4a011ac84f
Currently both True/False counts were folded. It lost the information, "It is True or False before folding." It prevented recalling branch counts in merging template instantiations. In `llvm-cov`, a folded branch is shown as: - `[True: n, Folded]` - `[Folded, False n]` In the case If `n` is zero, a branch is reported as "uncovered". This is distinguished from "folded" branch. When folded branches are merged, `Folded` may be dissolved. In the coverage map, either `Counter` is `Zero`. Currently both were `Zero`. Since "partial fold" has been introduced, either case in `switch` is omitted as `Folded`. Each `case:` in `switch` is reported as `[True: n, Folded]`, since `False` count doesn't show meaningful value. When `switch` doesn't have `default:`, `switch (Cond)` is reported as `[Folded, False: n]`, since `True` count was just the sum of `case`(s). `switch` with `default` can be considered as "the statement that doesn't have any `False`(s)".
138 lines
8.6 KiB
C++
138 lines
8.6 KiB
C++
// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -std=c++1z -triple %itanium_abi_triple -main-file-name switch.cpp %s | FileCheck %s
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// CHECK: foo
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void foo(int i) { // CHECK-NEXT: File 0, [[@LINE]]:17 -> [[@LINE+11]]:2 = #0
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switch(i) { // CHECK-NEXT: Branch,File 0, [[@LINE]]:10 -> [[@LINE]]:11 = 0, ((#0 - #2) - #3)
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:13 -> [[@LINE+5]]:10 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:11 = #2
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return; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #2, 0
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:12 -> [[@LINE+1]]:3 = 0
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case 2: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:10 = #3
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break; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #3, 0
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} // CHECK-NEXT: Gap,File 0, [[@LINE]]:4 -> [[@LINE+1]]:3 = #1
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int x = 0; // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:2 = #1
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}
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int nop() { return 0; }
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// CHECK: bar
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void bar(int i) { // CHECK-NEXT: File 0, [[@LINE]]:17 -> [[@LINE+21]]:2 = #0
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switch (i) // CHECK-NEXT: Branch,File 0, [[@LINE]]:11 -> [[@LINE]]:12 = 0, #0
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; // CHECK-NEXT: File 0, [[@LINE]]:5 -> [[@LINE]]:6 = 0
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switch (i) { // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+17]]:2 = #1
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} // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:11 -> [[@LINE-1]]:12 = 0, #1
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switch (i) // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+14]]:2 = #2
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nop(); // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:11 -> [[@LINE-1]]:12 = 0, #2
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// CHECK-NEXT: File 0, [[@LINE-1]]:5 -> [[@LINE-1]]:10 = 0
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switch (i) // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+11]]:2 = #3
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case 1: // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:11 -> [[@LINE-1]]:12 = 0, (#3 - #5)
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// CHECK-NEXT: File 0, [[@LINE-1]]:3 -> [[@LINE+1]]:10 = #5
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nop(); // CHECK-NEXT: Branch,File 0, [[@LINE-2]]:3 -> [[@LINE-2]]:9 = #5, 0
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// CHECK-NEXT: File 0, [[@LINE+1]]:3 -> [[@LINE+7]]:2 = #4
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switch (i) { // CHECK-NEXT: Branch,File 0, [[@LINE]]:11 -> [[@LINE]]:12 = 0, (#4 - #7)
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nop(); // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:14 -> [[@LINE+2]]:10 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:10 = #7
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nop(); // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #7, 0
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}
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nop(); // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:2 = #6
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}
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// CHECK: baz
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void baz() { // CHECK-NEXT: File 0, [[@LINE]]:12 -> [[@LINE+5]]:2 = #0
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switch (int i = true ? nop() // CHECK: [[@LINE]]:26 -> [[@LINE]]:31 = #2
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: nop(); // CHECK-NEXT: [[@LINE]]:26 -> [[@LINE]]:31 = (#0 - #2)
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i) {} // CHECK-NEXT: Branch,File 0, [[@LINE]]:11 -> [[@LINE]]:12 = 0, #0
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nop(); // CHECK-NEXT: [[@LINE]]:3 -> [[@LINE+1]]:2 = #1
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}
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// CHECK-NEXT: main
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int main() { // CHECK-NEXT: File 0, [[@LINE]]:12 -> [[@LINE+39]]:2 = #0
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int i = 0;
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switch(i) { // CHECK-NEXT: Gap,File 0, [[@LINE]]:13 -> [[@LINE+8]]:10 = 0
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case 0: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+2]]:10 = #2
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i = 1; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #2, 0
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break; // CHECK-NEXT: Gap,File 0, [[@LINE]]:11 -> [[@LINE+1]]:3 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+2]]:10 = #3
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i = 2; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #3, 0
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break; // CHECK-NEXT: Gap,File 0, [[@LINE]]:11 -> [[@LINE+1]]:3 = 0
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default: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:10 = #4
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break; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:10 = #4, 0
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} // CHECK-NEXT: Gap,File 0, [[@LINE]]:4 -> [[@LINE+1]]:3 = #1
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switch(i) { // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+27]]:2 = #1
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case 0: // CHECK-NEXT: Gap,File 0, [[@LINE-1]]:13 -> [[@LINE+7]]:10 = 0
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i = 1; // CHECK-NEXT: File 0, [[@LINE-1]]:3 -> [[@LINE+1]]:10 = #6
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break; // CHECK-NEXT: Branch,File 0, [[@LINE-2]]:3 -> [[@LINE-2]]:9 = #6, 0
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:11 -> [[@LINE+1]]:3 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+3]]:10 = #7
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i = 2; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #7, 0
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default: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:10 = (#7 + #8)
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break; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:10 = #8, 0
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} // CHECK-NEXT: Gap,File 0, [[@LINE]]:4 -> [[@LINE+2]]:3 = #5
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// CHECK-NEXT: File 0, [[@LINE+1]]:3 -> [[@LINE+17]]:2 = #5
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switch(i) { // CHECK-NEXT: Branch,File 0, [[@LINE]]:10 -> [[@LINE]]:11 = 0, ((((#5 - #10) - #11) - #12) - #13)
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:13 -> [[@LINE+8]]:11 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+7]]:11 = #10
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// CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #10, 0
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case 2: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+5]]:11 = (#10 + #11)
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i = 11; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #11, 0
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case 3: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+3]]:11 = ((#10 + #11) + #12)
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// CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #12, 0
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case 4: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:11 = (((#10 + #11) + #12) + #13)
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i = 99; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #13, 0
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}
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foo(1); // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+3]]:11 = #9
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bar(1);
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baz();
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return 0;
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}
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// CHECK: pr44011
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int pr44011(int i) { // CHECK-NEXT: File 0, [[@LINE]]:20 -> {{.*}}:2 = #0
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switch (i) { // CHECK-NEXT: Gap,File 0, [[@LINE]]:14 -> [[@LINE+6]]:13 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:13 = #2
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return 0; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #2, 0
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:14 -> [[@LINE+1]]:3 = 0
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default: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:13 = #3
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return 1; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:10 = #3, 0
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}
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} // A region for counter #1 is missing due to the missing return.
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// FIXME: End location for "case 1" shouldn't point at the end of the switch.
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// CHECK: fallthrough
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int fallthrough(int i) { // CHECK-NEXT: File 0, [[@LINE]]:24 -> [[@LINE+14]]:2 = #0
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// CHECK-NEXT: Branch,File 0, [[@LINE+1]]:10 -> [[@LINE+1]]:11 = 0, ((((#0 - #2) - #3) - #4) - #5)
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switch(i) { // CHECK-NEXT: Gap,File 0, [[@LINE]]:13 -> [[@LINE+10]]:10 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+9]]:10 = #2
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i = 23; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #2, 0
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case 2: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+2]]:10 = (#2 + #3)
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i = 11; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #3, 0
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break; // CHECK-NEXT: Gap,File 0, [[@LINE]]:11 -> [[@LINE+1]]:3 = 0
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case 3: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+4]]:10 = #4
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// CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #4, 0
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case 4: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+2]]:10 = (#4 + #5)
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i = 99; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #5, 0
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break;
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}
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}
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void abort(void) __attribute((noreturn));
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// CHECK: noret
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int noret(int x) { // CHECK-NEXT: File 0, [[@LINE]]:18 -> [[@LINE+11]]:2
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switch (x) { // CHECK-NEXT: Gap,File 0, [[@LINE]]:14 -> [[@LINE+8]]:14 = 0
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default: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:12
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abort(); // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:10 = #2, 0
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:13 -> [[@LINE+1]]:3 = 0
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case 1: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:13
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return 5; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #3, 0
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// CHECK-NEXT: Gap,File 0, [[@LINE-1]]:14 -> [[@LINE+1]]:3 = 0
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case 2: // CHECK-NEXT: File 0, [[@LINE]]:3 -> [[@LINE+1]]:14
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return 10; // CHECK-NEXT: Branch,File 0, [[@LINE-1]]:3 -> [[@LINE-1]]:9 = #4, 0
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}
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}
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