Move SMIR projections tests to new file
This commit is contained in:
Kirby Linvill
parent
b1585983cc
commit
98228e67bc
@ -23,7 +23,6 @@
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use rustc_middle::ty::TyCtxt;
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use rustc_smir::rustc_internal;
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use stable_mir::mir::mono::Instance;
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use stable_mir::mir::{ProjectionElem, Rvalue, StatementKind};
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use stable_mir::ty::{RigidTy, TyKind};
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use std::assert_matches::assert_matches;
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use std::io::Write;
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@ -164,99 +163,6 @@ fn test_stable_mir(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
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stable_mir::ty::TyKind::RigidTy(stable_mir::ty::RigidTy::Bool)
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);
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let projections_fn = get_item(&items, (DefKind::Fn, "projections")).unwrap();
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let body = projections_fn.body();
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assert_eq!(body.blocks.len(), 4);
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// The first statement assigns `&s.c` to a local. The projections include a deref for `s`, since
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// `s` is passed as a reference argument, and a field access for field `c`.
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match &body.blocks[0].statements[0].kind {
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StatementKind::Assign(
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stable_mir::mir::Place { local: _, projection: local_proj },
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Rvalue::Ref(_, _, stable_mir::mir::Place { local: _, projection: r_proj }),
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) => {
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// We can't match on vecs, only on slices. Comparing for equality wouldn't be any easier
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// since we'd then have to add in the expected local and region values instead of
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// matching on wildcards.
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assert_matches!(local_proj[..], []);
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match &r_proj[..] {
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// Similarly we can't match against a type, only against its kind.
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[ProjectionElem::Deref, ProjectionElem::Field(2, ty)] => assert_matches!(
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ty.kind(),
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TyKind::RigidTy(RigidTy::Uint(stable_mir::ty::UintTy::U8))
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),
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other => panic!(
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"Unable to match against expected rvalue projection. Expected the projection \
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for `s.c`, which is a Deref and u8 Field. Got: {:?}",
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other
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),
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};
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}
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other => panic!(
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"Unable to match against expected Assign statement with a Ref rvalue. Expected the \
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statement to assign `&s.c` to a local. Got: {:?}",
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other
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),
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};
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// This statement assigns `slice[1]` to a local. The projections include a deref for `slice`,
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// since `slice` is a reference, and an index.
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match &body.blocks[2].statements[0].kind {
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StatementKind::Assign(
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stable_mir::mir::Place { local: _, projection: local_proj },
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Rvalue::Use(stable_mir::mir::Operand::Copy(stable_mir::mir::Place {
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local: _,
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projection: r_proj,
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})),
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) => {
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// We can't match on vecs, only on slices. Comparing for equality wouldn't be any easier
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// since we'd then have to add in the expected local values instead of matching on
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// wildcards.
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assert_matches!(local_proj[..], []);
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assert_matches!(r_proj[..], [ProjectionElem::Deref, ProjectionElem::Index(_)]);
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}
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other => panic!(
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"Unable to match against expected Assign statement with a Use rvalue. Expected the \
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statement to assign `slice[1]` to a local. Got: {:?}",
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other
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),
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};
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// The first terminator gets a slice of an array via the Index operation. Specifically it
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// performs `&vals[1..3]`. There are no projections in this case, the arguments are just locals.
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match &body.blocks[0].terminator.kind {
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stable_mir::mir::TerminatorKind::Call { args, .. } =>
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// We can't match on vecs, only on slices. Comparing for equality wouldn't be any easier
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// since we'd then have to add in the expected local values instead of matching on
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// wildcards.
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{
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match &args[..] {
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[
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stable_mir::mir::Operand::Move(stable_mir::mir::Place {
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local: _,
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projection: arg1_proj,
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}),
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stable_mir::mir::Operand::Move(stable_mir::mir::Place {
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local: _,
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projection: arg2_proj,
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}),
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] => {
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assert_matches!(arg1_proj[..], []);
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assert_matches!(arg2_proj[..], []);
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}
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other => {
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panic!(
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"Unable to match against expected arguments to Index call. Expected two \
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move operands. Got: {:?}",
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other
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)
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}
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}
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}
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other => panic!(
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"Unable to match against expected Call terminator. Expected a terminator that calls \
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the Index operation. Got: {:?}",
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other
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),
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};
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ControlFlow::Continue(())
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}
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@ -336,15 +242,6 @@ pub fn locals(a: i32, _: u64) -> char {{
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}} else {{
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'b'
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}}
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}}
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pub struct Struct1 {{ _a: u8, _b: u16, c: u8 }}
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pub fn projections(s: &Struct1) -> u8 {{
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let v = &s.c;
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let vals = [1, 2, 3, 4];
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let slice = &vals[1..3];
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v + slice[1]
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}}"#
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)?;
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Ok(())
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175
tests/ui-fulldeps/stable-mir/projections.rs
Normal file
175
tests/ui-fulldeps/stable-mir/projections.rs
Normal file
@ -0,0 +1,175 @@
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// run-pass
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// Tests the Stable MIR projections API
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// ignore-stage1
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// ignore-cross-compile
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// ignore-remote
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// ignore-windows-gnu mingw has troubles with linking https://github.com/rust-lang/rust/pull/116837
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// edition: 2021
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#![feature(rustc_private)]
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#![feature(assert_matches)]
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#![feature(control_flow_enum)]
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extern crate rustc_hir;
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extern crate rustc_middle;
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#[macro_use]
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extern crate rustc_smir;
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extern crate rustc_driver;
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extern crate rustc_interface;
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extern crate stable_mir;
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use rustc_hir::def::DefKind;
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use rustc_middle::ty::TyCtxt;
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use rustc_smir::rustc_internal;
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use stable_mir::mir::{ProjectionElem, Rvalue, StatementKind};
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use stable_mir::ty::{RigidTy, TyKind};
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use std::assert_matches::assert_matches;
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use std::io::Write;
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use std::ops::ControlFlow;
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const CRATE_NAME: &str = "input";
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/// This function uses the Stable MIR APIs to get information about the test crate.
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fn test_projections(_tcx: TyCtxt<'_>) -> ControlFlow<()> {
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// Find items in the local crate.
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let items = stable_mir::all_local_items();
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let body = get_item(&items, (DefKind::Fn, "projections")).unwrap().body();
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assert_eq!(body.blocks.len(), 4);
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// The first statement assigns `&s.c` to a local. The projections include a deref for `s`, since
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// `s` is passed as a reference argument, and a field access for field `c`.
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match &body.blocks[0].statements[0].kind {
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StatementKind::Assign(
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stable_mir::mir::Place { local: _, projection: local_proj },
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Rvalue::Ref(_, _, stable_mir::mir::Place { local: _, projection: r_proj }),
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) => {
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// We can't match on vecs, only on slices. Comparing statements for equality wouldn't be
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// any easier since we'd then have to add in the expected local and region values
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// instead of matching on wildcards.
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assert_matches!(local_proj[..], []);
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match &r_proj[..] {
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// Similarly we can't match against a type, only against its kind.
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[ProjectionElem::Deref, ProjectionElem::Field(2, ty)] => assert_matches!(
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ty.kind(),
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TyKind::RigidTy(RigidTy::Uint(stable_mir::ty::UintTy::U8))
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),
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other => panic!(
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"Unable to match against expected rvalue projection. Expected the projection \
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for `s.c`, which is a Deref and u8 Field. Got: {:?}",
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other
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),
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};
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}
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other => panic!(
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"Unable to match against expected Assign statement with a Ref rvalue. Expected the \
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statement to assign `&s.c` to a local. Got: {:?}",
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other
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),
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};
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// This statement assigns `slice[1]` to a local. The projections include a deref for `slice`,
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// since `slice` is a reference, and an index.
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match &body.blocks[2].statements[0].kind {
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StatementKind::Assign(
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stable_mir::mir::Place { local: _, projection: local_proj },
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Rvalue::Use(stable_mir::mir::Operand::Copy(stable_mir::mir::Place {
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local: _,
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projection: r_proj,
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})),
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) => {
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// We can't match on vecs, only on slices. Comparing for equality wouldn't be any easier
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// since we'd then have to add in the expected local values instead of matching on
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// wildcards.
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assert_matches!(local_proj[..], []);
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assert_matches!(r_proj[..], [ProjectionElem::Deref, ProjectionElem::Index(_)]);
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}
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other => panic!(
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"Unable to match against expected Assign statement with a Use rvalue. Expected the \
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statement to assign `slice[1]` to a local. Got: {:?}",
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other
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),
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};
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// The first terminator gets a slice of an array via the Index operation. Specifically it
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// performs `&vals[1..3]`. There are no projections in this case, the arguments are just locals.
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match &body.blocks[0].terminator.kind {
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stable_mir::mir::TerminatorKind::Call { args, .. } =>
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// We can't match on vecs, only on slices. Comparing for equality wouldn't be any easier
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// since we'd then have to add in the expected local values instead of matching on
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// wildcards.
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{
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match &args[..] {
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[
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stable_mir::mir::Operand::Move(stable_mir::mir::Place {
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local: _,
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projection: arg1_proj,
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}),
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stable_mir::mir::Operand::Move(stable_mir::mir::Place {
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local: _,
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projection: arg2_proj,
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}),
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] => {
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assert_matches!(arg1_proj[..], []);
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assert_matches!(arg2_proj[..], []);
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}
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other => {
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panic!(
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"Unable to match against expected arguments to Index call. Expected two \
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move operands. Got: {:?}",
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other
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)
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}
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}
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}
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other => panic!(
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"Unable to match against expected Call terminator. Expected a terminator that calls \
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the Index operation. Got: {:?}",
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other
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),
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};
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ControlFlow::Continue(())
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}
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// Use internal API to find a function in a crate.
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fn get_item<'a>(
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items: &'a stable_mir::CrateItems,
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item: (DefKind, &str),
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) -> Option<&'a stable_mir::CrateItem> {
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items.iter().find(|crate_item| {
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crate_item.kind().to_string() == format!("{:?}", item.0) && crate_item.name() == item.1
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})
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}
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/// This test will generate and analyze a dummy crate using the stable mir.
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/// For that, it will first write the dummy crate into a file.
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/// Then it will create a `StableMir` using custom arguments and then
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/// it will run the compiler.
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fn main() {
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let path = "input.rs";
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generate_input(&path).unwrap();
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let args = vec![
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"rustc".to_string(),
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"--crate-type=lib".to_string(),
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"--crate-name".to_string(),
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CRATE_NAME.to_string(),
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path.to_string(),
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];
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run!(args, tcx, test_projections(tcx)).unwrap();
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}
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fn generate_input(path: &str) -> std::io::Result<()> {
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let mut file = std::fs::File::create(path)?;
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write!(
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file,
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r#"
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pub struct Struct1 {{ _a: u8, _b: u16, c: u8 }}
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pub fn projections(s: &Struct1) -> u8 {{
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let v = &s.c;
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let vals = [1, 2, 3, 4];
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let slice = &vals[1..3];
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v + slice[1]
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}}"#
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)?;
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Ok(())
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}
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