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Auto merge of #128584 - DianQK:tests-for-llvm-19, r=nikic
Add a set of tests for LLVM 19 Close #107681. Close #118306. Close #126585. r? compiler
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20
tests/codegen/issues/issue-107681-unwrap_unchecked.rs
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tests/codegen/issues/issue-107681-unwrap_unchecked.rs
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//@ compile-flags: -O
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//@ min-llvm-version: 19
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// Test for #107681.
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// Make sure we don't create `br` or `select` instructions.
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#![crate_type = "lib"]
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use std::iter::Copied;
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use std::slice::Iter;
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#[no_mangle]
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pub unsafe fn foo(x: &mut Copied<Iter<'_, u32>>) -> u32 {
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// CHECK-LABEL: @foo(
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// CHECK-NOT: br
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// CHECK-NOT: select
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// CHECK: [[RET:%.*]] = load i32, ptr
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// CHECK-NEXT: ret i32 [[RET]]
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x.next().unwrap_unchecked()
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}
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tests/codegen/issues/issue-118306.rs
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tests/codegen/issues/issue-118306.rs
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//@ compile-flags: -O
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//@ min-llvm-version: 19
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//@ only-x86_64
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// Test for #118306.
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// Make sure we don't create `br` or `select` instructions.
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#![crate_type = "lib"]
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#[no_mangle]
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pub fn branchy(input: u64) -> u64 {
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// CHECK-LABEL: @branchy(
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// CHECK-NEXT: start:
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// CHECK-NEXT: [[_2:%.*]] = and i64 [[INPUT:%.*]], 3
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// CHECK-NEXT: [[SWITCH_GEP:%.*]] = getelementptr inbounds [4 x i64], ptr @switch.table.branchy, i64 0, i64 [[_2]]
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// CHECK-NEXT: [[SWITCH_LOAD:%.*]] = load i64, ptr [[SWITCH_GEP]]
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// CHECK-NEXT: ret i64 [[SWITCH_LOAD]]
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match input % 4 {
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1 | 2 => 1,
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3 => 2,
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_ => 0,
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}
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}
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tests/codegen/issues/issue-126585.rs
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tests/codegen/issues/issue-126585.rs
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//@ compile-flags: -Copt-level=s
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//@ min-llvm-version: 19
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//@ only-x86_64
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// Test for #126585.
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// Ensure that this IR doesn't have extra undef phi input, which also guarantees that this asm
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// doesn't have subsequent labels and unnecessary `jmp` instructions.
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#![crate_type = "lib"]
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#[no_mangle]
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fn checked_div_round(a: u64, b: u64) -> Option<u64> {
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// CHECK-LABEL: @checked_div_round
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// CHECK: phi
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// CHECK-NOT: undef
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// CHECK: phi
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// CHECK-NOT: undef
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match b {
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0 => None,
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1 => Some(a),
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// `a / b` is computable and `(a % b) * 2` can not overflow since `b >= 2`.
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b => Some(a / b + if (a % b) * 2 >= b { 1 } else { 0 }),
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}
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}
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