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RocksDB for Erlang

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rocksdb deps snappy third_party benchmark test state_assembly_test.cc
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deps/snappy/third_party/benchmark/test/state_assembly_test.cc 

#include <benchmark/benchmark.h>



#ifdef __clang__

#pragma clang diagnostic ignored "-Wreturn-type"

#endif



// clang-format off

extern "C" {

  extern int ExternInt;

  benchmark::State& GetState();

  void Fn();

}

// clang-format on



using benchmark::State;



// CHECK-LABEL: test_for_auto_loop:

extern "C" int test_for_auto_loop() {

  State& S = GetState();

  int x = 42;

  // CHECK: 	[[CALL:call(q)*]]	_ZN9benchmark5State16StartKeepRunningEv

  // CHECK-NEXT: testq %rbx, %rbx

  // CHECK-NEXT: je [[LOOP_END:.*]]



  for (auto _ : S) {

    // CHECK: .L[[LOOP_HEAD:[a-zA-Z0-9_]+]]:

    // CHECK-GNU-NEXT: subq $1, %rbx

    // CHECK-CLANG-NEXT: {{(addq \$1, %rax|incq %rax|addq \$-1, %rbx)}}

    // CHECK-NEXT: jne .L[[LOOP_HEAD]]

    benchmark::DoNotOptimize(x);

  }

  // CHECK: [[LOOP_END]]:

  // CHECK: [[CALL]]	_ZN9benchmark5State17FinishKeepRunningEv



  // CHECK: movl $101, %eax

  // CHECK: ret

  return 101;

}



// CHECK-LABEL: test_while_loop:

extern "C" int test_while_loop() {

  State& S = GetState();

  int x = 42;



  // CHECK: j{{(e|mp)}} .L[[LOOP_HEADER:[a-zA-Z0-9_]+]]

  // CHECK-NEXT: .L[[LOOP_BODY:[a-zA-Z0-9_]+]]:

  while (S.KeepRunning()) {

    // CHECK-GNU-NEXT: subq $1, %[[IREG:[a-z]+]]

    // CHECK-CLANG-NEXT: {{(addq \$-1,|decq)}} %[[IREG:[a-z]+]]

    // CHECK: movq %[[IREG]], [[DEST:.*]]

    benchmark::DoNotOptimize(x);

  }

  // CHECK-DAG: movq [[DEST]], %[[IREG]]

  // CHECK-DAG: testq %[[IREG]], %[[IREG]]

  // CHECK-DAG: jne .L[[LOOP_BODY]]

  // CHECK-DAG: .L[[LOOP_HEADER]]:



  // CHECK: cmpb $0

  // CHECK-NEXT: jne .L[[LOOP_END:[a-zA-Z0-9_]+]]

  // CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv



  // CHECK: .L[[LOOP_END]]:

  // CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv



  // CHECK: movl $101, %eax

  // CHECK: ret

  return 101;

}