Insert builtin#asm into asm! expansion

Author: Veykril

crates/hir-def/src/body/lower.rs

@@ -30,8 +30,8 @@ use crate::{
     expander::Expander,
     hir::{
         dummy_expr_id, Array, Binding, BindingAnnotation, BindingId, BindingProblems, CaptureBy,
-        ClosureKind, Expr, ExprId, Label, LabelId, Literal, LiteralOrConst, MatchArm, Movability,
-        OffsetOf, Pat, PatId, RecordFieldPat, RecordLitField, Statement,
+        ClosureKind, Expr, ExprId, InlineAsm, Label, LabelId, Literal, LiteralOrConst, MatchArm,
+        Movability, OffsetOf, Pat, PatId, RecordFieldPat, RecordLitField, Statement,
     },
     item_scope::BuiltinShadowMode,
     lang_item::LangItem,
@@ -648,7 +648,10 @@ impl ExprCollector<'_> {
                 }
             }
             ast::Expr::UnderscoreExpr(_) => self.alloc_expr(Expr::Underscore, syntax_ptr),
-            ast::Expr::AsmExpr(_) => self.missing_expr(),
+            ast::Expr::AsmExpr(e) => {
+                let expr = Expr::InlineAsm(InlineAsm { e: self.collect_expr_opt(e.expr()) });
+                self.alloc_expr(expr, syntax_ptr)
+            }
             ast::Expr::OffsetOfExpr(e) => {
                 let container = Interned::new(TypeRef::from_ast_opt(&self.ctx(), e.ty()));
                 let fields = e.fields().map(|it| it.as_name()).collect();

crates/hir-def/src/body/pretty.rs

@@ -155,8 +155,9 @@ impl Printer<'_> {
         match expr {
             Expr::Missing => w!(self, "�"),
             Expr::Underscore => w!(self, "_"),
+            Expr::InlineAsm(_) => w!(self, "builtin#asm(_)"),
             Expr::OffsetOf(offset_of) => {
-                w!(self, "builtin#offset_of!(");
+                w!(self, "builtin#offset_of(");
                 self.print_type_ref(&offset_of.container);
                 w!(
                     self,

crates/hir-def/src/hir.rs

@@ -282,6 +282,7 @@ pub enum Expr {
     Literal(Literal),
     Underscore,
     OffsetOf(OffsetOf),
+    InlineAsm(InlineAsm),
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -290,6 +291,11 @@ pub struct OffsetOf {
     pub fields: Box<[Name]>,
 }
 
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct InlineAsm {
+    pub e: ExprId,
+}
+
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum ClosureKind {
     Closure,
@@ -349,6 +355,7 @@ impl Expr {
         match self {
             Expr::Missing => {}
             Expr::Path(_) | Expr::OffsetOf(_) => {}
+            Expr::InlineAsm(e) => f(e.e),
             Expr::If { condition, then_branch, else_branch } => {
                 f(*condition);
                 f(*then_branch);

crates/hir-ty/src/infer/closure.rs

@@ -453,6 +453,7 @@ impl InferenceContext<'_> {
     fn walk_expr_without_adjust(&mut self, tgt_expr: ExprId) {
         match &self.body[tgt_expr] {
             Expr::OffsetOf(_) => (),
+            Expr::InlineAsm(e) => self.walk_expr_without_adjust(e.e),
             Expr::If { condition, then_branch, else_branch } => {
                 self.consume_expr(*condition);
                 self.consume_expr(*then_branch);

crates/hir-ty/src/infer/expr.rs

@@ -844,6 +844,10 @@ impl InferenceContext<'_> {
                 expected
             }
             Expr::OffsetOf(_) => TyKind::Scalar(Scalar::Uint(UintTy::Usize)).intern(Interner),
+            Expr::InlineAsm(it) => {
+                self.infer_expr_no_expect(it.e);
+                self.result.standard_types.unit.clone()
+            }
         };
         // use a new type variable if we got unknown here
         let ty = self.insert_type_vars_shallow(ty);

crates/hir-ty/src/infer/mutability.rs

@@ -35,6 +35,7 @@ impl InferenceContext<'_> {
     fn infer_mut_expr_without_adjust(&mut self, tgt_expr: ExprId, mutability: Mutability) {
         match &self.body[tgt_expr] {
             Expr::Missing => (),
+            Expr::InlineAsm(e) => self.infer_mut_expr_without_adjust(e.e, Mutability::Not),
             Expr::OffsetOf(_) => (),
             &Expr::If { condition, then_branch, else_branch } => {
                 self.infer_mut_expr(condition, Mutability::Not);

crates/hir-ty/src/mir/lower.rs

@@ -373,6 +373,9 @@ impl<'ctx> MirLowerCtx<'ctx> {
             Expr::OffsetOf(_) => {
                 not_supported!("builtin#offset_of")
             }
+            Expr::InlineAsm(_) => {
+                not_supported!("builtin#asm")
+            }
             Expr::Missing => {
                 if let DefWithBodyId::FunctionId(f) = self.owner {
                     let assoc = f.lookup(self.db.upcast());

crates/ide/src/syntax_highlighting/test_data/highlight_strings.html

@@ -176,7 +176,15 @@
     <span class="macro">assert</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="bool_literal macro">true</span><span class="comma macro">,</span> <span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="macro">assert</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="bool_literal macro">true</span><span class="comma macro">,</span> <span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> asdasd"</span><span class="comma macro">,</span> <span class="numeric_literal macro">1</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="macro">toho</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">fmt"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
-    <span class="macro unsafe">asm</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"mov eax, </span><span class="format_specifier">{</span><span class="numeric_literal">0</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable declaration">i</span><span class="colon">:</span> <span class="builtin_type">u64</span> <span class="operator">=</span> <span class="numeric_literal">3</span><span class="semicolon">;</span>
+    <span class="keyword">let</span> <span class="variable declaration">o</span><span class="colon">:</span> <span class="builtin_type">u64</span><span class="semicolon">;</span>
+    <span class="macro unsafe">asm</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span>
+        <span class="string_literal macro">"mov </span><span class="format_specifier">{</span><span class="numeric_literal">0</span><span class="format_specifier">}</span><span class="string_literal macro">, </span><span class="format_specifier">{</span><span class="numeric_literal">1</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span>
+        <span class="string_literal macro">"add </span><span class="format_specifier">{</span><span class="numeric_literal">0</span><span class="format_specifier">}</span><span class="string_literal macro">, 5"</span><span class="comma macro">,</span>
+        <span class="none macro">out</span><span class="parenthesis macro">(</span><span class="none macro">reg</span><span class="parenthesis macro">)</span> <span class="none macro">o</span><span class="comma macro">,</span>
+        <span class="keyword control macro">in</span><span class="parenthesis macro">(</span><span class="none macro">reg</span><span class="parenthesis macro">)</span> <span class="none macro">i</span><span class="comma macro">,</span>
+    <span class="parenthesis macro">)</span><span class="semicolon">;</span>
+
     <span class="macro">format_args</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="none macro">concat</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="string_literal macro">"{}"</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
     <span class="macro">format_args</span><span class="macro_bang">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro"> </span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="variable macro reference">backslash</span><span class="comma macro">,</span> <span class="none macro">format_args</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="string_literal macro">"</span><span class="format_specifier">{</span><span class="format_specifier">}</span><span class="string_literal macro">"</span><span class="comma macro">,</span> <span class="numeric_literal macro">0</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="unresolved_reference macro">foo</span><span class="comma macro">,</span> <span class="string_literal macro">"bar"</span><span class="comma macro">,</span> <span class="none macro">toho</span><span class="punctuation macro">!</span><span class="parenthesis macro">(</span><span class="parenthesis macro">)</span><span class="comma macro">,</span> <span class="variable macro reference">backslash</span><span class="parenthesis macro">)</span><span class="semicolon">;</span>
 <span class="brace">}</span></code></pre>

crates/parser/src/grammar/expressions/atom.rs

@@ -254,6 +254,7 @@ fn builtin_expr(p: &mut Parser<'_>) -> Option<CompletedMarker> {
     } else if p.at_contextual_kw(T![asm]) {
         p.bump_remap(T![asm]);
         p.expect(T!['(']);
+        // FIXME: We just put expression here so highlighting kind of keeps working
         expr(p);
         p.expect(T![')']);
         Some(m.complete(p, ASM_EXPR))

crates/syntax/rust.ungram

@@ -379,7 +379,7 @@ OffsetOfExpr =
   Attr* 'builtin' '#' 'offset_of' '(' Type ',' fields:(NameRef ('.' NameRef)* ) ')'
 
 AsmExpr =
-  Attr* 'builtin' '#' 'asm' '(' ')'
+  Attr* 'builtin' '#' 'asm' '(' Expr ')'
 
 FormatArgsExpr =
   Attr* 'builtin' '#' 'format_args' '(' ')'

crates/syntax/src/ast/generated/nodes.rs

@@ -814,6 +814,7 @@ impl AsmExpr {
     pub fn pound_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![#]) }
     pub fn asm_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![asm]) }
     pub fn l_paren_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T!['(']) }
+    pub fn expr(&self) -> Option<Expr> { support::child(&self.syntax) }
     pub fn r_paren_token(&self) -> Option<SyntaxToken> { support::token(&self.syntax, T![')']) }
 }