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rustc_trans: approximate ABI alignment for padding/union fillers.

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This commit is contained in:
Eduard-Mihai Burtescu 2017-12-10 17:35:23 +02:00
parent 84feab34e4
commit 8a26e0422d
4 changed files with 58 additions and 13 deletions
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20
src/test/codegen/align-struct.rs
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@ -9,6 +9,8 @@
// except according to those terms.
// compile-flags: -C no-prepopulate-passes
// ignore-tidy-linelength
#![crate_type = "lib"]
#![feature(attr_literals)]
@ -16,6 +18,7 @@
#[repr(align(64))]
pub struct Align64(i32);
// CHECK: %Align64 = type { [0 x i32], i32, [15 x i32] }
pub struct Nested64 {
a: Align64,
@ -23,11 +26,20 @@ pub struct Nested64 {
c: i32,
d: i8,
}
// CHECK: %Nested64 = type { [0 x i64], %Align64, [0 x i32], i32, [0 x i32], i32, [0 x i8], i8, [55 x i8] }
pub enum Enum4 {
A(i32),
B(i32),
}
// CHECK: %Enum4 = type { [2 x i32] }
pub enum Enum64 {
A(Align64),
B(i32),
}
// CHECK: %Enum64 = type { [16 x i64] }
// CHECK: %"Enum64::A" = type { [8 x i64], %Align64, [0 x i64] }
// CHECK-LABEL: @align64
#[no_mangle]
@ -46,6 +58,14 @@ pub fn nested64(a: Align64, b: i32, c: i32, d: i8) -> Nested64 {
n64
}
// CHECK-LABEL: @enum4
#[no_mangle]
pub fn enum4(a: i32) -> Enum4 {
// CHECK: %e4 = alloca %Enum4, align 4
let e4 = Enum4::A(a);
e4
}
// CHECK-LABEL: @enum64
#[no_mangle]
pub fn enum64(a: Align64) -> Enum64 {