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Auto merge of #130454 - durin42:llvm-20-notrunc, r=workingjubilee

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tests: allow trunc/select instructions to be missing

On LLVM 20, these instructions already get eliminated, which at least partially satisfies a TODO. I'm not talented enough at using FileCheck to try and constrain this further, but if we really want to we could copy an LLVM 20 specific version of this test that would restore it to being CHECK-NEXT: insertvalue ...

`@rustbot` label: +llvm-main
r? `@DianQK`
This commit is contained in:
bors 2024-09-18 01:27:26 +00:00
commit 60c3673456
1 changed files with 8 additions and 5 deletions
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13
tests/codegen/try_question_mark_nop.rs
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@ -1,7 +1,10 @@
//@ compile-flags: -O -Z merge-functions=disabled --edition=2021
//@ only-x86_64
// FIXME: Remove the `min-llvm-version`.
//@ min-llvm-version: 19
//@ revisions: NINETEEN TWENTY
//@[NINETEEN] min-llvm-version: 19
//@[NINETEEN] ignore-llvm-version: 20-99
//@[TWENTY] min-llvm-version: 20
#![crate_type = "lib"]
#![feature(try_blocks)]
@ -9,14 +12,14 @@
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:
// 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]]
// 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: insertvalue { i32, i32 }
// CHECK-NEXT: ret { i32, i32 }
match x {