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-rw-r--r--tests/codegen/issue-75546.rs15
1 files changed, 15 insertions, 0 deletions
diff --git a/tests/codegen/issue-75546.rs b/tests/codegen/issue-75546.rs
new file mode 100644
index 000000000..470a9e040
--- /dev/null
+++ b/tests/codegen/issue-75546.rs
@@ -0,0 +1,15 @@
+// compile-flags: -O
+#![crate_type = "lib"]
+
+// Test that LLVM can eliminate the impossible `i == 0` check.
+
+// CHECK-LABEL: @issue_75546
+#[no_mangle]
+pub fn issue_75546() {
+ let mut i = 1u32;
+ while i < u32::MAX {
+ // CHECK-NOT: panic
+ if i == 0 { panic!(); }
+ i += 1;
+ }
+}