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Stop special-casing empty structs. (#2849)

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This removes special-casing of empty structs, handling them as just a regular value instead of a builtin. Note the `{} as Type` is still special-cased.

In lowering, removes the test of calling a function using `{}` because it's missing the proper load/store. This setup notices that error whereas the prior worked due to said special-casing. Fixing this will need to be done as part of generally adding loads for variable uses.
This commit is contained in:
Jon Ross-Perkins
2023-05-26 10:33:17 -07:00
committed by GitHub
parent 1d56e165ef
commit 76151d1fff
13 changed files with 99 additions and 84 deletions
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toolchain/semantics/testdata/function/call/empty_struct.carbon
Vendored
+32 -18
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@@ -5,7 +5,7 @@
// AUTOUPDATE
// CHECK:STDOUT: cross_reference_irs_size: 1
// CHECK:STDOUT: callables: [
// CHECK:STDOUT: {param_refs: block2, return_type: nodeEmptyStructType},
// CHECK:STDOUT: {param_refs: block2, return_type: node+4},
// CHECK:STDOUT: {param_refs: block0},
// CHECK:STDOUT: ]
// CHECK:STDOUT: integer_literals: [
@@ -18,18 +18,26 @@
// CHECK:STDOUT: Main,
// CHECK:STDOUT: ]
// CHECK:STDOUT: types: [
// CHECK:STDOUT: nodeEmptyStructType,
// CHECK:STDOUT: node+0,
// CHECK:STDOUT: node+4,
// CHECK:STDOUT: node+10,
// CHECK:STDOUT: ]
// CHECK:STDOUT: nodes: [
// CHECK:STDOUT: {kind: VarStorage, type: nodeEmptyStructType},
// CHECK:STDOUT: {kind: BindName, arg0: str0, arg1: node+0, type: nodeEmptyStructType},
// CHECK:STDOUT: {kind: StructType, arg0: block0, type: nodeTypeType},
// CHECK:STDOUT: {kind: StructValue, arg0: block0, type: node+0},
// CHECK:STDOUT: {kind: VarStorage, type: node+0},
// CHECK:STDOUT: {kind: BindName, arg0: str0, arg1: node+2, type: node+0},
// CHECK:STDOUT: {kind: StructType, arg0: block0, type: nodeTypeType},
// CHECK:STDOUT: {kind: StructValue, arg0: block0, type: node+4},
// CHECK:STDOUT: {kind: FunctionDeclaration, arg0: str1, arg1: callable0},
// CHECK:STDOUT: {kind: ReturnExpression, arg0: node+0, type: nodeEmptyStructType},
// CHECK:STDOUT: {kind: FunctionDefinition, arg0: node+2, arg1: block4},
// CHECK:STDOUT: {kind: ReturnExpression, arg0: node+2, type: node+0},
// CHECK:STDOUT: {kind: FunctionDefinition, arg0: node+6, arg1: block4},
// CHECK:STDOUT: {kind: FunctionDeclaration, arg0: str2, arg1: callable1},
// CHECK:STDOUT: {kind: StubReference, arg0: nodeEmptyStruct, type: nodeEmptyStructType},
// CHECK:STDOUT: {kind: Call, arg0: block6, arg1: callable0, type: nodeEmptyStructType},
// CHECK:STDOUT: {kind: FunctionDefinition, arg0: node+5, arg1: block5},
// CHECK:STDOUT: {kind: StructType, arg0: block0, type: nodeTypeType},
// CHECK:STDOUT: {kind: StructValue, arg0: block0, type: node+10},
// CHECK:STDOUT: {kind: StubReference, arg0: node+11, type: node+10},
// CHECK:STDOUT: {kind: Call, arg0: block6, arg1: callable0, type: node+4},
// CHECK:STDOUT: {kind: FunctionDefinition, arg0: node+9, arg1: block5},
// CHECK:STDOUT: ]
// CHECK:STDOUT: node_blocks: [
// CHECK:STDOUT: [
@@ -37,25 +45,31 @@
// CHECK:STDOUT: [
// CHECK:STDOUT: node+0,
// CHECK:STDOUT: node+1,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+1,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+2,
// CHECK:STDOUT: node+4,
// CHECK:STDOUT: node+5,
// CHECK:STDOUT: node+8,
// CHECK:STDOUT: node+3,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+3,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+4,
// CHECK:STDOUT: node+5,
// CHECK:STDOUT: node+6,
// CHECK:STDOUT: node+8,
// CHECK:STDOUT: node+9,
// CHECK:STDOUT: node+14,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+7,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+6,
// CHECK:STDOUT: node+10,
// CHECK:STDOUT: node+11,
// CHECK:STDOUT: node+12,
// CHECK:STDOUT: node+13,
// CHECK:STDOUT: ],
// CHECK:STDOUT: [
// CHECK:STDOUT: node+12,
// CHECK:STDOUT: ],
// CHECK:STDOUT: ]