Revert "tests: allow trunc/select instructions to be missing"

This reverts commit 9692513.

Author: dianqk

tests/codegen/try_question_mark_nop.rs

@@ -1,25 +1,22 @@
 //@ compile-flags: -O -Z merge-functions=disabled --edition=2021
 //@ only-x86_64
 // FIXME: Remove the `min-llvm-version`.
-//@ revisions: NINETEEN TWENTY
-//@[NINETEEN] min-llvm-version: 19
-//@[NINETEEN] ignore-llvm-version: 20-99
-//@[TWENTY] min-llvm-version: 20
+//@ min-llvm-version: 19
 
 #![crate_type = "lib"]
 #![feature(try_blocks)]
 
 use std::ops::ControlFlow::{self, Break, Continue};
 use std::ptr::NonNull;
 
+// FIXME: The `trunc` and `select` instructions can be eliminated.
 // CHECK-LABEL: @option_nop_match_32
 #[no_mangle]
 pub fn option_nop_match_32(x: Option<u32>) -> Option<u32> {
     // CHECK: start:
-    // NINETEEN-NEXT: [[TRUNC:%.*]] = trunc nuw i32 %0 to i1
-    // NINETEEN-NEXT: [[FIRST:%.*]] = select i1 [[TRUNC]], i32 %0
-    // NINETEEN-NEXT: insertvalue { i32, i32 } poison, i32 [[FIRST]], 0
-    // TWENTY-NEXT: insertvalue { i32, i32 } poison, i32 %0, 0
+    // CHECK-NEXT: [[TRUNC:%.*]] = trunc nuw i32 %0 to i1
+    // CHECK-NEXT: [[FIRST:%.*]] = select i1 [[TRUNC]], i32 %0
+    // CHECK-NEXT: insertvalue { i32, i32 } poison, i32 [[FIRST]]
     // CHECK-NEXT: insertvalue { i32, i32 }
     // CHECK-NEXT: ret { i32, i32 }
     match x {