From d032a4b079e9605bd95919db59c817422e0fdba8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Francis=20Gagn=C3=A9?= <fragag1@gmail.com>
Date: Sat, 10 Mar 2018 19:04:40 -0500
Subject: [PATCH] Strengthen the repeat-trusted-len test

Simply checking for the presence of `llvm.memset` is too brittle because
this instrinsic can be used for seemingly trivial operations, such as
zero-initializing a `RawVec`.
---
 src/test/codegen/repeat-trusted-len.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/test/codegen/repeat-trusted-len.rs b/src/test/codegen/repeat-trusted-len.rs
index 43872f15d51e..8b3294281e96 100644
--- a/src/test/codegen/repeat-trusted-len.rs
+++ b/src/test/codegen/repeat-trusted-len.rs
@@ -15,9 +15,14 @@
 
 use std::iter;
 
+// CHECK: @helper([[USIZE:i[0-9]+]] %arg0)
+#[no_mangle]
+pub fn helper(_: usize) {
+}
+
 // CHECK-LABEL: @repeat_take_collect
 #[no_mangle]
 pub fn repeat_take_collect() -> Vec<u8> {
-// CHECK: call void @llvm.memset.p0i8
+// CHECK: call void @llvm.memset.p0i8.[[USIZE]](i8* {{(nonnull )?}}%{{[0-9]+}}, i8 42, [[USIZE]] 100000, i32 1, i1 false)
     iter::repeat(42).take(100000).collect()
 }