1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 // compile-flags: -C no-prepopulate-passes
14 #![feature(repr_transparent, repr_simd)]
16 use std::marker::PhantomData;
24 // CHECK: define float @test_F32(float %arg0)
26 pub extern fn test_F32(_: F32) -> F32 { loop {} }
29 pub struct Ptr(*mut u8);
31 // CHECK: define i8* @test_Ptr(i8* %arg0)
33 pub extern fn test_Ptr(_: Ptr) -> Ptr { loop {} }
36 pub struct WithZst(u64, Zst1);
38 // CHECK: define i64 @test_WithZst(i64 %arg0)
40 pub extern fn test_WithZst(_: WithZst) -> WithZst { loop {} }
43 pub struct WithZeroSizedArray(*const f32, [i8; 0]);
45 // Apparently we use i32* when newtype-unwrapping f32 pointers. Whatever.
46 // CHECK: define i32* @test_WithZeroSizedArray(i32* %arg0)
48 pub extern fn test_WithZeroSizedArray(_: WithZeroSizedArray) -> WithZeroSizedArray { loop {} }
51 pub struct Generic<T>(T);
53 // CHECK: define double @test_Generic(double %arg0)
55 pub extern fn test_Generic(_: Generic<f64>) -> Generic<f64> { loop {} }
58 pub struct GenericPlusZst<T>(T, Zst2);
61 pub enum Bool { True, False, FileNotFound }
63 // CHECK: define{{( zeroext)?}} i8 @test_Gpz(i8{{( zeroext)?}} %arg0)
65 pub extern fn test_Gpz(_: GenericPlusZst<Bool>) -> GenericPlusZst<Bool> { loop {} }
68 pub struct LifetimePhantom<'a, T: 'a>(*const T, PhantomData<&'a T>);
70 // CHECK: define i16* @test_LifetimePhantom(i16* %arg0)
72 pub extern fn test_LifetimePhantom(_: LifetimePhantom<i16>) -> LifetimePhantom<i16> { loop {} }
74 // This works despite current alignment resrictions because PhantomData is always align(1)
76 pub struct UnitPhantom<T, U> { val: T, unit: PhantomData<U> }
80 // CHECK: define float @test_UnitPhantom(float %arg0)
82 pub extern fn test_UnitPhantom(_: UnitPhantom<f32, Px>) -> UnitPhantom<f32, Px> { loop {} }
85 pub struct TwoZsts(Zst1, i8, Zst2);
87 // CHECK: define{{( signext)?}} i8 @test_TwoZsts(i8{{( signext)?}} %arg0)
89 pub extern fn test_TwoZsts(_: TwoZsts) -> TwoZsts { loop {} }
92 pub struct Nested1(Zst2, Generic<f64>);
94 // CHECK: define double @test_Nested1(double %arg0)
96 pub extern fn test_Nested1(_: Nested1) -> Nested1 { loop {} }
99 pub struct Nested2(Nested1, Zst1);
101 // CHECK: define double @test_Nested2(double %arg0)
103 pub extern fn test_Nested2(_: Nested2) -> Nested2 { loop {} }
106 struct f32x4(f32, f32, f32, f32);
109 pub struct Vector(f32x4);
111 // CHECK: define <4 x float> @test_Vector(<4 x float> %arg0)
113 pub extern fn test_Vector(_: Vector) -> Vector { loop {} }
115 trait Mirror { type It: ?Sized; }
116 impl<T: ?Sized> Mirror for T { type It = Self; }
119 pub struct StructWithProjection(<f32 as Mirror>::It);
121 // CHECK: define float @test_Projection(float %arg0)
123 pub extern fn test_Projection(_: StructWithProjection) -> StructWithProjection { loop {} }
126 // The rest of this file tests newtypes around small aggregates on an ABI where small aggregates are
127 // packed into one register. This is ABI-dependent, so instead we focus on one ABI and supply a
128 // dummy definition for other ABIs to keep FileCheck happy.
130 // Bigger aggregates are tested in separate files called repr-transparent-aggregate-*.rs because
131 // there, the expected LLVM IR function signatures vary so much that it's not reasonably possible to
132 // cover all of them with a single CHECK line. Instead we group ABIs by the general "shape" of the
133 // signature and have a separate test file for each bin.
135 // PS: You may be wondering why we don't just compare the return types and argument types for
136 // equality with FileCheck regex captures. Well, rustc doesn't perform newtype unwrapping on
137 // newtypes containing aggregates. This is OK on all ABIs we support, but because LLVM has not
138 // gotten rid of pointee types yet, the IR function signature will be syntactically different (%Foo*
142 pub struct Rgb8 { r: u8, g: u8, b: u8 }
145 pub struct Rgb8Wrap(Rgb8);
147 // NB: closing parenthesis is missing because sometimes the argument has a name and sometimes not
148 // CHECK: define i32 @test_Rgb8Wrap(i32
150 #[cfg(all(target_arch="x86_64", target_os="linux"))]
151 pub extern fn test_Rgb8Wrap(_: Rgb8Wrap) -> Rgb8Wrap { loop {} }
153 #[cfg(not(all(target_arch="x86_64", target_os="linux")))]
155 pub extern fn test_Rgb8Wrap(_: u32) -> u32 { loop {} }
157 // Same as with the small struct above: ABI-dependent, we only test the interesting case
158 // (ABIs that pack the aggregate into a scalar) and stub it out on other ABIs
161 pub union FloatBits {
167 pub struct SmallUnion(FloatBits);
169 // NB: closing parenthesis is missing because sometimes the argument has a name and sometimes not
170 // CHECK: define i32 @test_SmallUnion(i32
172 #[cfg(all(target_arch="x86_64", target_os="linux"))]
173 pub extern fn test_SmallUnion(_: SmallUnion) -> SmallUnion { loop {} }
175 #[cfg(not(all(target_arch="x86_64", target_os="linux")))]
177 pub extern fn test_SmallUnion(_: u32) -> u32 { loop {} }