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use a compiler-rt test
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‎compiler-rt/test/profile/Linux/instrprof-vtable-value-prof.cpp

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// REQUIRES: lld-available
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// RUN: rm -rf %t && split-file %s %t && cd %t
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//
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// RUN: %clangxx_pgogen -fuse-ld=lld -O2 -g -fprofile-generate=. -mllvm -enable-vtable-value-profiling test.cpp -o test
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// RUN: env LLVM_PROFILE_FILE=test.profraw ./test
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// Show vtable profiles from raw profile.
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// RUN: llvm-profdata show --function=main --ic-targets -show-vtables test.profraw | FileCheck %s --check-prefixes=COMMON,RAW
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// Generate indexed profile from raw profile and show the data.
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// RUN: llvm-profdata merge test.profraw -o test.profdata
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// RUN: llvm-profdata show --function=main --ic-targets --show-vtables test.profdata | FileCheck %s --check-prefixes=COMMON,INDEXED
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// Generate text profile from raw and indexed profiles respectively and show the data.
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// RUN: llvm-profdata merge --text test.profraw -o raw.proftext
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// RUN: llvm-profdata show --function=main --ic-targets --show-vtables --text raw.proftext | FileCheck %s --check-prefix=ICTEXT
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// RUN: llvm-profdata merge --text test.profdata -o indexed.proftext
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// RUN: llvm-profdata show --function=main --ic-targets --show-vtables --text indexed.proftext | FileCheck %s --check-prefix=ICTEXT
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// Generate indexed profile from text profiles and show the data
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// RUN: llvm-profdata merge --binary raw.proftext -o text.profraw
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// RUN: llvm-profdata show --function=main --ic-targets --show-vtables text.profraw | FileCheck %s --check-prefixes=COMMON,INDEXED
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// RUN: llvm-profdata merge --binary indexed.proftext -o text.profdata
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// RUN: llvm-profdata show --function=main --ic-targets --show-vtables text.profdata | FileCheck %s --check-prefixes=COMMON,INDEXED
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// COMMON: Counters:
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// COMMON-NEXT: main:
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// COMMON-NEXT: Hash: 0x0f9a16fe6d398548
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// COMMON-NEXT: Counters: 2
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// COMMON-NEXT: Indirect Call Site Count: 2
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// COMMON-NEXT: Number of instrumented vtables: 2
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// RAW: Indirect Target Results:
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// RAW-NEXT: [ 0, _ZN8Derived15func1Eii, 250 ] (25.00%)
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// RAW-NEXT: [ 0, test.cpp;_ZN12_GLOBAL__N_18Derived25func1Eii, 750 ] (75.00%)
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// RAW-NEXT: [ 1, _ZN8Derived15func2Eii, 250 ] (25.00%)
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// RAW-NEXT: [ 1, test.cpp;_ZN12_GLOBAL__N_18Derived25func2Eii, 750 ] (75.00%)
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// RAW-NEXT: VTable Results:
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// RAW-NEXT: [ 0, _ZTV8Derived1, 250 ] (25.00%)
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// RAW-NEXT: [ 0, test.cpp;_ZTVN12_GLOBAL__N_18Derived2E, 750 ] (75.00%)
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// RAW-NEXT: [ 1, _ZTV8Derived1, 250 ] (25.00%)
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// RAW-NEXT: [ 1, test.cpp;_ZTVN12_GLOBAL__N_18Derived2E, 750 ] (75.00%)
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// INDEXED: Indirect Target Results:
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// INDEXED-NEXT: [ 0, test.cpp;_ZN12_GLOBAL__N_18Derived25func1Eii, 750 ] (75.00%)
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// INDEXED-NEXT: [ 0, _ZN8Derived15func1Eii, 250 ] (25.00%)
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// INDEXED-NEXT: [ 1, test.cpp;_ZN12_GLOBAL__N_18Derived25func2Eii, 750 ] (75.00%)
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// INDEXED-NEXT: [ 1, _ZN8Derived15func2Eii, 250 ] (25.00%)
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// INDEXED-NEXT: VTable Results:
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// INDEXED-NEXT: [ 0, test.cpp;_ZTVN12_GLOBAL__N_18Derived2E, 750 ] (75.00%)
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// INDEXED-NEXT: [ 0, _ZTV8Derived1, 250 ] (25.00%)
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// INDEXED-NEXT: [ 1, test.cpp;_ZTVN12_GLOBAL__N_18Derived2E, 750 ] (75.00%)
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// INDEXED-NEXT: [ 1, _ZTV8Derived1, 250 ] (25.00%)
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// COMMON: Instrumentation level: IR entry_first = 0
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// COMMON-NEXT: Functions shown: 1
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// COMMON-NEXT: Total functions: 6
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// COMMON-NEXT: Maximum function count: 1000
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// COMMON-NEXT: Maximum internal block count: 250
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// COMMON-NEXT: Statistics for indirect call sites profile:
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// COMMON-NEXT: Total number of sites: 2
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// COMMON-NEXT: Total number of sites with values: 2
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// COMMON-NEXT: Total number of profiled values: 4
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// COMMON-NEXT: Value sites histogram:
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// COMMON-NEXT: NumTargets, SiteCount
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// COMMON-NEXT: 2, 2
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// COMMON-NEXT: Statistics for vtable profile:
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// COMMON-NEXT: Total number of sites: 2
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// COMMON-NEXT: Total number of sites with values: 2
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// COMMON-NEXT: Total number of profiled values: 4
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// COMMON-NEXT: Value sites histogram:
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// COMMON-NEXT: NumTargets, SiteCount
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// COMMON-NEXT: 2, 2
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// ICTEXT: :ir
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// ICTEXT: main
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// ICTEXT: # Func Hash:
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// ICTEXT: 1124236338992350536
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// ICTEXT: # Num Counters:
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// ICTEXT: 2
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// ICTEXT: # Counter Values:
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// ICTEXT: 1000
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// ICTEXT: 1
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// ICTEXT: # Num Value Kinds:
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// ICTEXT: 2
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// ICTEXT: # ValueKind = IPVK_IndirectCallTarget:
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// ICTEXT: 0
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// ICTEXT: # NumValueSites:
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// ICTEXT: 2
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// ICTEXT: 2
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// ICTEXT: test.cpp;_ZN12_GLOBAL__N_18Derived25func1Eii:750
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// ICTEXT: _ZN8Derived15func1Eii:250
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// ICTEXT: 2
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// ICTEXT: test.cpp;_ZN12_GLOBAL__N_18Derived25func2Eii:750
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// ICTEXT: _ZN8Derived15func2Eii:250
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// ICTEXT: # ValueKind = IPVK_VTableTarget:
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// ICTEXT: 2
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// ICTEXT: # NumValueSites:
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// ICTEXT: 2
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// ICTEXT: 2
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// ICTEXT: test.cpp;_ZTVN12_GLOBAL__N_18Derived2E:750
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// ICTEXT: _ZTV8Derived1:250
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// ICTEXT: 2
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// ICTEXT: test.cpp;_ZTVN12_GLOBAL__N_18Derived2E:750
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// ICTEXT: _ZTV8Derived1:250
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//--- test.cpp
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#include <cstdio>
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#include <cstdlib>
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class Base {
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public:
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virtual int func1(int a, int b) = 0;
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virtual int func2(int a, int b) = 0;
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};
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class Derived1 : public Base {
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public:
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int func1(int a, int b) override { return a + b; }
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int func2(int a, int b) override { return a * b; }
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};
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namespace {
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class Derived2 : public Base {
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public:
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int func1(int a, int b) override { return a - b; }
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int func2(int a, int b) override { return a * (a - b); }
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};
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} // namespace
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__attribute__((noinline)) Base *createType(int a) {
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Base *base = nullptr;
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if (a % 4 == 0)
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base = new Derived1();
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else
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base = new Derived2();
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return base;
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}
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int main(int argc, char **argv) {
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int sum = 0;
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for (int i = 0; i < 1000; i++) {
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int a = rand();
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int b = rand();
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Base *ptr = createType(i);
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sum += ptr->func1(a, b) + ptr->func2(b, a);
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}
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printf("sum is %d\n", sum);
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return 0;
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}

‎llvm/test/tools/llvm-profdata/Inputs/update_vtable_value_prof_inputs.sh

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‎llvm/test/tools/llvm-profdata/Inputs/vtable-value-prof-basic.profraw

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‎llvm/test/tools/llvm-profdata/Inputs/vtable-value-prof.proftext

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