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llvm-project/clang/test/AST/nrvo.c

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[clang] disable implicit moves when not in CPlusPLus See PR51842. This fixes an assert firing in the static analyzer, triggered by implicit moves in blocks in C mode: This also simplifies the AST a little bit when compiling non C++ code, as the xvalue implicit casts are not inserted. We keep and test that the nrvo flag is still being set on the VarDecls, as that is still a bit beneficial while not really making anything more complicated. Signed-off-by: Matheus Izvekov <mizvekov@gmail.com> Reviewed By: NoQ Differential Revision: https://reviews.llvm.org/D109654
2021-09-12 07:11:02 +08:00
// RUN: %clang_cc1 -ast-dump -fblocks %s | FileCheck -strict-whitespace %s
struct A {};
Use functions with prototypes when appropriate; NFC A significant number of our tests in C accidentally use functions without prototypes. This patch converts the function signatures to have a prototype for the situations where the test is not specific to K&R C declarations. e.g., void func(); becomes void func(void); This is the fifth batch of tests being updated (there are a significant number of other tests left to be updated). Note, the behavior of -ast-print is broken. It prints functions with a prototype (void) as if they have no prototype () in C. Some tests need to disable strict prototype checking when recompiling the results of an -ast-print invocation.
2022-02-09 22:10:10 +08:00
struct A f1(void) {
// CHECK: FunctionDecl 0x{{[^ ]*}} <line:[[@LINE-1]]:1, line:{{[^:]*}}:1> line:[[@LINE-1]]:10 f1 'struct A (void)'
// CHECK-NEXT: CompoundStmt 0x{{[^ ]*}} <col:19, line:{{[^:]*}}:1>
[clang] disable implicit moves when not in CPlusPLus See PR51842. This fixes an assert firing in the static analyzer, triggered by implicit moves in blocks in C mode: This also simplifies the AST a little bit when compiling non C++ code, as the xvalue implicit casts are not inserted. We keep and test that the nrvo flag is still being set on the VarDecls, as that is still a bit beneficial while not really making anything more complicated. Signed-off-by: Matheus Izvekov <mizvekov@gmail.com> Reviewed By: NoQ Differential Revision: https://reviews.llvm.org/D109654
2021-09-12 07:11:02 +08:00
struct A a;
// CHECK-NEXT: DeclStmt 0x{{[^ ]*}} <line:[[@LINE-1]]:3, col:13>
// CHECK-NEXT: VarDecl 0x{{[^ ]*}} <col:3, col:12> col:12 used a 'struct A':'struct A' nrvo
return a;
// CHECK-NEXT: ReturnStmt 0x{{[^ ]*}} <line:[[@LINE-1]]:3, col:10>
// CHECK-NEXT: ImplicitCastExpr 0x{{[^ ]*}} <col:10> 'struct A':'struct A' <LValueToRValue>
// CHECK-NEXT: DeclRefExpr 0x{{[^ ]*}} <col:10> 'struct A':'struct A' lvalue Var 0x{{[^ ]*}} 'a' 'struct A':'struct A'
}
Use functions with prototypes when appropriate; NFC A significant number of our tests in C accidentally use functions without prototypes. This patch converts the function signatures to have a prototype for the situations where the test is not specific to K&R C declarations. e.g., void func(); becomes void func(void); This is the fifth batch of tests being updated (there are a significant number of other tests left to be updated). Note, the behavior of -ast-print is broken. It prints functions with a prototype (void) as if they have no prototype () in C. Some tests need to disable strict prototype checking when recompiling the results of an -ast-print invocation.
2022-02-09 22:10:10 +08:00
void f2(void) {
[clang] disable implicit moves when not in CPlusPLus See PR51842. This fixes an assert firing in the static analyzer, triggered by implicit moves in blocks in C mode: This also simplifies the AST a little bit when compiling non C++ code, as the xvalue implicit casts are not inserted. We keep and test that the nrvo flag is still being set on the VarDecls, as that is still a bit beneficial while not really making anything more complicated. Signed-off-by: Matheus Izvekov <mizvekov@gmail.com> Reviewed By: NoQ Differential Revision: https://reviews.llvm.org/D109654
2021-09-12 07:11:02 +08:00
(void)^{
// CHECK: BlockDecl 0x{{[^ ]*}} <line:[[@LINE-1]]:9, line:{{[^:]*}}:3> line:[[@LINE-1]]:9
// CHECK-NEXT: CompoundStmt 0x{{[^ ]*}} <col:10, line:{{[^:]*}}:3>
struct A a;
// CHECK-NEXT: DeclStmt 0x{{[^ ]*}} <line:[[@LINE-1]]:5, col:15>
// CHECK-NEXT: VarDecl 0x{{[^ ]*}} <col:5, col:14> col:14 used a 'struct A':'struct A' nrvo
return a;
// CHECK-NEXT: ReturnStmt 0x{{[^ ]*}} <line:[[@LINE-1]]:5, col:12>
// CHECK-NEXT: ImplicitCastExpr 0x{{[^ ]*}} <col:12> 'struct A':'struct A' <LValueToRValue>
// CHECK-NEXT: DeclRefExpr 0x{{[^ ]*}} <col:12> 'struct A':'struct A' lvalue Var 0x{{[^ ]*}} 'a' 'struct A':'struct A'
}();
}