Port issue-7349 to a codegen test

src/tools/tidy/src/allowed_run_make_makefiles.txt

@@ -131,7 +131,6 @@ run-make/issue-53964/Makefile
 run-make/issue-64153/Makefile
 run-make/issue-68794-textrel-on-minimal-lib/Makefile
 run-make/issue-69368/Makefile
-run-make/issue-7349/Makefile
 run-make/issue-83045/Makefile
 run-make/issue-83112-incr-test-moved-file/Makefile
 run-make/issue-84395-lto-embed-bitcode/Makefile

tests/codegen/no-redundant-item-monomorphization.rs

@@ -0,0 +1,33 @@
+// Test to make sure that inner functions within a polymorphic outer function
+// don't get re-codegened when the outer function is monomorphized. The test
+// code monomorphizes the outer functions several times, but the magic constants
+// used in the inner functions should each appear only once in the generated IR.
+
+// issue: rust-lang/rust#7349
+//@ compile-flags: -Cno-prepopulate-passes -Copt-level=0
+
+// CHECK-COUNT-1: ret i32 8675309
+// CHECK-COUNT-1: ret i32 11235813
+
+fn outer<T>() {
+    #[allow(dead_code)]
+    fn inner() -> u32 {
+        8675309
+    }
+    inner();
+}
+
+extern "C" fn outer_foreign<T>() {
+    #[allow(dead_code)]
+    fn inner() -> u32 {
+        11235813
+    }
+    inner();
+}
+
+fn main() {
+    outer::<isize>();
+    outer::<usize>();
+    outer_foreign::<isize>();
+    outer_foreign::<usize>();
+}

tests/run-make/issue-7349/Makefile

@@ -1,11 +0,0 @@
-include ../tools.mk
-
-# Test to make sure that inner functions within a polymorphic outer function
-# don't get re-codegened when the outer function is monomorphized.  The test
-# code monomorphizes the outer functions several times, but the magic constants
-# used in the inner functions should each appear only once in the generated IR.
-
-all:
-	$(RUSTC) foo.rs --emit=llvm-ir
-	[ "$$(grep -c 'ret i32 8675309' "$(TMPDIR)/foo.ll")" -eq "1" ]
-	[ "$$(grep -c 'ret i32 11235813' "$(TMPDIR)/foo.ll")" -eq "1" ]

tests/run-make/issue-7349/foo.rs

@@ -1,22 +0,0 @@
-fn outer<T>() {
-    #[allow(dead_code)]
-    fn inner() -> u32 {
-        8675309
-    }
-    inner();
-}
-
-extern "C" fn outer_foreign<T>() {
-    #[allow(dead_code)]
-    fn inner() -> u32 {
-        11235813
-    }
-    inner();
-}
-
-fn main() {
-    outer::<isize>();
-    outer::<usize>();
-    outer_foreign::<isize>();
-    outer_foreign::<usize>();
-}