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Fix codegen test for issue 37945

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This commit is contained in:
Tomasz Miąsko 2020-11-12 00:00:00 +00:00
parent 28463aac96
commit d54ea4f622
1 changed files with 14 additions and 6 deletions
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20
src/test/codegen/issue-37945.rs
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@ -1,26 +1,34 @@
// compile-flags: -O
// compile-flags: -O -Zmerge-functions=disabled
// ignore-x86
// ignore-arm
// ignore-emscripten
// ignore-gnux32
// ignore 32-bit platforms (LLVM has a bug with them)
// See issue #37945.
// Check that LLVM understands that `Iter` pointer is not null. Issue #37945.
#![crate_type = "lib"]
use std::slice::Iter;
// CHECK-LABEL: @is_empty_1
#[no_mangle]
pub fn is_empty_1(xs: Iter<f32>) -> bool {
// CHECK-NOT: icmp eq float* {{.*}}, null
// CHECK-LABEL: @is_empty_1(
// CHECK-NEXT: start:
// CHECK-NEXT: [[A:%.*]] = icmp ne i32* %xs.1, null
// CHECK-NEXT: tail call void @llvm.assume(i1 [[A]])
// CHECK-NEXT: [[B:%.*]] = icmp eq i32* %xs.0, %xs.1
// CHECK-NEXT: ret i1 [[B:%.*]]
{xs}.next().is_none()
}
// CHECK-LABEL: @is_empty_2
#[no_mangle]
pub fn is_empty_2(xs: Iter<f32>) -> bool {
// CHECK-NOT: icmp eq float* {{.*}}, null
// CHECK-LABEL: @is_empty_2
// CHECK-NEXT: start:
// CHECK-NEXT: [[C:%.*]] = icmp ne i32* %xs.1, null
// CHECK-NEXT: tail call void @llvm.assume(i1 [[C]])
// CHECK-NEXT: [[D:%.*]] = icmp eq i32* %xs.0, %xs.1
// CHECK-NEXT: ret i1 [[D:%.*]]
xs.map(|&x| x).next().is_none()
}