rust/tests/mir-opt/instsimplify/intrinsic_asserts.rs

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//@ test-mir-pass: InstSimplify-after-simplifycfg
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#![crate_type = "lib"]
#![feature(core_intrinsics)]
// All these assertions pass, so all the intrinsic calls should be deleted.
// EMIT_MIR intrinsic_asserts.removable.InstSimplify-after-simplifycfg.diff
pub fn removable() {
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// CHECK-LABEL: fn removable(
// CHECK-NOT: assert_inhabited
// CHECK-NOT: assert_zero_valid
// CHECK-NOT: assert_mem_uninitialized_valid
core::intrinsics::assert_inhabited::<()>();
core::intrinsics::assert_zero_valid::<u8>();
core::intrinsics::assert_mem_uninitialized_valid::<u8>();
}
enum Never {}
// These assertions all diverge, so their target blocks should become None.
// EMIT_MIR intrinsic_asserts.panics.InstSimplify-after-simplifycfg.diff
pub fn panics() {
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// CHECK-LABEL: fn panics(
// CHECK: assert_inhabited::<Never>() -> unwind
// CHECK: assert_zero_valid::<&u8>() -> unwind
// CHECK: assert_mem_uninitialized_valid::<&u8>() -> unwind
core::intrinsics::assert_inhabited::<Never>();
core::intrinsics::assert_zero_valid::<&u8>();
core::intrinsics::assert_mem_uninitialized_valid::<&u8>();
}
// Whether or not these asserts pass isn't known, so they shouldn't be modified.
// EMIT_MIR intrinsic_asserts.generic.InstSimplify-after-simplifycfg.diff
pub fn generic<T>() {
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// CHECK-LABEL: fn generic(
// CHECK: assert_inhabited::<T>() -> [return:
// CHECK: assert_zero_valid::<T>() -> [return:
// CHECK: assert_mem_uninitialized_valid::<T>() -> [return:
core::intrinsics::assert_inhabited::<T>();
core::intrinsics::assert_zero_valid::<T>();
core::intrinsics::assert_mem_uninitialized_valid::<T>();
}
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// Whether or not these asserts pass isn't known, so they shouldn't be modified.
// EMIT_MIR intrinsic_asserts.generic_ref.InstSimplify-after-simplifycfg.diff
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pub fn generic_ref<T>() {
// CHECK-LABEL: fn generic_ref(
// CHECK: assert_mem_uninitialized_valid::<&T>() -> [return:
core::intrinsics::assert_mem_uninitialized_valid::<&T>();
}