fix codegen test

Author: the8472

tests/codegen/issues/issue-103840.rs

@@ -1,4 +1,5 @@
 // compile-flags: -O
+// min-llvm-version: 16.0
 #![crate_type = "lib"]
 
 pub fn foo(t: &mut Vec<usize>) {

tests/codegen/issues/issue-105386-ub-in-debuginfo.rs

@@ -19,4 +19,5 @@ pub fn outer_function(x: S, y: S) -> usize {
 // CHECK-NOT: [[ptr_tmp:%.*]] = getelementptr inbounds %"[closure@{{.*.rs}}:9:23: 9:25]", ptr [[spill]]
 // CHECK-NOT: [[load:%.*]] = load ptr, ptr
 // CHECK: call void @llvm.lifetime.start{{.*}}({{.*}}, ptr [[spill]])
-// CHECK: call void @llvm.memcpy{{.*}}(ptr {{align .*}} [[spill]], ptr {{align .*}} %x
+// CHECK: [[inner:%.*]] = getelementptr inbounds %"{{.*}}", ptr [[spill]]
+// CHECK: call void @llvm.memcpy{{.*}}(ptr {{align .*}} [[inner]], ptr {{align .*}} %x

tests/codegen/issues/issue-86106.rs

@@ -1,4 +1,5 @@
 // min-llvm-version: 15.0
+// only-64bit llvm appears to use stores instead of memset on 32bit
 // compile-flags: -C opt-level=3 -Z merge-functions=disabled
 
 // The below two functions ensure that both `String::new()` and `"".to_string()`
@@ -19,9 +20,9 @@ pub fn string_new() -> String {
 // CHECK-LABEL: define void @empty_to_string
 #[no_mangle]
 pub fn empty_to_string() -> String {
-    // CHECK: getelementptr
+    // CHECK: store ptr inttoptr
+    // CHECK-NEXT: getelementptr
     // CHECK-NEXT: call void @llvm.memset
-    // CHECK-NEXT: store ptr inttoptr
     // CHECK-NEXT: ret void
     "".to_string()
 }