mirror of https://github.com/rust-lang/rust
36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
//@ compile-flags: -C no-prepopulate-passes
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//
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#![crate_type = "lib"]
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pub struct Bytes {
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a: u8,
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b: u8,
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c: u8,
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d: u8,
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}
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// CHECK-LABEL: small_array_alignment
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// The array is stored as i32, but its alignment is lower, go with 1 byte to avoid target
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// dependent alignment
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#[no_mangle]
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pub fn small_array_alignment(x: &mut [i8; 4], y: [i8; 4]) {
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// CHECK: [[TMP:%.+]] = alloca [4 x i8], align 4
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// CHECK: %y = alloca [4 x i8], align 1
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// CHECK: store i32 %0, ptr [[TMP]]
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// CHECK: call void @llvm.memcpy.{{.*}}(ptr align 1 {{.+}}, ptr align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
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*x = y;
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}
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// CHECK-LABEL: small_struct_alignment
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// The struct is stored as i32, but its alignment is lower, go with 1 byte to avoid target
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// dependent alignment
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#[no_mangle]
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pub fn small_struct_alignment(x: &mut Bytes, y: Bytes) {
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// CHECK: [[TMP:%.+]] = alloca [4 x i8], align 4
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// CHECK: %y = alloca [4 x i8], align 1
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// CHECK: store i32 %0, ptr [[TMP]]
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// CHECK: call void @llvm.memcpy.{{.*}}(ptr align 1 {{.+}}, ptr align 4 {{.+}}, i{{[0-9]+}} 4, i1 false)
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*x = y;
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}
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