Auto merge of rust-lang#142675 - tmiasko:preserve-cache, r=oli-obk

bors · bors · commit 9972ebfcc2b1 · 2025-06-22T06:49:02.000Z
Preserve caches in a call to shrink_to_fit A small follow up to rust-lang#142542.
diff --git a/compiler/rustc_mir_transform/src/simplify.rs b/compiler/rustc_mir_transform/src/simplify.rs
@@ -82,7 +82,7 @@ pub(super) fn simplify_cfg<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
     remove_dead_blocks(body);
 
     // FIXME: Should probably be moved into some kind of pass manager
-    body.basic_blocks_mut().raw.shrink_to_fit();
+    body.basic_blocks.as_mut_preserves_cfg().shrink_to_fit();
 }
 
 impl<'tcx> crate::MirPass<'tcx> for SimplifyCfg {

Original file line number	Diff line number	Diff line change
`@@ -82,7 +82,7 @@ pub(super) fn simplify_cfg<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {`
`82`	`82`	`remove_dead_blocks(body);`
`83`	`83`
`84`	`84`	`// FIXME: Should probably be moved into some kind of pass manager`
`85`		`- body.basic_blocks_mut().raw.shrink_to_fit();`
	`85`	`+ body.basic_blocks.as_mut_preserves_cfg().shrink_to_fit();`
`86`	`86`	`}`
`87`	`87`
`88`	`88`	`impl<'tcx> crate::MirPass<'tcx> for SimplifyCfg {`