4 files changed, 58 insertions, 0 deletions
diff --git a/src/test/ui/const_prop/ice-assert-fail-div-by-zero.rs b/src/test/ui/const_prop/ice-assert-fail-div-by-zero.rs
new file mode 100644
index 000000000..2afbf3432
--- /dev/null
+++ b/src/test/ui/const_prop/ice-assert-fail-div-by-zero.rs
@@ -0,0 +1,14 @@
+// check-pass
+
+// need to emit MIR, because const prop (which emits `unconditional_panic`) only runs if
+// the `optimized_mir` query is run, which it isn't in check-only mode.
+// compile-flags: --crate-type lib --emit=mir,link
+
+#![warn(unconditional_panic)]
+
+pub struct Fixed64(i64);
+
+// HACK: this test passes only because this is a const fn that is written to metadata
+pub const fn div(f: Fixed64) {
+    f.0 / 0; //~ WARN will panic at runtime
+}
diff --git a/src/test/ui/const_prop/ice-assert-fail-div-by-zero.stderr b/src/test/ui/const_prop/ice-assert-fail-div-by-zero.stderr
new file mode 100644
index 000000000..865c69c3c
--- /dev/null
+++ b/src/test/ui/const_prop/ice-assert-fail-div-by-zero.stderr
@@ -0,0 +1,14 @@
+warning: this operation will panic at runtime
+  --> $DIR/ice-assert-fail-div-by-zero.rs:13:5
+   |
+LL |     f.0 / 0;
+   |     ^^^^^^^ attempt to divide `_` by zero
+   |
+note: the lint level is defined here
+  --> $DIR/ice-assert-fail-div-by-zero.rs:7:9
+   |
+LL | #![warn(unconditional_panic)]
+   |         ^^^^^^^^^^^^^^^^^^^
+
+warning: 1 warning emitted
+
diff --git a/src/test/ui/const_prop/inline_spans.rs b/src/test/ui/const_prop/inline_spans.rs
new file mode 100644
index 000000000..504f27811
--- /dev/null
+++ b/src/test/ui/const_prop/inline_spans.rs
@@ -0,0 +1,15 @@
+// build-pass
+// compile-flags: -Zmir-opt-level=3
+// Overflow can't be detected by const prop
+// could only be detected after optimizations
+
+#![deny(warnings)]
+
+fn main() {
+    let _ = add(u8::MAX, 1);
+}
+
+#[inline(always)]
+fn add(x: u8, y: u8) -> u8 {
+    x + y
+}
diff --git a/src/test/ui/const_prop/inline_spans_lint_attribute.rs b/src/test/ui/const_prop/inline_spans_lint_attribute.rs
new file mode 100644
index 000000000..1db53d771
--- /dev/null
+++ b/src/test/ui/const_prop/inline_spans_lint_attribute.rs
@@ -0,0 +1,15 @@
+// Must be build-pass, because check-pass will not run const prop and thus not emit the lint anyway.
+// build-pass
+// compile-flags: -Zmir-opt-level=3
+
+#![deny(warnings)]
+
+fn main() {
+    #[allow(arithmetic_overflow)]
+    let _ = add(u8::MAX, 1);
+}
+
+#[inline(always)]
+fn add(x: u8, y: u8) -> u8 {
+    x + y
+}