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Remove ValueParamPattern case from deduction (#6869)

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This case is redundant: when deducing against a runtime parameter
pattern, the type is all that matters, and the type is added to the
deduction earlier. Additionally deducing the same argument against
parameter's subpattern just creates duplicate work, because the
subpattern has the same type.
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Geoff Romer authored and GitHub committed 2026-03-10 21:15:38 +00:00
1 parent 6304df1db9
commit ba6257891e
28 files changed
+539 -744
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toolchain/check/testdata/interop/cpp/function/pointer.carbon
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+8 -10
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@@ -1604,18 +1604,16 @@ fn F() {
// CHECK:STDOUT: %Some.ref: %Optional.Some.type.031 = name_ref Some, %.loc9_32 [concrete = constants.%Optional.Some.16d]
// CHECK:STDOUT: %s.ref: ref %S = name_ref s, %s
// CHECK:STDOUT: %addr: %ptr.5c7 = addr_of %s.ref
// CHECK:STDOUT: %OptionalStorage.facet.loc9_40.1: %OptionalStorage.type = facet_value constants.%ptr.5c7, (constants.%OptionalStorage.impl_witness.ba1) [concrete = constants.%OptionalStorage.facet]
// CHECK:STDOUT: %.loc9_40.1: %OptionalStorage.type = converted constants.%ptr.5c7, %OptionalStorage.facet.loc9_40.1 [concrete = constants.%OptionalStorage.facet]
// CHECK:STDOUT: %OptionalStorage.facet.loc9_40.2: %OptionalStorage.type = facet_value constants.%ptr.5c7, (constants.%OptionalStorage.impl_witness.ba1) [concrete = constants.%OptionalStorage.facet]
// CHECK:STDOUT: %.loc9_40.2: %OptionalStorage.type = converted constants.%ptr.5c7, %OptionalStorage.facet.loc9_40.2 [concrete = constants.%OptionalStorage.facet]
// CHECK:STDOUT: %OptionalStorage.facet.loc9_40: %OptionalStorage.type = facet_value constants.%ptr.5c7, (constants.%OptionalStorage.impl_witness.ba1) [concrete = constants.%OptionalStorage.facet]
// CHECK:STDOUT: %.loc9_40.1: %OptionalStorage.type = converted constants.%ptr.5c7, %OptionalStorage.facet.loc9_40 [concrete = constants.%OptionalStorage.facet]
// CHECK:STDOUT: %Optional.Some.specific_fn: <specific function> = specific_function %Some.ref, @Optional.Some(constants.%OptionalStorage.facet) [concrete = constants.%Optional.Some.specific_fn]
// CHECK:STDOUT: %Optional.Some.call: init %Optional.065 = call %Optional.Some.specific_fn(%addr)
// CHECK:STDOUT: %.loc9_40.3: ref %Optional.065 = temporary_storage
// CHECK:STDOUT: %.loc9_40.4: ref %Optional.065 = temporary %.loc9_40.3, %Optional.Some.call
// CHECK:STDOUT: %.loc9_40.5: %Optional.065 = acquire_value %.loc9_40.4
// CHECK:STDOUT: %foo.call: init %empty_tuple.type = call imports.%foo.decl(%.loc9_40.5)
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %.loc9_40.4, constants.%Destroy.Op.651ba6.2
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%.loc9_40.4)
// CHECK:STDOUT: %.loc9_40.2: ref %Optional.065 = temporary_storage
// CHECK:STDOUT: %.loc9_40.3: ref %Optional.065 = temporary %.loc9_40.2, %Optional.Some.call
// CHECK:STDOUT: %.loc9_40.4: %Optional.065 = acquire_value %.loc9_40.3
// CHECK:STDOUT: %foo.call: init %empty_tuple.type = call imports.%foo.decl(%.loc9_40.4)
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %.loc9_40.3, constants.%Destroy.Op.651ba6.2
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%.loc9_40.3)
// CHECK:STDOUT: %S.cpp_destructor.bound: <bound method> = bound_method %s.var, constants.%S.cpp_destructor
// CHECK:STDOUT: %S.cpp_destructor.call: init %empty_tuple.type = call %S.cpp_destructor.bound(%s.var)
// CHECK:STDOUT: <elided>