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Rearrange convert: construct FacetAccessType from a facet value before impl lookup instead of after (#6113)

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This makes convert more consistent, it always makes a FacetAccessType
for a facet value, rather than only doing so after lookup returns. The
intention for this is that FacetAccessType will evaluate to
SymbolicBindingType in the future, so this will expose that constant
value to impl lookup instead of the original facet value, which will
avoid impl lookup having to deal with `.Self` or `BindSymbolicName`
specifically.
This commit is contained in:
Dana Jansens
2025-09-29 22:49:06 +00:00
committed by GitHub
parent 5abd214d9d
commit a6bb11f1cf
36 changed files with 158 additions and 125 deletions
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toolchain/check/testdata/function/generic/deduce_nested_facet_value.carbon
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+7 -7
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@@ -71,8 +71,8 @@ fn F() {
// CHECK:STDOUT: %facet_type: type = facet_type <@Y & @W> [concrete]
// CHECK:STDOUT: %E: %facet_type = bind_symbolic_name E, 0 [symbolic]
// CHECK:STDOUT: %pattern_type.50c: type = pattern_type %facet_type [concrete]
// CHECK:STDOUT: %Y.lookup_impl_witness: <witness> = lookup_impl_witness %E, @Y [symbolic]
// CHECK:STDOUT: %E.as_type: type = facet_access_type %E [symbolic]
// CHECK:STDOUT: %Y.lookup_impl_witness: <witness> = lookup_impl_witness %E, @Y [symbolic]
// CHECK:STDOUT: %Y.facet.682: %Y.type = facet_value %E.as_type, (%Y.lookup_impl_witness) [symbolic]
// CHECK:STDOUT: %CC.6f9: type = class_type @CC, @CC(%Y.facet.682) [symbolic]
// CHECK:STDOUT: %Z.impl_witness.3fa: <witness> = impl_witness file.%Z.impl_witness_table, @CC.as.Z.impl(%E) [symbolic]
@@ -137,7 +137,7 @@ fn F() {
// CHECK:STDOUT: } {
// CHECK:STDOUT: %CC.ref: %CC.type = name_ref CC, file.%CC.decl [concrete = constants.%CC.generic]
// CHECK:STDOUT: %E.ref: %facet_type = name_ref E, %E.loc19_14.1 [symbolic = %E.loc19_14.2 (constants.%E)]
// CHECK:STDOUT: %E.as_type.loc19_29.1: type = facet_access_type constants.%E [symbolic = %E.as_type.loc19_29.2 (constants.%E.as_type)]
// CHECK:STDOUT: %E.as_type.loc19_29.1: type = facet_access_type %E.ref [symbolic = %E.as_type.loc19_29.2 (constants.%E.as_type)]
// CHECK:STDOUT: %Y.facet.loc19_29.1: %Y.type = facet_value %E.as_type.loc19_29.1, (constants.%Y.lookup_impl_witness) [symbolic = %Y.facet.loc19_29.2 (constants.%Y.facet.682)]
// CHECK:STDOUT: %.loc19_29: %Y.type = converted %E.ref, %Y.facet.loc19_29.1 [symbolic = %Y.facet.loc19_29.2 (constants.%Y.facet.682)]
// CHECK:STDOUT: %CC.loc19_29.1: type = class_type @CC, @CC(constants.%Y.facet.682) [symbolic = %CC.loc19_29.2 (constants.%CC.6f9)]
@@ -195,8 +195,8 @@ fn F() {
// CHECK:STDOUT:
// CHECK:STDOUT: generic impl @CC.as.Z.impl(%E.loc19_14.1: %facet_type) {
// CHECK:STDOUT: %E.loc19_14.2: %facet_type = bind_symbolic_name E, 0 [symbolic = %E.loc19_14.2 (constants.%E)]
// CHECK:STDOUT: %Y.lookup_impl_witness: <witness> = lookup_impl_witness %E.loc19_14.2, @Y [symbolic = %Y.lookup_impl_witness (constants.%Y.lookup_impl_witness)]
// CHECK:STDOUT: %E.as_type.loc19_29.2: type = facet_access_type %E.loc19_14.2 [symbolic = %E.as_type.loc19_29.2 (constants.%E.as_type)]
// CHECK:STDOUT: %Y.lookup_impl_witness: <witness> = lookup_impl_witness %E.loc19_14.2, @Y [symbolic = %Y.lookup_impl_witness (constants.%Y.lookup_impl_witness)]
// CHECK:STDOUT: %Y.facet.loc19_29.2: %Y.type = facet_value %E.as_type.loc19_29.2, (%Y.lookup_impl_witness) [symbolic = %Y.facet.loc19_29.2 (constants.%Y.facet.682)]
// CHECK:STDOUT: %CC.loc19_29.2: type = class_type @CC, @CC(%Y.facet.loc19_29.2) [symbolic = %CC.loc19_29.2 (constants.%CC.6f9)]
// CHECK:STDOUT: %Z.impl_witness: <witness> = impl_witness file.%Z.impl_witness_table, @CC.as.Z.impl(%E.loc19_14.2) [symbolic = %Z.impl_witness (constants.%Z.impl_witness.3fa)]
@@ -235,13 +235,13 @@ fn F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %CC.ref: %CC.type = name_ref CC, file.%CC.decl [concrete = constants.%CC.generic]
// CHECK:STDOUT: %DD.ref: type = name_ref DD, file.%DD.decl [concrete = constants.%DD]
// CHECK:STDOUT: %Y.facet: %Y.type = facet_value constants.%DD, (constants.%Y.impl_witness) [concrete = constants.%Y.facet.4e8]
// CHECK:STDOUT: %Y.facet: %Y.type = facet_value %DD.ref, (constants.%Y.impl_witness) [concrete = constants.%Y.facet.4e8]
// CHECK:STDOUT: %.loc22_9: %Y.type = converted %DD.ref, %Y.facet [concrete = constants.%Y.facet.4e8]
// CHECK:STDOUT: %CC: type = class_type @CC, @CC(constants.%Y.facet.4e8) [concrete = constants.%CC.3b3]
// CHECK:STDOUT: %Z.ref: type = name_ref Z, file.%Z.decl [concrete = constants.%Z.type]
// CHECK:STDOUT: %facet_value: %facet_type = facet_value constants.%DD, (constants.%Y.impl_witness, constants.%W.impl_witness) [concrete = constants.%facet_value]
// CHECK:STDOUT: %.loc22_12.1: %facet_type = converted constants.%DD, %facet_value [concrete = constants.%facet_value]
// CHECK:STDOUT: %Z.facet: %Z.type = facet_value constants.%CC.3b3, (constants.%Z.impl_witness.8f8) [concrete = constants.%Z.facet]
// CHECK:STDOUT: %Z.facet: %Z.type = facet_value %CC, (constants.%Z.impl_witness.8f8) [concrete = constants.%Z.facet]
// CHECK:STDOUT: %.loc22_12.2: %Z.type = converted %CC, %Z.facet [concrete = constants.%Z.facet]
// CHECK:STDOUT: return
// CHECK:STDOUT: }
@@ -256,8 +256,8 @@ fn F() {
// CHECK:STDOUT:
// CHECK:STDOUT: specific @CC.as.Z.impl(constants.%E) {
// CHECK:STDOUT: %E.loc19_14.2 => constants.%E
// CHECK:STDOUT: %Y.lookup_impl_witness => constants.%Y.lookup_impl_witness
// CHECK:STDOUT: %E.as_type.loc19_29.2 => constants.%E.as_type
// CHECK:STDOUT: %Y.lookup_impl_witness => constants.%Y.lookup_impl_witness
// CHECK:STDOUT: %Y.facet.loc19_29.2 => constants.%Y.facet.682
// CHECK:STDOUT: %CC.loc19_29.2 => constants.%CC.6f9
// CHECK:STDOUT: %Z.impl_witness => constants.%Z.impl_witness.3fa
@@ -269,8 +269,8 @@ fn F() {
// CHECK:STDOUT:
// CHECK:STDOUT: specific @CC.as.Z.impl(constants.%facet_value) {
// CHECK:STDOUT: %E.loc19_14.2 => constants.%facet_value
// CHECK:STDOUT: %Y.lookup_impl_witness => constants.%Y.impl_witness
// CHECK:STDOUT: %E.as_type.loc19_29.2 => constants.%DD
// CHECK:STDOUT: %Y.lookup_impl_witness => constants.%Y.impl_witness
// CHECK:STDOUT: %Y.facet.loc19_29.2 => constants.%Y.facet.4e8
// CHECK:STDOUT: %CC.loc19_29.2 => constants.%CC.3b3
// CHECK:STDOUT: %Z.impl_witness => constants.%Z.impl_witness.8f8