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rustc_mir: properly map scope parent chains into the caller when inlining.

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This commit is contained in:
Eduard-Mihai Burtescu 2020-09-21 07:13:34 +03:00
parent 6451b39a25
commit 387e31c9a7
8 changed files with 72 additions and 19 deletions
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5
compiler/rustc_mir/src/transform/inline.rs
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@ -435,6 +435,11 @@ impl Inliner<'tcx> {
let mut scope_map = IndexVec::with_capacity(callee_body.source_scopes.len());
for mut scope in callee_body.source_scopes.iter().cloned() {
// Map the callee scopes into the caller.
// FIXME(eddyb) this may ICE if the scopes are out of order.
scope.parent_scope = scope.parent_scope.map(|s| scope_map[s]);
scope.inlined_parent_scope = scope.inlined_parent_scope.map(|s| scope_map[s]);
if scope.parent_scope.is_none() {
let callsite_scope = &caller_body.source_scopes[callsite.source_info.scope];

6
src/test/mir-opt/inline/inline_closure_borrows_arg.foo.Inline.after.mir
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@ -17,11 +17,11 @@ fn foo(_1: T, _2: &i32) -> i32 {
debug r => _9; // in scope 2 at $DIR/inline-closure-borrows-arg.rs:12:14: 12:15
debug _s => _10; // in scope 2 at $DIR/inline-closure-borrows-arg.rs:12:23: 12:25
let _8: &i32; // in scope 2 at $DIR/inline-closure-borrows-arg.rs:16:5: 16:12
scope 3 {
debug variable => _8; // in scope 3 at $DIR/inline-closure-borrows-arg.rs:13:13: 13:21
}
}
}
scope 3 {
debug variable => _8; // in scope 3 at $DIR/inline-closure-borrows-arg.rs:13:13: 13:21
}
bb0: {
StorageLive(_3); // scope 0 at $DIR/inline-closure-borrows-arg.rs:12:9: 12:10

7
src/test/mir-opt/inline/issue-76997-inline-scopes-parenting.rs Normal file
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@ -0,0 +1,7 @@
// Tests that MIR inliner can handle `SourceScopeData` parenting correctly. (#76997)
// EMIT_MIR issue_76997_inline_scopes_parenting.main.Inline.after.mir
fn main() {
let f = |x| { let y = x; y };
f(())
}

41
src/test/mir-opt/inline/issue_76997_inline_scopes_parenting.main.Inline.after.mir Normal file
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@ -0,0 +1,41 @@
// MIR for `main` after Inline
fn main() -> () {
let mut _0: (); // return place in scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:4:11: 4:11
let _1: [closure@$DIR/issue-76997-inline-scopes-parenting.rs:5:13: 5:33]; // in scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:5:9: 5:10
let mut _2: &[closure@$DIR/issue-76997-inline-scopes-parenting.rs:5:13: 5:33]; // in scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:6
let mut _3: ((),); // in scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
let mut _4: (); // in scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:6:7: 6:9
let mut _6: (); // in scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
scope 1 {
debug f => _1; // in scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:5:9: 5:10
scope 2 (inlined main::{closure#0}) { // at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
debug x => _6; // in scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:5:14: 5:15
let _5: (); // in scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
scope 3 {
debug y => _5; // in scope 3 at $DIR/issue-76997-inline-scopes-parenting.rs:5:23: 5:24
}
}
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:5:9: 5:10
StorageLive(_2); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:6
_2 = &_1; // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:6
StorageLive(_3); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageLive(_4); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:7: 6:9
(_3.0: ()) = move _4; // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageLive(_6); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
_6 = move (_3.0: ()); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageLive(_5); // scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:5:23: 5:24
_5 = const (); // scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:5:27: 5:28
_0 = const (); // scope 3 at $DIR/issue-76997-inline-scopes-parenting.rs:5:30: 5:31
StorageDead(_5); // scope 2 at $DIR/issue-76997-inline-scopes-parenting.rs:5:32: 5:33
StorageDead(_6); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:5: 6:10
StorageDead(_4); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:9: 6:10
StorageDead(_3); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:9: 6:10
StorageDead(_2); // scope 1 at $DIR/issue-76997-inline-scopes-parenting.rs:6:9: 6:10
StorageDead(_1); // scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:7:1: 7:2
return; // scope 0 at $DIR/issue-76997-inline-scopes-parenting.rs:7:2: 7:2
}
}

8
src/test/mir-opt/issue_73223.main.PreCodegen.32bit.diff
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@ -41,6 +41,8 @@
let mut _23: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _24: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _25: &&i32; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 7 {
}
}
scope 8 (inlined ArgumentV1::new::<&i32>) { // at $SRC_DIR/std/src/macros.rs:LL:COL
debug x => _28; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL
@ -48,6 +50,8 @@
let mut _26: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _27: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _28: &&i32; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 9 {
}
}
}
scope 10 (inlined Arguments::new_v1) { // at $SRC_DIR/std/src/macros.rs:LL:COL
@ -63,10 +67,6 @@
scope 2 {
debug v => _3; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15
}
scope 7 {
}
scope 9 {
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/issue-73223.rs:2:9: 2:14

8
src/test/mir-opt/issue_73223.main.PreCodegen.64bit.diff
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@ -41,6 +41,8 @@
let mut _23: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _24: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _25: &&i32; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 7 {
}
}
scope 8 (inlined ArgumentV1::new::<&i32>) { // at $SRC_DIR/std/src/macros.rs:LL:COL
debug x => _28; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL
@ -48,6 +50,8 @@
let mut _26: for<'r, 's, 't0> fn(&'r core::fmt::Opaque, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _27: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _28: &&i32; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 9 {
}
}
}
scope 10 (inlined Arguments::new_v1) { // at $SRC_DIR/std/src/macros.rs:LL:COL
@ -63,10 +67,6 @@
scope 2 {
debug v => _3; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15
}
scope 7 {
}
scope 9 {
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/issue-73223.rs:2:9: 2:14

8
src/test/mir-opt/issue_73223.main.SimplifyArmIdentity.32bit.diff
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@ -65,6 +65,8 @@
let mut _47: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _48: &core::fmt::Opaque; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _49: &&i32; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 7 {
}
}
scope 8 (inlined ArgumentV1::new::<&i32>) { // at $SRC_DIR/std/src/macros.rs:LL:COL
debug x => _42; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL
@ -73,6 +75,8 @@
let mut _51: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _52: &core::fmt::Opaque; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _53: &&i32; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 9 {
}
}
}
scope 10 (inlined Arguments::new_v1) { // at $SRC_DIR/std/src/macros.rs:LL:COL
@ -88,10 +92,6 @@
scope 2 {
debug v => _4; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15
}
scope 7 {
}
scope 9 {
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/issue-73223.rs:2:9: 2:14

8
src/test/mir-opt/issue_73223.main.SimplifyArmIdentity.64bit.diff
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@ -65,6 +65,8 @@
let mut _47: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _48: &core::fmt::Opaque; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _49: &&i32; // in scope 6 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 7 {
}
}
scope 8 (inlined ArgumentV1::new::<&i32>) { // at $SRC_DIR/std/src/macros.rs:LL:COL
debug x => _42; // in scope 8 at $SRC_DIR/core/src/fmt/mod.rs:LL:COL
@ -73,6 +75,8 @@
let mut _51: for<'r, 's, 't0> fn(&'r &i32, &'s mut std::fmt::Formatter<'t0>) -> std::result::Result<(), std::fmt::Error>; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _52: &core::fmt::Opaque; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
let mut _53: &&i32; // in scope 8 at $SRC_DIR/std/src/macros.rs:LL:COL
scope 9 {
}
}
}
scope 10 (inlined Arguments::new_v1) { // at $SRC_DIR/std/src/macros.rs:LL:COL
@ -88,10 +92,6 @@
scope 2 {
debug v => _4; // in scope 2 at $DIR/issue-73223.rs:3:14: 3:15
}
scope 7 {
}
scope 9 {
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/issue-73223.rs:2:9: 2:14