, _src: RValue<'gcc>) -> RValue<'gcc> {
         unimplemented!();
     }
 

compiler/rustc_codegen_gcc/src/intrinsic/simd.rs

@@ -989,14 +989,14 @@ pub fn generic_simd_intrinsic<'a, 'gcc, 'tcx>(
 
     arith_red!(
         simd_reduce_add_unordered: BinaryOp::Plus,
-        vector_reduce_fadd_fast,
+        vector_reduce_fadd_reassoc,
         false,
         add,
         0.0 // TODO: Use this argument.
     );
     arith_red!(
         simd_reduce_mul_unordered: BinaryOp::Mult,
-        vector_reduce_fmul_fast,
+        vector_reduce_fmul_reassoc,
         false,
         mul,
         1.0

compiler/rustc_codegen_llvm/src/builder.rs

@@ -1327,17 +1327,17 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
     pub fn vector_reduce_fmul(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
         unsafe { llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src) }
     }
-    pub fn vector_reduce_fadd_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
+    pub fn vector_reduce_fadd_reassoc(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
         unsafe {
             let instr = llvm::LLVMRustBuildVectorReduceFAdd(self.llbuilder, acc, src);
-            llvm::LLVMRustSetFastMath(instr);
+            llvm::LLVMRustSetAllowReassoc(instr);
             instr
         }
     }
-    pub fn vector_reduce_fmul_fast(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
+    pub fn vector_reduce_fmul_reassoc(&mut self, acc: &'ll Value, src: &'ll Value) -> &'ll Value {
         unsafe {
             let instr = llvm::LLVMRustBuildVectorReduceFMul(self.llbuilder, acc, src);
-            llvm::LLVMRustSetFastMath(instr);
+            llvm::LLVMRustSetAllowReassoc(instr);
             instr
         }
     }

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -1880,14 +1880,14 @@ fn generic_simd_intrinsic<'ll, 'tcx>(
     arith_red!(simd_reduce_mul_ordered: vector_reduce_mul, vector_reduce_fmul, true, mul, 1.0);
     arith_red!(
         simd_reduce_add_unordered: vector_reduce_add,
-        vector_reduce_fadd_fast,
+        vector_reduce_fadd_reassoc,
         false,
         add,
         0.0
     );
     arith_red!(
         simd_reduce_mul_unordered: vector_reduce_mul,
-        vector_reduce_fmul_fast,
+        vector_reduce_fmul_reassoc,
         false,
         mul,
         1.0

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -1618,6 +1618,7 @@ extern "C" {
     ) -> &'a Value;
 
     pub fn LLVMRustSetFastMath(Instr: &Value);
+    pub fn LLVMRustSetAllowReassoc(Instr: &Value);
 
     // Miscellaneous instructions
     pub fn LLVMRustGetInstrProfIncrementIntrinsic(M: &Module) -> &Value;

compiler/rustc_codegen_ssa/src/back/link.rs

@@ -3,7 +3,7 @@ use rustc_ast::CRATE_NODE_ID;
 use rustc_data_structures::fx::{FxIndexMap, FxIndexSet};
 use rustc_data_structures::memmap::Mmap;
 use rustc_data_structures::temp_dir::MaybeTempDir;
-use rustc_errors::{DiagCtxt, ErrorGuaranteed};
+use rustc_errors::{DiagCtxt, ErrorGuaranteed, FatalError};
 use rustc_fs_util::{fix_windows_verbatim_for_gcc, try_canonicalize};
 use rustc_hir::def_id::{CrateNum, LOCAL_CRATE};
 use rustc_metadata::find_native_static_library;
@@ -487,7 +487,9 @@ fn collate_raw_dylibs<'a, 'b>(
             }
         }
     }
-    sess.compile_status()?;
+    if let Some(guar) = sess.dcx().has_errors() {
+        return Err(guar);
+    }
     Ok(dylib_table
         .into_iter()
         .map(|(name, imports)| {
@@ -720,10 +722,7 @@ fn link_dwarf_object<'a>(
         Ok(())
     }) {
         Ok(()) => {}
-        Err(e) => {
-            sess.dcx().emit_err(errors::ThorinErrorWrapper(e));
-            sess.dcx().abort_if_errors();
-        }
+        Err(e) => sess.dcx().emit_fatal(errors::ThorinErrorWrapper(e)),
     }
 }
 
@@ -999,7 +998,7 @@ fn link_natively<'a>(
                 sess.dcx().emit_note(errors::CheckInstalledVisualStudio);
                 sess.dcx().emit_note(errors::InsufficientVSCodeProduct);
             }
-            sess.dcx().abort_if_errors();
+            FatalError.raise();
         }
     }
 

compiler/rustc_codegen_ssa/src/base.rs

@@ -449,10 +449,7 @@ pub fn maybe_create_entry_wrapper<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
         let Some(llfn) = cx.declare_c_main(llfty) else {
             // FIXME: We should be smart and show a better diagnostic here.
             let span = cx.tcx().def_span(rust_main_def_id);
-            let dcx = cx.tcx().dcx();
-            dcx.emit_err(errors::MultipleMainFunctions { span });
-            dcx.abort_if_errors();
-            bug!();
+            cx.tcx().dcx().emit_fatal(errors::MultipleMainFunctions { span });
         };
 
         // `main` should respect same config for frame pointer elimination as rest of code

compiler/rustc_driver_impl/src/lib.rs

@@ -144,16 +144,6 @@ pub const EXIT_FAILURE: i32 = 1;
 pub const DEFAULT_BUG_REPORT_URL: &str = "https://github.com/rust-lang/rust/issues/new\
     ?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md";
 
-pub fn abort_on_err<T>(result: Result<T, ErrorGuaranteed>, sess: &Session) -> T {
-    match result {
-        Err(..) => {
-            sess.dcx().abort_if_errors();
-            panic!("error reported but abort_if_errors didn't abort???");
-        }
-        Ok(x) => x,
-    }
-}
-
 pub trait Callbacks {
     /// Called before creating the compiler instance
     fn config(&mut self, _config: &mut interface::Config) {}
@@ -349,27 +339,33 @@ fn run_compiler(
         },
     };
 
-    callbacks.config(&mut config);
-
-    default_early_dcx.abort_if_errors();
     drop(default_early_dcx);
 
+    callbacks.config(&mut config);
+
     interface::run_compiler(config, |compiler| {
         let sess = &compiler.sess;
         let codegen_backend = &*compiler.codegen_backend;
 
+        // This is used for early exits unrelated to errors. E.g. when just
+        // printing some information without compiling, or exiting immediately
+        // after parsing, etc.
+        let early_exit = || {
+            if let Some(guar) = sess.dcx().has_errors() { Err(guar) } else { Ok(()) }
+        };
+
         // This implements `-Whelp`. It should be handled very early, like
         // `--help`/`-Zhelp`/`-Chelp`. This is the earliest it can run, because
         // it must happen after lints are registered, during session creation.
         if sess.opts.describe_lints {
             describe_lints(sess);
-            return sess.compile_status();
+            return early_exit();
         }
 
         let early_dcx = EarlyDiagCtxt::new(sess.opts.error_format);
 
         if print_crate_info(&early_dcx, codegen_backend, sess, has_input) == Compilation::Stop {
-            return sess.compile_status();
+            return early_exit();
         }
 
         if !has_input {
@@ -378,16 +374,16 @@ fn run_compiler(
 
         if !sess.opts.unstable_opts.ls.is_empty() {
             list_metadata(&early_dcx, sess, &*codegen_backend.metadata_loader());
-            return sess.compile_status();
+            return early_exit();
         }
 
         if sess.opts.unstable_opts.link_only {
             process_rlink(sess, compiler);
-            return sess.compile_status();
+            return early_exit();
         }
 
         let linker = compiler.enter(|queries| {
-            let early_exit = || sess.compile_status().map(|_| None);
+            let early_exit = || early_exit().map(|_| None);
             queries.parse()?;
 
             if let Some(ppm) = &sess.opts.pretty {
@@ -659,10 +655,11 @@ fn process_rlink(sess: &Session, compiler: &interface::Compiler) {
                 };
             }
         };
-        let result = compiler.codegen_backend.link(sess, codegen_results, &outputs);
-        abort_on_err(result, sess);
+        if compiler.codegen_backend.link(sess, codegen_results, &outputs).is_err() {
+            FatalError.raise();
+        }
     } else {
-        dcx.emit_fatal(RlinkNotAFile {})
+        dcx.emit_fatal(RlinkNotAFile {});
     }
 }
 

compiler/rustc_driver_impl/src/pretty.rs

@@ -2,6 +2,7 @@
 
 use rustc_ast as ast;
 use rustc_ast_pretty::pprust as pprust_ast;
+use rustc_errors::FatalError;
 use rustc_hir as hir;
 use rustc_hir_pretty as pprust_hir;
 use rustc_middle::bug;
@@ -18,7 +19,6 @@ use std::fmt::Write;
 
 pub use self::PpMode::*;
 pub use self::PpSourceMode::*;
-use crate::abort_on_err;
 
 struct AstNoAnn;
 
@@ -243,7 +243,9 @@ impl<'tcx> PrintExtra<'tcx> {
 
 pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
     if ppm.needs_analysis() {
-        abort_on_err(ex.tcx().analysis(()), sess);
+        if ex.tcx().analysis(()).is_err() {
+            FatalError.raise();
+        }
     }
 
     let (src, src_name) = get_source(sess);
@@ -334,7 +336,9 @@ pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
         ThirTree => {
             let tcx = ex.tcx();
             let mut out = String::new();
-            abort_on_err(rustc_hir_analysis::check_crate(tcx), tcx.sess);
+            if rustc_hir_analysis::check_crate(tcx).is_err() {
+                FatalError.raise();
+            }
             debug!("pretty printing THIR tree");
             for did in tcx.hir().body_owners() {
                 let _ = writeln!(out, "{:?}:\n{}\n", did, tcx.thir_tree(did));
@@ -344,7 +348,9 @@ pub fn print<'tcx>(sess: &Session, ppm: PpMode, ex: PrintExtra<'tcx>) {
         ThirFlat => {
             let tcx = ex.tcx();
             let mut out = String::new();
-            abort_on_err(rustc_hir_analysis::check_crate(tcx), tcx.sess);
+            if rustc_hir_analysis::check_crate(tcx).is_err() {
+                FatalError.raise();
+            }
             debug!("pretty printing THIR flat");
             for did in tcx.hir().body_owners() {
                 let _ = writeln!(out, "{:?}:\n{}\n", did, tcx.thir_flat(did));