1 // RUN: %clang_cc1 -E %s > %t.src.cpp
2 // RUN: %clang_cc1 -E %s > %t.dst.cpp -DDEST
3 // RUN: clang-diff -dump-matches -s=0 %t.src.cpp %t.dst.cpp -- | FileCheck %s
4 //
5 // Test the bottom-up matching, with maxsize set to 0, so that the optimal matching will never be applied.
6 
7 #ifndef DEST
8 
9 void f1() { ; {{;}} }
10 void f2() { ;; {{;}} }
11 
12 #else
13 
14 // Jaccard similarity threshold is 0.5.
15 
16 void f1() {
17 // CompoundStmt: 3 matched descendants, subtree sizes 4 and 5
18 // Jaccard similarity = 3 / (4 + 5 - 3) = 3 / 6 >= 0.5
19 // CHECK: Match FunctionDecl: f1(void ())(1) to FunctionDecl: f1(void ())(1)
20 // CHECK: Match CompoundStmt(2) to CompoundStmt(2)
21 // CHECK: Match CompoundStmt(4) to CompoundStmt(3)
22 // CHECK: Match CompoundStmt(5) to CompoundStmt(4)
23 // CHECK: Match NullStmt(6) to NullStmt(5)
24   {{;}} ;;
25 }
26 
27 void f2() {
28 // CompoundStmt: 3 matched descendants, subtree sizes 4 and 5
29 // Jaccard similarity = 3 / (5 + 6 - 3) = 3 / 8 < 0.5
30 // CHECK-NOT: Match FunctionDecl(9)
31 // CHECK-NOT: Match CompoundStmt(10)
32 // CHECK: Match CompoundStmt(11) to CompoundStmt(10)
33 // CHECK: Match CompoundStmt(12) to CompoundStmt(11)
34 // CHECK: Match NullStmt(13) to NullStmt(12)
35 // CHECK-NOT: Match NullStmt(13)
36   {{;}} ;;;
37 }
38 
39 #endif
40