89 lines · cpp
1// RUN: %check_clang_tidy %s altera-id-dependent-backward-branch %t -- -header-filter=.* "--" -cl-std=CLC++1.0 -c2 3void error() {4 // ==== Conditional Expressions ====5 int accumulator = 0;6 for (int i = 0; i < get_local_id(0); i++) {7 // CHECK-NOTES: :[[@LINE-1]]:19: warning: backward branch (for loop) is ID-dependent due to ID function call and may cause performance degradation [altera-id-dependent-backward-branch]8 accumulator++;9 }10 11 int j = 0;12 while (j < get_local_id(0)) {13 // CHECK-NOTES: :[[@LINE-1]]:10: warning: backward branch (while loop) is ID-dependent due to ID function call and may cause performance degradation [altera-id-dependent-backward-branch]14 accumulator++;15 }16 17 do {18 accumulator++;19 } while (j < get_local_id(0));20 // CHECK-NOTES: :[[@LINE-1]]:12: warning: backward branch (do loop) is ID-dependent due to ID function call and may cause performance degradation [altera-id-dependent-backward-branch]21 22 // ==== Assignments ====23 int ThreadID = get_local_id(0);24 25 while (j < ThreadID) {26 // CHECK-NOTES: :[[@LINE-1]]:10: warning: backward branch (while loop) is ID-dependent due to variable reference to 'ThreadID' and may cause performance degradation [altera-id-dependent-backward-branch]27 // CHECK-NOTES: :[[@LINE-4]]:3: note: assignment of ID-dependent variable ThreadID28 accumulator++;29 }30 31 do {32 accumulator++;33 } while (j < ThreadID);34 // CHECK-NOTES: :[[@LINE-1]]:12: warning: backward branch (do loop) is ID-dependent due to variable reference to 'ThreadID' and may cause performance degradation [altera-id-dependent-backward-branch]35 // CHECK-NOTES: :[[@LINE-12]]:3: note: assignment of ID-dependent variable ThreadID36 37 struct { int IDDepField; } Example;38 Example.IDDepField = get_local_id(0);39 40 for (int i = 0; i < Example.IDDepField; i++) {41 // CHECK-NOTES: :[[@LINE-1]]:19: warning: backward branch (for loop) is ID-dependent due to member reference to 'IDDepField' and may cause performance degradation [altera-id-dependent-backward-branch]42 // CHECK-NOTES: :[[@LINE-4]]:3: note: assignment of ID-dependent field IDDepField43 accumulator++;44 }45 46 while (j < Example.IDDepField) {47 // CHECK-NOTES: :[[@LINE-1]]:10: warning: backward branch (while loop) is ID-dependent due to member reference to 'IDDepField' and may cause performance degradation [altera-id-dependent-backward-branch]48 // CHECK-NOTES: :[[@LINE-10]]:3: note: assignment of ID-dependent field IDDepField49 accumulator++;50 }51 52 do {53 accumulator++;54 } while (j < Example.IDDepField);55 // CHECK-NOTES: :[[@LINE-1]]:12: warning: backward branch (do loop) is ID-dependent due to member reference to 'IDDepField' and may cause performance degradation [altera-id-dependent-backward-branch]56 // CHECK-NOTES: :[[@LINE-18]]:3: note: assignment of ID-dependent field IDDepField57 58 // ==== Inferred Assignments ====59 int ThreadID2 = ThreadID * 2;60 61 for (int i = 0; i < ThreadID2; i++) {62 // CHECK-NOTES: :[[@LINE-1]]:19: warning: backward branch (for loop) is ID-dependent due to variable reference to 'ThreadID2' and may cause performance degradation [altera-id-dependent-backward-branch]63 // CHECK-NOTES: :[[@LINE-4]]:3: note: inferred assignment of ID-dependent value from ID-dependent variable ThreadID64 accumulator++;65 }66 67 // ==== Unused Inferred Assignments ====68 int UnusedThreadID = Example.IDDepField; // OK: not used in any loops69 70 struct { int IDDepField; } UnusedStruct;71 UnusedStruct.IDDepField = ThreadID * 2; // OK: not used in any loops72}73 74void success() {75 int accumulator = 0;76 77 for (int i = 0; i < 1000; i++) {78 if (i < get_local_id(0)) {79 accumulator++;80 }81 }82}83 84template<char... STOP>85void gh55408(char const input[], int pos) {86 while (((input[pos] != STOP) && ...));87}88 89