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Replace GetCurrentReturnSlot with GetReturnedVarParam (#6571)

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Not all functions have a return slot, and once we have composite forms,
functions will be able to have any number of return slots. Obtaining a
unique return slot for a function only makes sense in `returned var`
handling.
This commit is contained in:
Geoff Romer
2026-01-10 01:56:32 +00:00
committed by GitHub
parent 3c70a9f59b
commit 6985ecb1d4
219 changed files with 1097 additions and 1089 deletions
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toolchain/check/testdata/interop/cpp/impls/copy.carbon
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+9 -9
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@@ -256,10 +256,10 @@ fn EqualWitnesses(p: Wrap(Cpp.Copyable)*) -> Wrap(Cpp.Copyable)* {
// CHECK:STDOUT: %addr.loc8_10.1: %ptr.e47 = addr_of %.loc8_10.2
// CHECK:STDOUT: %.loc8_10.3: %ptr.29d = as_compatible %addr.loc8_10.1
// CHECK:STDOUT: %.loc8_10.4: %ptr.29d = converted %addr.loc8_10.1, %.loc8_10.3
// CHECK:STDOUT: %addr.loc8_10.2: %ptr.e47 = addr_of %.loc6_34
// CHECK:STDOUT: %addr.loc8_10.2: %ptr.e47 = addr_of %.loc6_40.1
// CHECK:STDOUT: %Copyable__carbon_thunk.call: init %empty_tuple.type = call imports.%Copyable__carbon_thunk.decl(%.loc8_10.4, %addr.loc8_10.2)
// CHECK:STDOUT: %.loc8_10.5: init %Copyable = in_place_init %Copyable__carbon_thunk.call, %.loc6_34
// CHECK:STDOUT: return %.loc8_10.5 to %return
// CHECK:STDOUT: %.loc8_10.5: init %Copyable = in_place_init %Copyable__carbon_thunk.call, %.loc6_40.1
// CHECK:STDOUT: return %.loc8_10.5 to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @CopyExplicitCopy(%c.param: %ExplicitCopy) -> %return.param: %ExplicitCopy {
@@ -275,10 +275,10 @@ fn EqualWitnesses(p: Wrap(Cpp.Copyable)*) -> Wrap(Cpp.Copyable)* {
// CHECK:STDOUT: %addr.loc14_10.1: %ptr.84c = addr_of %.loc14_10.2
// CHECK:STDOUT: %.loc14_10.3: %ptr.093 = as_compatible %addr.loc14_10.1
// CHECK:STDOUT: %.loc14_10.4: %ptr.093 = converted %addr.loc14_10.1, %.loc14_10.3
// CHECK:STDOUT: %addr.loc14_10.2: %ptr.84c = addr_of %.loc12_42
// CHECK:STDOUT: %addr.loc14_10.2: %ptr.84c = addr_of %.loc12_48.1
// CHECK:STDOUT: %ExplicitCopy__carbon_thunk.call: init %empty_tuple.type = call imports.%ExplicitCopy__carbon_thunk.decl(%.loc14_10.4, %addr.loc14_10.2)
// CHECK:STDOUT: %.loc14_10.5: init %ExplicitCopy = in_place_init %ExplicitCopy__carbon_thunk.call, %.loc12_42
// CHECK:STDOUT: return %.loc14_10.5 to %return
// CHECK:STDOUT: %.loc14_10.5: init %ExplicitCopy = in_place_init %ExplicitCopy__carbon_thunk.call, %.loc12_48.1
// CHECK:STDOUT: return %.loc14_10.5 to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- copy_generically.carbon
@@ -323,8 +323,8 @@ fn EqualWitnesses(p: Wrap(Cpp.Copyable)*) -> Wrap(Cpp.Copyable)* {
// CHECK:STDOUT: %.loc12_16.2: %Copy.type.fb2 = converted constants.%Copyable, %Copy.facet.loc12_16.2 [concrete = constants.%Copy.facet.c39]
// CHECK:STDOUT: %Copy.specific_fn: <specific function> = specific_function %Copy.ref, @Copy.loc6(constants.%Copy.facet.c39) [concrete = constants.%Copy.specific_fn]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %Copy.call: init %Copyable = call %Copy.specific_fn(%c.ref) to %.loc10_28
// CHECK:STDOUT: return %Copy.call to %return
// CHECK:STDOUT: %Copy.call: init %Copyable = call %Copy.specific_fn(%c.ref) to %.loc10_34.1
// CHECK:STDOUT: return %Copy.call to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @EqualWitnesses(%p.param: %ptr.fba) -> %ptr.fba {
@@ -335,6 +335,6 @@ fn EqualWitnesses(p: Wrap(Cpp.Copyable)*) -> Wrap(Cpp.Copyable)* {
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @ptr.as.Copy.impl.Op(constants.%Wrap.99f) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc20_10.2: <bound method> = bound_method %p.ref, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.fba = call %bound_method.loc20_10.2(%p.ref)
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call to %return
// CHECK:STDOUT: return %ptr.as.Copy.impl.Op.call to %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: