rust/tests/codegen/stores.rs

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