1be1c2ebcf
Inlining creates additional statements to be executed along the return edge: an assignment to the destination, storage end for temporaries. Previously those statements where inserted directly into a call target, but this is incorrect when the target has other predecessors. Avoid the issue by creating a new dedicated block for those statements. When the block happens to be redundant it will be removed by CFG simplification that follows inlining. Fixes #117355
43 lines
956 B
Rust
43 lines
956 B
Rust
// Test for inlining with an indirect destination place.
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//
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// unit-test: Inline
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// edition: 2021
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// needs-unwind
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#![crate_type = "lib"]
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#![feature(custom_mir, core_intrinsics)]
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use core::intrinsics::mir::*;
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#[custom_mir(dialect = "runtime", phase = "initial")]
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// CHECK-LABEL: fn f(
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// CHECK: bb1: {
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// CHECK-NEXT: StorageLive([[A:.*]]);
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// CHECK-NEXT: [[A]] = &mut (*_1);
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// CHECK-NEXT: StorageLive([[B:.*]]);
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// CHECK-NEXT: [[B]] = const 42_u8;
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// CHECK-NEXT: (*[[A]]) = move [[B]];
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// CHECK-NEXT: StorageDead([[B]]);
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// CHECK-NEXT: StorageDead([[A]]);
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// CHECK-NEXT: goto -> bb1;
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// CHECK-NEXT: }
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pub fn f(a: *mut u8) {
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mir! {
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{
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Goto(bb1)
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}
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bb1 = {
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Call(*a = g(), bb1, UnwindUnreachable())
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}
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}
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}
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#[custom_mir(dialect = "runtime", phase = "initial")]
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#[inline(always)]
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fn g() -> u8 {
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mir! {
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{
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RET = 42;
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Return()
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}
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}
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}
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