Auto merge of #145910 - saethlin:ignore-intrinsic-calls, r=<try>

rust-bors[bot] · web-flow · commit 0f272e5b0ae5 · 2025-08-27T18:45:54.000Z
Ignore intrinsic calls in cross-crate-inlining cost model
diff --git a/compiler/rustc_mir_transform/src/cross_crate_inline.rs b/compiler/rustc_mir_transform/src/cross_crate_inline.rs
@@ -135,7 +135,12 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> {
                     }
                 }
             }
-            TerminatorKind::Call { unwind, .. } => {
+            TerminatorKind::Call { ref func, unwind, .. } => {
+                if let Some((fn_def_id, _)) = func.const_fn_def() {
+                    if self.tcx.has_attr(fn_def_id, sym::rustc_intrinsic) {
+                        return;
+                    }
+                }
                 self.calls += 1;
                 if let UnwindAction::Cleanup(_) = unwind {
                     self.landing_pads += 1;

Original file line number	Diff line number	Diff line change
`@@ -135,7 +135,12 @@ impl<'tcx> Visitor<'tcx> for CostChecker<'_, 'tcx> {`
`135`	`135`	`}`
`136`	`136`	`}`
`137`	`137`	`}`
`138`		`- TerminatorKind::Call { unwind, .. } => {`
	`138`	`+ TerminatorKind::Call { ref func, unwind, .. } => {`
	`139`	`+ if let Some((fn_def_id, _)) = func.const_fn_def() {`
	`140`	`+ if self.tcx.has_attr(fn_def_id, sym::rustc_intrinsic) {`
	`141`	`+ return;`
	`142`	`+ }`
	`143`	`+ }`
`139`	`144`	`self.calls += 1;`
`140`	`145`	`if let UnwindAction::Cleanup(_) = unwind {`
`141`	`146`	`self.landing_pads += 1;`