Auto merge of #97012 - oli-obk:🦀_intrinsics, r=davidtwco

Add a query for checking whether a function is an intrinsic.

work towards #93145

This will reduce churn when we add more ways to declare intrinsics

r? `@scottmcm`

1 files changed, 1 insertions, 3 deletions

diff --git a/compiler/rustc_mir_dataflow/src/rustc_peek.rs b/compiler/rustc_mir_dataflow/src/rustc_peek.rs
index cc9ee1016c6..2f884887ad9 100644
--- a/compiler/rustc_mir_dataflow/src/rustc_peek.rs
+++ b/compiler/rustc_mir_dataflow/src/rustc_peek.rs
@@ -1,6 +1,5 @@
 use rustc_span::symbol::sym;
 use rustc_span::Span;
-use rustc_target::spec::abi::Abi;
 
 use rustc_index::bit_set::BitSet;
 use rustc_middle::mir::MirPass;
@@ -193,9 +192,8 @@ impl PeekCall {
             &terminator.kind
         {
             if let ty::FnDef(def_id, substs) = *func.literal.ty().kind() {
-                let sig = tcx.fn_sig(def_id);
                 let name = tcx.item_name(def_id);
-                if sig.abi() != Abi::RustIntrinsic || name != sym::rustc_peek {
+                if !tcx.is_intrinsic(def_id) || name != sym::rustc_peek {
                     return None;
                 }