forked from OSchip/llvm-project
87 lines
3.6 KiB
C++
87 lines
3.6 KiB
C++
// RUN: %check_clang_tidy %s altera-id-dependent-backward-branch %t -- -header-filter=.* "--" -cl-std=CL1.2 -c --include opencl-c.h
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typedef struct ExampleStruct {
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int IDDepField;
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} ExampleStruct;
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void error() {
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// ==== Conditional Expressions ====
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int accumulator = 0;
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for (int i = 0; i < get_local_id(0); i++) {
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// 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]
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accumulator++;
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}
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int j = 0;
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while (j < get_local_id(0)) {
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// 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]
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accumulator++;
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}
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do {
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accumulator++;
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} while (j < get_local_id(0));
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// 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]
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// ==== Assignments ====
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int ThreadID = get_local_id(0);
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while (j < ThreadID) {
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// CHECK-NOTES: :[[@LINE-3]]:3: note: assignment of ID-dependent variable ThreadID
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// CHECK-NOTES: :[[@LINE-2]]: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]
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accumulator++;
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}
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ExampleStruct Example;
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Example.IDDepField = get_local_id(0);
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// ==== Inferred Assignments ====
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int ThreadID2 = ThreadID * get_local_size(0);
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int ThreadID3 = Example.IDDepField; // OK: not used in any loops
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ExampleStruct UnusedStruct = {
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ThreadID * 2 // OK: not used in any loops
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};
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for (int i = 0; i < ThreadID2; i++) {
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// CHECK-NOTES: :[[@LINE-9]]:3: note: inferred assignment of ID-dependent value from ID-dependent variable ThreadID
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// CHECK-NOTES: :[[@LINE-2]]: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]
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accumulator++;
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}
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do {
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accumulator++;
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} while (j < ThreadID);
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// CHECK-NOTES: :[[@LINE-29]]:3: note: assignment of ID-dependent variable ThreadID
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// CHECK-NOTES: :[[@LINE-2]]: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]
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for (int i = 0; i < Example.IDDepField; i++) {
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// CHECK-NOTES: :[[@LINE-24]]:3: note: assignment of ID-dependent field IDDepField
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// CHECK-NOTES: :[[@LINE-2]]: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]
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accumulator++;
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}
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while (j < Example.IDDepField) {
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// CHECK-NOTES: :[[@LINE-30]]:3: note: assignment of ID-dependent field IDDepField
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// CHECK-NOTES: :[[@LINE-2]]: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]
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accumulator++;
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}
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do {
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accumulator++;
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} while (j < Example.IDDepField);
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// CHECK-NOTES: :[[@LINE-38]]:3: note: assignment of ID-dependent field IDDepField
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// CHECK-NOTES: :[[@LINE-2]]: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]
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}
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void success() {
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int accumulator = 0;
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for (int i = 0; i < 1000; i++) {
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if (i < get_local_id(0)) {
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accumulator++;
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}
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}
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}
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