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104 lines
4.0 KiB
Rust
104 lines
4.0 KiB
Rust
// only-x86_64
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// compile-flags: -O -C no-prepopulate-passes --crate-type=lib
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// On LLVM 17 and earlier LLVM's own data layout specifies that i128 has 8 byte alignment,
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// while rustc wants it to have 16 byte alignment. This test checks that we handle this
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// correctly.
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// CHECK: %ScalarPair = type { i32, [3 x i32], i128 }
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// CHECK: %Struct = type { i32, i32, [2 x i32], i128 }
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#![feature(core_intrinsics)]
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#[repr(C)]
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#[derive(Clone, Copy)]
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pub struct ScalarPair {
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a: i32,
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b: i128,
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}
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#[no_mangle]
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pub fn load(x: &ScalarPair) -> ScalarPair {
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// CHECK-LABEL: @load(
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// CHECK-SAME: align 16 dereferenceable(32) %x
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// CHECK: [[A:%.*]] = load i32, ptr %x, align 16
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// CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr %x, i64 16
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// CHECK-NEXT: [[B:%.*]] = load i128, ptr [[GEP]], align 16
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// CHECK-NEXT: [[IV1:%.*]] = insertvalue { i32, i128 } poison, i32 [[A]], 0
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// CHECK-NEXT: [[IV2:%.*]] = insertvalue { i32, i128 } [[IV1]], i128 [[B]], 1
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// CHECK-NEXT: ret { i32, i128 } [[IV2]]
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*x
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}
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#[no_mangle]
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pub fn store(x: &mut ScalarPair) {
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// CHECK-LABEL: @store(
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// CHECK-SAME: align 16 dereferenceable(32) %x
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// CHECK: store i32 1, ptr %x, align 16
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// CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr %x, i64 16
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// CHECK-NEXT: store i128 2, ptr [[GEP]], align 16
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*x = ScalarPair { a: 1, b: 2 };
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}
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#[no_mangle]
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pub fn alloca() {
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// CHECK-LABEL: @alloca(
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// CHECK: [[X:%.*]] = alloca %ScalarPair, align 16
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// CHECK: store i32 1, ptr %x, align 16
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// CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr %x, i64 16
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// CHECK-NEXT: store i128 2, ptr [[GEP]], align 16
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let mut x = ScalarPair { a: 1, b: 2 };
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store(&mut x);
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}
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#[no_mangle]
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pub fn load_volatile(x: &ScalarPair) -> ScalarPair {
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// CHECK-LABEL: @load_volatile(
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// CHECK-SAME: align 16 dereferenceable(32) %x
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// CHECK: [[TMP:%.*]] = alloca %ScalarPair, align 16
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// CHECK: [[LOAD:%.*]] = load volatile %ScalarPair, ptr %x, align 16
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// CHECK-NEXT: store %ScalarPair [[LOAD]], ptr [[TMP]], align 16
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// CHECK-NEXT: [[A:%.*]] = load i32, ptr [[TMP]], align 16
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// CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[TMP]], i64 16
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// CHECK-NEXT: [[B:%.*]] = load i128, ptr [[GEP]], align 16
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unsafe { std::intrinsics::volatile_load(x) }
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}
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#[no_mangle]
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pub fn transmute(x: ScalarPair) -> (std::mem::MaybeUninit<i128>, i128) {
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// CHECK-LABEL: define { i128, i128 } @transmute(i32 noundef %x.0, i128 noundef %x.1)
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// CHECK: [[TMP:%.*]] = alloca { i128, i128 }, align 16
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// CHECK-NEXT: store i32 %x.0, ptr [[TMP]], align 16
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// CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[TMP]], i64 16
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// CHECK-NEXT: store i128 %x.1, ptr [[GEP]], align 16
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// CHECK-NEXT: [[LOAD1:%.*]] = load i128, ptr %_0, align 16
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// CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds i8, ptr [[TMP]], i64 16
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// CHECK-NEXT: [[LOAD2:%.*]] = load i128, ptr [[GEP2]], align 16
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// CHECK-NEXT: [[IV1:%.*]] = insertvalue { i128, i128 } poison, i128 [[LOAD1]], 0
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// CHECK-NEXT: [[IV2:%.*]] = insertvalue { i128, i128 } [[IV1]], i128 [[LOAD2]], 1
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// CHECK-NEXT: ret { i128, i128 } [[IV2]]
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unsafe { std::mem::transmute(x) }
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}
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#[repr(C)]
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#[derive(Clone, Copy)]
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pub struct Struct {
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a: i32,
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b: i32,
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c: i128,
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}
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#[no_mangle]
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pub fn store_struct(x: &mut Struct) {
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// CHECK-LABEL: @store_struct(
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// CHECK-SAME: align 16 dereferenceable(32) %x
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// CHECK: [[TMP:%.*]] = alloca %Struct, align 16
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// CHECK: store i32 1, ptr [[TMP]], align 16
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// CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds %Struct, ptr [[TMP]], i32 0, i32 1
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// CHECK-NEXT: store i32 2, ptr [[GEP1]], align 4
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// CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds %Struct, ptr [[TMP]], i32 0, i32 3
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// CHECK-NEXT: store i128 3, ptr [[GEP2]], align 16
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// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 16 %x, ptr align 16 [[TMP]], i64 32, i1 false)
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*x = Struct { a: 1, b: 2, c: 3 };
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}
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