Auto merge of rust-lang#113116 - nnethercote:codegen-opts, r=oli-obk

bors · bors · commit b51f77884658 · 2023-06-30T00:35:19.000Z
A mish-mash of micro-optimizations

These were aimed at speeding up LLVM codegen, but ended up affecting other places as well.

r? `@bjorn3`
diff --git a/src/debuginfo/line_info.rs b/src/debuginfo/line_info.rs
@@ -81,7 +81,7 @@ impl DebugContext {
 
         match tcx.sess.source_map().lookup_line(span.lo()) {
             Ok(SourceFileAndLine { sf: file, line }) => {
-                let line_pos = file.line_begin_pos(span.lo());
+                let line_pos = file.lines(|lines| lines[line]);
 
                 (
                     file,

Original file line number	Diff line number	Diff line change
`@@ -81,7 +81,7 @@ impl DebugContext {`
`81`	`81`
`82`	`82`	`match tcx.sess.source_map().lookup_line(span.lo()) {`
`83`	`83`	`Ok(SourceFileAndLine { sf: file, line }) => {`
`84`		`- let line_pos = file.line_begin_pos(span.lo());`
	`84`	`+ let line_pos = file.lines(\|lines\| lines[line]);`
`85`	`85`
`86`	`86`	`(`
`87`	`87`	`file,`