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-rw-r--r--tests/codegen-llvm/issues/issue-86109-eliminate-div-by-zero-check.rs26
1 files changed, 26 insertions, 0 deletions
diff --git a/tests/codegen-llvm/issues/issue-86109-eliminate-div-by-zero-check.rs b/tests/codegen-llvm/issues/issue-86109-eliminate-div-by-zero-check.rs
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index 00000000000..345c09738b6
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+++ b/tests/codegen-llvm/issues/issue-86109-eliminate-div-by-zero-check.rs
@@ -0,0 +1,26 @@
+//@ compile-flags: -Copt-level=3
+//! Test for https://github.com/rust-lang/rust/issues/86109
+//! Check LLVM can eliminate the impossible division by zero check by
+//! ensuring there is no call (to panic) instruction.
+//!
+//! This has been fixed since `rustc 1.70.0`.
+
+#![crate_type = "lib"]
+
+type T = i16;
+
+// CHECK-LABEL: @foo
+#[no_mangle]
+pub fn foo(start: T) -> T {
+    // CHECK-NOT: panic
+    if start <= 0 {
+        return 0;
+    }
+    let mut count = 0;
+    for i in start..10_000 {
+        if 752 % i != 0 {
+            count += 1;
+        }
+    }
+    count
+}