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Recommit: "[llvm-exegesis] Improve error reporting in Target.cpp" 

Summary: Commit 141915963b was reverted in
abe01e17f6 because it broke builds testing
without libpfm. A preparatory commit <commit_sha1> was added to enable
this recommit.

Original commit message:

Followup to D74085.
Replace the use of `report_fatal_error()` with returning the error to
`llvm-exegesis.cpp` and handling it there.

Differential Revision: https://reviews.llvm.org/D74113
This commit is contained in:
Miloš Stojanović 2020-02-06 18:21:01 +01:00
parent 830af528a5
commit 4bd40f71a7
3 changed files with 10 additions and 8 deletions
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12
llvm/tools/llvm-exegesis/lib/Target.cpp
View File

@ -53,7 +53,7 @@ std::unique_ptr<SnippetGenerator> ExegesisTarget::createSnippetGenerator(
return nullptr;
}
std::unique_ptr<BenchmarkRunner>
Expected<std::unique_ptr<BenchmarkRunner>>
ExegesisTarget::createBenchmarkRunner(InstructionBenchmark::ModeE Mode,
const LLVMState &State) const {
PfmCountersInfo PfmCounters = State.getPfmCounters();
@ -66,14 +66,16 @@ ExegesisTarget::createBenchmarkRunner(InstructionBenchmark::ModeE Mode,
const char *ModeName = Mode == InstructionBenchmark::Latency
? "latency"
: "inverse_throughput";
report_fatal_error(Twine("can't run '").concat(ModeName).concat("' mode, "
"sched model does not define a cycle counter."));
return make_error<Failure>(
Twine("can't run '")
.concat(ModeName)
.concat("' mode, sched model does not define a cycle counter."));
}
return createLatencyBenchmarkRunner(State, Mode);
case InstructionBenchmark::Uops:
if (!PfmCounters.UopsCounter && !PfmCounters.IssueCounters)
report_fatal_error("can't run 'uops' mode, sched model does not define "
"uops or issue counters.");
return make_error<Failure>("can't run 'uops' mode, sched model does not "
"define uops or issue counters.");
return createUopsBenchmarkRunner(State);
}
return nullptr;

2
llvm/tools/llvm-exegesis/lib/Target.h
View File

@ -132,7 +132,7 @@ public:
const LLVMState &State,
const SnippetGenerator::Options &Opts) const;
// Creates a benchmark runner for the given mode.
std::unique_ptr<BenchmarkRunner>
Expected<std::unique_ptr<BenchmarkRunner>>
createBenchmarkRunner(InstructionBenchmark::ModeE Mode,
const LLVMState &State) const;

4
llvm/tools/llvm-exegesis/llvm-exegesis.cpp
View File

@ -263,8 +263,8 @@ void benchmarkMain() {
const LLVMState State(CpuName);
const std::unique_ptr<BenchmarkRunner> Runner =
State.getExegesisTarget().createBenchmarkRunner(BenchmarkMode, State);
const std::unique_ptr<BenchmarkRunner> Runner = ExitOnErr(
State.getExegesisTarget().createBenchmarkRunner(BenchmarkMode, State));
if (!Runner) {
ExitWithError("cannot create benchmark runner");
}