96d6ca7e8c
Clang warns that a profile is out-of-date if it can't find a profile record for any function in a TU. This warning became noisy after llvm started allowing dead-stripping of instrumented functions. To fix this, this patch changes the existing profile out-of-date warning (-Wprofile-instr-out-of-date) so that it only complains about mismatched data. Further, it introduces a new, off-by-default warning about missing function data (-Wprofile-instr-missing). Differential Revision: https://reviews.llvm.org/D28867 llvm-svn: 301570
29 lines
1.2 KiB
C
29 lines
1.2 KiB
C
// Test that outdated data is ignored.
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// FIXME: It would be nice to use -verify here instead of FileCheck, but -verify
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// doesn't play well with warnings that have no line number.
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// RUN: llvm-profdata merge %S/Inputs/c-outdated-data.proftext -o %t.profdata
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-outdated-data.c %s -o /dev/null -emit-llvm -fprofile-instrument-use-path=%t.profdata 2>&1 | FileCheck %s -check-prefix=NO_MISSING
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// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-outdated-data.c %s -o /dev/null -emit-llvm -Wprofile-instr-missing -fprofile-instrument-use-path=%t.profdata 2>&1 | FileCheck %s -check-prefix=WITH_MISSING
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// NO_MISSING: warning: profile data may be out of date: of 3 functions, 1 has mismatched data that will be ignored
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// NO_MISSING-NOT: 1 has no data
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// WITH_MISSING: warning: profile data may be out of date: of 3 functions, 1 has mismatched data that will be ignored
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// WITH_MISSING: warning: profile data may be incomplete: of 3 functions, 1 has no data
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void no_usable_data() {
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int i = 0;
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if (i) {}
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}
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void no_data() {
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}
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int main(int argc, const char *argv[]) {
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no_usable_data();
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return 0;
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}
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