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)".
51 lines
2.4 KiB
C++
51 lines
2.4 KiB
C++
// RUN: %clang_cc1 -std=c++11 -triple %itanium_abi_triple -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -fcoverage-mcdc -mllvm -system-headers-coverage -emit-llvm-only -o - %s | FileCheck %s --check-prefixes=CHECK,W_SYS
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// RUN: %clang_cc1 -std=c++11 -triple %itanium_abi_triple -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -fcoverage-mcdc -emit-llvm-only -o - %s | FileCheck %s --check-prefixes=CHECK,X_SYS
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#ifdef IS_SYSHEADER
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#pragma clang system_header
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#define CONST 42
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#define EXPR1(x) (x)
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#define EXPR2(x) ((x) && (x))
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#else
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#define IS_SYSHEADER
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#include __FILE__
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// CHECK: _Z5func0i:
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int func0(int a) {
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// CHECK: Decision,File 0, [[@LINE+3]]:11 -> [[@LINE+3]]:21 = M:3, C:2
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// W_SYS: Expansion,File 0, [[@LINE+2]]:11 -> [[@LINE+2]]:16 = #0 (Expanded file = 1)
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// X_SYS: Branch,File 0, [[@LINE+1]]:11 -> [[@LINE+1]]:11 = #1, 0 [1,2,0]
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return (CONST && a);
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// CHECK: Branch,File 0, [[@LINE-1]]:20 -> [[@LINE-1]]:21 = #2, (#1 - #2) [2,0,0]
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// W_SYS: Branch,File 1, [[@LINE-16]]:15 -> [[@LINE-16]]:17 = #1, 0 [1,2,0]
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}
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// CHECK: _Z5func1ii:
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int func1(int a, int b) {
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// CHECK: Decision,File 0, [[@LINE+2]]:11 -> [[@LINE+2]]:21 = M:3, C:2
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// CHECK: Branch,File 0, [[@LINE+1]]:11 -> [[@LINE+1]]:12 = (#0 - #1), #1 [1,0,2]
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return (a || EXPR1(b));
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// W_SYS: Expansion,File 0, [[@LINE-1]]:16 -> [[@LINE-1]]:21 = #1 (Expanded file = 1)
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// W_SYS: Branch,File 1, [[@LINE-24]]:18 -> [[@LINE-24]]:21 = (#1 - #2), #2 [2,0,0]
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// X_SYS: Branch,File 0, [[@LINE-3]]:16 -> [[@LINE-3]]:16 = (#1 - #2), #2 [2,0,0]
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}
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// CHECK: _Z5func2ii:
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int func2(int a, int b) {
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// W_SYS: Decision,File 0, [[@LINE+5]]:11 -> [[@LINE+5]]:28 = M:4, C:3
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// X_SYS: Decision,File 0, [[@LINE+4]]:11 -> [[@LINE+4]]:28 = M:3, C:2
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// W_SYS: Expansion,File 0, [[@LINE+3]]:11 -> [[@LINE+3]]:16 = #0 (Expanded file = 1)
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// W_SYS: Expansion,File 0, [[@LINE+2]]:23 -> [[@LINE+2]]:28 = #1 (Expanded file = 2)
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// X_SYS: Branch,File 0, [[@LINE+1]]:11 -> [[@LINE+1]]:11 = #1, (#0 - #1) [1,2,0]
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return (EXPR2(a) && EXPR1(a));
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// W_SYS: Branch,File 1, [[@LINE-35]]:19 -> [[@LINE-35]]:22 = #3, (#0 - #3) [1,3,0]
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// W_SYS: Branch,File 1, [[@LINE-36]]:26 -> [[@LINE-36]]:29 = #4, (#3 - #4) [3,2,0]
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// W_SYS: Branch,File 2, [[@LINE-38]]:18 -> [[@LINE-38]]:21 = #2, (#1 - #2) [2,0,0]
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// X_SYS: Branch,File 0, [[@LINE-4]]:23 -> [[@LINE-4]]:23 = #2, (#1 - #2) [2,0,0]
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}
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#endif
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