9f2967bcfe
This is an enhancement to LLVM Source-Based Code Coverage in clang to track how many times individual branch-generating conditions are taken (evaluate to TRUE) and not taken (evaluate to FALSE). Individual conditions may comprise larger boolean expressions using boolean logical operators. This functionality is very similar to what is supported by GCOV except that it is very closely anchored to the ASTs. Differential Revision: https://reviews.llvm.org/D84467
49 lines
2.2 KiB
C
49 lines
2.2 KiB
C
// RUN: %clang_cc1 -mllvm -emptyline-comment-coverage=false -fprofile-instrument=clang -fcoverage-mapping -dump-coverage-mapping -emit-llvm-only -main-file-name loopmacro.c %s | FileCheck %s
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// CHECK: main
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// CHECK-NEXT: File 0, {{[0-9]+}}:12 -> {{[0-9]+}}:2 = #0
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// CHECK-NEXT: File 0, {{[0-9]+}}:6 -> {{[0-9]+}}:4 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 0, {{[0-9]+}}:7 -> {{[0-9]+}}:20 = (#0 + #1)
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// CHECK-NEXT: File 0, {{[0-9]+}}:12 -> {{[0-9]+}}:30 = (#0 + #1)
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// CHECK-NEXT: Branch,File 0, {{[0-9]+}}:12 -> {{[0-9]+}}:30 = #1, #0
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// CHECK-NEXT: File 1, [[@LINE+4]]:4 -> [[@LINE+6]]:23 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 1, [[@LINE+3]]:5 -> [[@LINE+3]]:16 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 1, [[@LINE+3]]:16 -> [[@LINE+3]]:21 = (#0 + #1)
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#define INSERT_STRING(s, match_head) \
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(UPDATE_HASH(ins_h, window[(s) + MIN_MATCH-1]), \
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prev[(s) & WMASK] = match_head = head[ins_h], \
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head[ins_h] = (s))
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// CHECK-NEXT: File 2, [[@LINE+3]]:26 -> [[@LINE+3]]:66 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 2, [[@LINE+2]]:38 -> [[@LINE+2]]:45 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 2, [[@LINE+1]]:56 -> [[@LINE+1]]:65 = (#0 + #1)
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#define UPDATE_HASH(h,c) (h = (((h)<<H_SHIFT) ^ (c)) & HASH_MASK)
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// CHECK-NEXT: File 3, [[@LINE+1]]:15 -> [[@LINE+1]]:21 = (#0 + #1)
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#define WMASK 0xFFFF
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// CHECK-NEXT: File 4, [[@LINE+4]]:18 -> [[@LINE+4]]:53 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 4, [[@LINE+3]]:20 -> [[@LINE+3]]:29 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 4, [[@LINE+2]]:30 -> [[@LINE+2]]:39 = (#0 + #1)
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// CHECK-NEXT: Expansion,File 4, [[@LINE+1]]:43 -> [[@LINE+1]]:52 = (#0 + #1)
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#define H_SHIFT ((HASH_BITS+MIN_MATCH-1)/MIN_MATCH)
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// CHECK-NEXT: File 5, [[@LINE+1]]:19 -> [[@LINE+1]]:25 = (#0 + #1)
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#define HASH_MASK 0xFFFF
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// CHECK-NEXT: File 6, [[@LINE+1]]:20 -> [[@LINE+1]]:22 = (#0 + #1)
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#define HASH_BITS 15
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// CHECK-NEXT: File 7, [[@LINE+2]]:20 -> [[@LINE+2]]:21 = (#0 + #1)
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// CHECK-NEXT: File 8, [[@LINE+1]]:20 -> [[@LINE+1]]:21 = (#0 + #1)
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#define MIN_MATCH 3
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int main() {
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int strstart = 0;
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int hash_head = 2;
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int prev_length = 5;
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int ins_h = 1;
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int prev[32<<10] = { 0 };
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int head[32<<10] = { 0 };
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int window[1024] = { 0 };
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do {
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strstart++;
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INSERT_STRING(strstart, hash_head);
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} while (--prev_length != 0);
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}
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