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761787d425
This relands https://github.com/llvm/llvm-project/pull/135119, after fixing crashes seen in LLDB CI reported here: https://github.com/llvm/llvm-project/pull/135119#issuecomment-2794910840 Fixes https://github.com/llvm/llvm-project/pull/135119 This changes the TemplateArgument representation to hold a flag indicating whether a tempalte argument of expression type is supposed to be canonical or not. This gets one step closer to solving https://github.com/llvm/llvm-project/issues/92292 This still doesn't try to unique as-written TSTs. While this would increase the amount of memory savings and make code dealing with the AST more well-behaved, profiling template argument lists is still too expensive for this to be worthwhile, at least for now. This also fixes the context creation of TSTs, so that they don't in some cases get incorrectly flagged as sugar over their own canonical form. This is captured in the test expectation change of some AST dumps. This fixes some places which were unnecessarily canonicalizing these TSTs.
142 lines
8.8 KiB
C++
142 lines
8.8 KiB
C++
// RUN: %clang_cc1 -std=c++23 -triple x86_64-linux-gnu -ast-dump -verify -xc++ < %s | FileCheck %s
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template <class A1, A1... A2> struct A {};
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using test1 = __make_integer_seq<A, int, 1>;
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// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:5:1, col:43> col:7 test1 '__make_integer_seq<A, int, 1>':'A<int, 0>'
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// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar alias
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// CHECK-NEXT: |-name: '__make_integer_seq' qualified
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// CHECK-NEXT: | `-BuiltinTemplateDecl {{.+}} __make_integer_seq
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// CHECK-NEXT: |-TemplateArgument template 'A'
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// CHECK-NEXT: | `-ClassTemplateDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:1, col:41> col:38 A
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// CHECK-NEXT: |-TemplateArgument type 'int'
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// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
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// CHECK-NEXT: |-TemplateArgument expr '1'
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// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:42> 'int'
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// CHECK-NEXT: | |-value: Int 1
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// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>' sugar
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// CHECK-NEXT: |-name: 'A' qualified
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// CHECK-NEXT: | `-ClassTemplateDecl {{.+}} A
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// CHECK-NEXT: |-TemplateArgument type 'int'
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// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
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// CHECK-NEXT: |-TemplateArgument expr '0'
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// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:42> 'int'
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// CHECK-NEXT: | |-value: Int 0
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// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 0
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// CHECK-NEXT: `-RecordType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>'
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// CHECK-NEXT: `-ClassTemplateSpecialization 0x{{[0-9A-Fa-f]+}} 'A'
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template <class B1, B1 B2> using B = __make_integer_seq<A, B1, B2>;
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using test2 = B<int, 1>;
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// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:1, col:23> col:7 test2 'B<int, 1>':'A<int, 0>'
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// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} 'B<int, 1>' sugar
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} 'B<int, 1>' sugar alias
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// CHECK-NEXT: |-name: 'B' qualified
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// CHECK-NEXT: | `-TypeAliasTemplateDecl {{.+}} B
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// CHECK-NEXT: |-TemplateArgument type 'int'
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// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
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// CHECK-NEXT: |-TemplateArgument expr '1'
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// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:22> 'int'
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// CHECK-NEXT: | |-value: Int 1
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// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:22> 'int' 1
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// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, 1>' sugar alias
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// CHECK-NEXT: |-name: '__make_integer_seq' qualified
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// CHECK-NEXT: | `-BuiltinTemplateDecl {{.+}} __make_integer_seq
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// CHECK-NEXT: |-TemplateArgument template 'A'
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// CHECK-NEXT: | `-ClassTemplateDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:1, col:41> col:38 A
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// CHECK-NEXT: |-TemplateArgument type 'int'
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// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'int' sugar class depth 0 index 0 B1 final
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// CHECK-NEXT: | |-TypeAliasTemplate 0x{{[0-9A-Fa-f]+}} 'B'
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// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
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// CHECK-NEXT: |-TemplateArgument expr '1'
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// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:64> 'int'
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// CHECK-NEXT: | |-value: Int 1
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// CHECK-NEXT: | `-SubstNonTypeTemplateParmExpr 0x{{[0-9A-Fa-f]+}} <col:64> 'int'
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// CHECK-NEXT: | |-NonTypeTemplateParmDecl 0x{{[0-9A-Fa-f]+}} <col:21, col:24> col:24 referenced 'B1' depth 0 index 1 B2
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// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:64> 'int' 1
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>' sugar
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// CHECK-NEXT: |-name: 'A' qualified
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// CHECK-NEXT: | `-ClassTemplateDecl {{.+}} A
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// CHECK-NEXT: |-TemplateArgument type 'int'
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// CHECK-NEXT: | `-SubstTemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'int' sugar class depth 0 index 0 B1 final
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// CHECK-NEXT: | |-TypeAliasTemplate 0x{{[0-9A-Fa-f]+}} 'B'
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// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
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// CHECK-NEXT: |-TemplateArgument expr '0'
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// CHECK-NEXT: | `-ConstantExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:64> 'int'
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// CHECK-NEXT: | |-value: Int 0
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// CHECK-NEXT: | `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:64> 'int' 0
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// CHECK-NEXT: `-RecordType 0x{{[0-9A-Fa-f]+}} 'A<int, 0>'
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// CHECK-NEXT: `-ClassTemplateSpecialization 0x{{[0-9A-Fa-f]+}} 'A'
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template <template <class T, T...> class S, class T, int N> struct C {
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using test3 = __make_integer_seq<S, T, N>;
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// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:3, col:43> col:9 test3 '__make_integer_seq<S, T, N>'
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// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<S, T, N>' sugar dependent
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<S, T, N>' dependent
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// CHECK-NEXT: |-name: '__make_integer_seq'
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// CHECK-NEXT: | `-BuiltinTemplateDecl {{.+}} __make_integer_seq
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// CHECK-NEXT: |-TemplateArgument template 'S'
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// CHECK-NEXT: | | `-TemplateTemplateParmDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:11, col:42> col:42 depth 0 index 0 S
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// CHECK-NEXT: |-TemplateArgument type 'T'
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// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'T' dependent depth 0 index 1
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// CHECK-NEXT: | `-TemplateTypeParm 0x{{[0-9A-Fa-f]+}} 'T'
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// CHECK-NEXT: `-TemplateArgument expr 'N'
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// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:42> 'T' <Dependent>
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// CHECK-NEXT: `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <col:42> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
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using test4 = __make_integer_seq<A, T, 1>;
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// CHECK: |-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:3, col:43> col:9 test4 '__make_integer_seq<A, T, 1>'
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// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, T, 1>' sugar dependent
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, T, 1>' dependent
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// CHECK-NEXT: |-name: '__make_integer_seq'
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// CHECK-NEXT: | `-BuiltinTemplateDecl {{.+}} __make_integer_seq
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// CHECK-NEXT: |-TemplateArgument template 'A'
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// CHECK-NEXT: | `-ClassTemplateDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:1, col:41> col:38 A
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// CHECK-NEXT: |-TemplateArgument type 'T'
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// CHECK-NEXT: | `-TemplateTypeParmType 0x{{[0-9A-Fa-f]+}} 'T' dependent depth 0 index 1
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// CHECK-NEXT: | `-TemplateTypeParm 0x{{[0-9A-Fa-f]+}} 'T'
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// CHECK-NEXT: `-TemplateArgument expr '1'
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// CHECK-NEXT: `-ImplicitCastExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:42> 'T' <Dependent>
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// CHECK-NEXT: `-IntegerLiteral 0x{{[0-9A-Fa-f]+}} <col:42> 'int' 1
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using test5 = __make_integer_seq<A, int, N>;
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// CHECK: `-TypeAliasDecl 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:3, col:45> col:9 test5 '__make_integer_seq<A, int, N>'
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// CHECK-NEXT: `-ElaboratedType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, N>' sugar dependent
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// CHECK-NEXT: `-TemplateSpecializationType 0x{{[0-9A-Fa-f]+}} '__make_integer_seq<A, int, N>' dependent
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// CHECK-NEXT: |-name: '__make_integer_seq'
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// CHECK-NEXT: | `-BuiltinTemplateDecl {{.+}} __make_integer_seq
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// CHECK-NEXT: |-TemplateArgument template 'A'
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// CHECK-NEXT: | `-ClassTemplateDecl 0x{{.+}} <line:{{.+}}:1, col:41> col:38 A
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// CHECK-NEXT: |-TemplateArgument type 'int'
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// CHECK-NEXT: | `-BuiltinType 0x{{[0-9A-Fa-f]+}} 'int'
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// CHECK-NEXT: `-TemplateArgument expr 'N'
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// CHECK-NEXT: `-DeclRefExpr 0x{{[0-9A-Fa-f]+}} <line:{{.+}}:44> 'int' NonTypeTemplateParm 0x{{[0-9A-Fa-f]+}} 'N' 'int'
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};
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// expected-no-diagnostics
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template <class T, class S> struct D;
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template <class T> struct D<T, __make_integer_seq<A, int, sizeof(T)>> {};
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template struct D<char, A<int, 0>>;
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template <class T, class S> struct E;
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template <class T> struct E<T, __make_integer_seq<A, T, 2>> {};
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template struct E<short, A<short, 0, 1>>;
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template <template <class A1, A1... A2> class T, class S> struct F;
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template <template <class A1, A1... A2> class T> struct F<T, __make_integer_seq<T, long, 3>> {};
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template struct F<A, A<long, 0, 1, 2>>;
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template <class T> struct G;
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template <class T> struct G<__make_integer_seq<A, T, 1>> {};
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template <class T> struct G<__make_integer_seq<A, T, 1U>> {};
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template <int S, class = __make_integer_seq<A, int, S>> struct H;
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template <int S, int... Is> struct H<S, A<int, Is...>> { };
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template <int S> void h(H<S>);
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void test_h() { h(H<5>{}); }
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