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Usage of atomic counters for llvm code coverage

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This commit is contained in:
Evgeniy A. Dushistov 2023-05-11 17:35:01 +03:00
parent 4d941cd981
commit 6b58ff5cdf
2 changed files with 4 additions and 1 deletions
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3
compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
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@ -745,6 +745,9 @@ LLVMRustOptimize(
if (InstrProfileOutput) {
Options.InstrProfileOutput = InstrProfileOutput;
}
// cargo run tests in multhreading mode by default
// so use atomics for coverage counters
Options.Atomic = true;
MPM.addPass(InstrProfiling(Options, false));
}
);

2
tests/run-make/coverage-llvmir/filecheck.testprog.txt
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@ -36,7 +36,7 @@ CHECK-SAME: section "llvm.metadata"
CHECK: [[DEFINE_INTERNAL]] { {{.*}} } @_R{{[a-zA-Z0-9_]+}}testprog14will_be_called() unnamed_addr #{{[0-9]+}} {
CHECK-NEXT: start:
CHECK-NOT: [[DEFINE_INTERNAL]]
CHECK: %pgocount = load i64, {{i64\*|ptr}}
CHECK: atomicrmw add ptr
CHECK-SAME: @__profc__R{{[a-zA-Z0-9_]+}}testprog14will_be_called,
CHECK: declare void @llvm.instrprof.increment({{i8\*|ptr}}, i64, i32, i32) #[[LLVM_INSTRPROF_INCREMENT_ATTR:[0-9]+]]