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ConstantTracker: Look through mark_dependence instructions #83904

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Merged
merged 1 commit into from
Aug 27, 2025
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ConstantTracker: Look through mark_dependence instructions #83904

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3 changes: 3 additions & 0 deletions lib/SILOptimizer/Utils/PerformanceInlinerUtils.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,9 @@ SILValue swift::stripFunctionConversions(SILValue val) {
val = cvt->getOperand();
result = val;
continue;
} else if (auto md = dyn_cast<MarkDependenceInst>(val)) {
val = md->getValue();
result = val;
} else {
break;
}
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15 changes: 10 additions & 5 deletions test/SILOptimizer/inline_heuristics.sil
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Expand Up @@ -30,22 +30,27 @@ enum E {
case B((Int32) -> Int32)
}

class C {
init()
}

// CHECK-LABEL: sil @testDirectClosure
// CHECK: [[C:%[0-9]+]] = thin_to_thick_function
// CHECK: apply [[C]](
// CHECK: [[MD:%[0-9]+]] = mark_dependence [[C]]
// CHECK: apply [[MD]](
// CHECK: return

// CHECK-LOG-LABEL: Inline into caller: testDirectClosure
// CHECK-LOG-NEXT: decision {{.*}}, b=70,

sil @testDirectClosure : $@convention(thin) () -> Int32 {
bb0:
sil @testDirectClosure : $@convention(thin) (@guaranteed C) -> Int32 {
bb0(%c : $C):
%0 = function_ref @takeDirectClosure : $@convention(thin) (@owned @callee_guaranteed (Int32) -> Int32) -> Int32
%1 = function_ref @closure : $@convention(thin) (Int32) -> Int32
%2 = thin_to_thick_function %1 : $@convention(thin) (Int32) -> Int32 to $@callee_guaranteed (Int32) -> Int32
%3 = apply %0(%2) : $@convention(thin) (@owned @callee_guaranteed (Int32) -> Int32) -> Int32
return %3 : $Int32
%3 = mark_dependence %2 on %c
%4 = apply %0(%3) : $@convention(thin) (@owned @callee_guaranteed (Int32) -> Int32) -> Int32
return %4 : $Int32
}

sil @takeDirectClosure : $@convention(thin) (@owned @callee_guaranteed (Int32) -> Int32) -> Int32 {
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