meow

slides/2025-10-10-how-rust-compiles/index.html

@@ -584,6 +584,41 @@ fn main() { math::add() }
             - annoying to set up
           </textarea>
         </section>
+        <section data-markdown>
+          <textarea data-template>
+            ## inlining across codegen units in the same crate
+
+            - ThinLTO across different codegen units by default
+          </textarea>
+        </section>
+        <section data-markdown>
+          <textarea data-template>
+            ## `Cargo.toml` config
+
+            ```toml
+            [profile.release]
+            lto = "thin"
+            codegen-units = 1
+            ```
+          </textarea>
+        </section>
+        <section data-markdown>
+          <textarea data-template>
+            ## and why did `#[inline]` make the error go away?
+
+            ```rust
+            pub fn error() {
+                //           vvvvvvvvvvv post-mono error!
+                let _x: [u8; usize::MAX] = [0; usize::MAX];
+            }
+            ```
+          </textarea>
+        </section>
+        <section data-markdown>
+          <textarea data-template>
+            ## happy compiling
+          </textarea>
+        </section>
       </div>
     </div>
 

slides/speaker-notes.md

@@ -18,7 +18,6 @@
     - resolve, typecheck
 - MIR
     - intermediate representation
-    - CFG
     - borrow checker
 - LLVM IR
     - LLVM backend
@@ -71,6 +70,7 @@
     - dont always use it because its slow
     - dont forget about it
     - benchmark
+    - todo
 - if you dont want to worry about this as an application
 - LTO
     - no cross-crate-inline-threshold
@@ -98,4 +98,4 @@
     - not by rustc, but by the linker
     - across languages
     - LLVM IR from Rust, LLVM IR from clang
-    - annoying to set up
+    - annoying to set up