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50 lines
1.8 KiB
Plaintext
50 lines
1.8 KiB
Plaintext
# Test not to trigger the assertion failure in llvm-cov with empty bitmap.
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# REQUIRES: asserts
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# mcdc-maxbs.o contains the record:
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#
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# sub:
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# Decision,File 0, 5:11 -> 5:59 = M:1, C:4
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# Branch,File 0, 5:12 -> 5:20 = #5, ((#0 - #1) - #5) [1,3,2]
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# Branch,File 0, 5:24 -> 5:32 = #6, (#5 - #6) [3,0,2]
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# Branch,File 0, 5:38 -> 5:46 = #7, (#4 - #7) [2,4,0]
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# Branch,File 0, 5:50 -> 5:58 = #8, (#7 - #8) [4,0,0]
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# Decision,File 1, 1:23 -> 1:47 = M:0, C:2
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# Branch,File 1, 1:23 -> 1:33 = #2, (#0 - #2) [1,2,0]
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# Branch,File 1, 1:37 -> 1:47 = #3, (#2 - #3) [2,0,0]
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#
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# With the previous implementation, `Decision M:0 C:2` was picked up as
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# the last `Decision`.
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# The size of the bitmap was reported as `1` in this case.
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# Actually, the largest `Decision` is `M:1 C:4` and the size should be `3`
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# (Idx=1, len=16 bits).
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#
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# When a corresponding bitmap was not emitted, the dummy zero-ed bitmap is
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# allocated as `BitmapBytes` with `getMaxBitmapSize(Record) + 1`
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# (in this case, `1 + 1`, less than `3`).
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# It may overrun and would trigger `unexpected test vector`
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# by trailing uninitialized garbage.
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# RUN: llvm-profdata merge %S/Inputs/mcdc-maxbs.proftext -o %t.profdata
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# RUN: llvm-cov report --show-mcdc-summary %S/Inputs/mcdc-maxbs.o -instr-profile %t.profdata
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# Instructions for regenerating the test object:
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cd %S/Inputs # or copy %S/Inputs/mcdc-maxbs.c into the working directory
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clang -Os -fcoverage-mcdc -fprofile-instr-generate \
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-fcoverage-mapping -fcoverage-compilation-dir=. \
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-mllvm -enable-name-compression=false \
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mcdc-maxbs.c -c -o mcdc-maxbs.o
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# Instructions for regenerating the test vector:
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clang -fprofile-instr-generate mcdc-maxbs.o
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rm -f default.prof*
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# Doesn't crash if argc > 1
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./a.out
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llvm-profdata merge --sparse -o default.profdata default.profraw
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llvm-profdata merge --text -o mcdc-maxbs.proftext default.profdata
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