1351d17826
(The profile format change is split into a standalone change into https://github.com/llvm/llvm-project/pull/81691) * For InstrFDO value profiling, implement instrumentation and lowering for virtual table address. * This is controlled by `-enable-vtable-value-profiling` and off by default. * When the option is on, raw profiles will carry serialized `VTableProfData` structs and compressed vtables as payloads. * Implement profile reader and writer support * Raw profile reader is used by `llvm-profdata` but not compiler. Raw profile reader will construct InstrProfSymtab with symbol names, and map profiled runtime address to vtable symbols. * Indexed profile reader is used by `llvm-profdata` and compiler. When initialized, the reader stores a pointer to the beginning of in-memory compressed vtable names and the length of string. When used in `llvm-profdata`, reader decompress the string to show symbols of a profiled site. When used in compiler, string decompression doesn't happen since IR is used to construct InstrProfSymtab. * Indexed profile writer collects the list of vtable names, and stores that to index profiles. * Text profile reader and writer support are added but mostly follow the implementation for indirect-call value type. * `llvm-profdata show -show-vtables <args> <profile>` is implemented. rfc in https://discourse.llvm.org/t/rfc-dynamic-type-profiling-and-optimizations-in-llvm/74600#pick-instrumentation-points-and-instrument-runtime-types-7
75 lines
1.1 KiB
Plaintext
75 lines
1.1 KiB
Plaintext
# IR level Instrumentation Flag
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:ir
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_Z10createTypei
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# Func Hash:
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146835647075900052
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# Num Counters:
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2
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# Counter Values:
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750
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250
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_ZN8Derived15func1Eii
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# Func Hash:
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742261418966908927
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# Num Counters:
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1
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# Counter Values:
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250
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_ZN8Derived15func2Eii
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# Func Hash:
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742261418966908927
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# Num Counters:
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1
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# Counter Values:
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250
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main
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# Func Hash:
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1124236338992350536
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# Num Counters:
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2
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# Counter Values:
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1000
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1
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# Num Value Kinds:
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2
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# ValueKind = IPVK_IndirectCallTarget:
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0
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# NumValueSites:
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2
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2
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vtable_prof.cc;_ZN12_GLOBAL__N_18Derived25func1Eii:750
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_ZN8Derived15func1Eii:250
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2
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vtable_prof.cc;_ZN12_GLOBAL__N_18Derived25func2Eii:750
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_ZN8Derived15func2Eii:250
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# ValueKind = IPVK_VTableTarget:
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2
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# NumValueSites:
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2
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2
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vtable_prof.cc;_ZTVN12_GLOBAL__N_18Derived2E:750
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_ZTV8Derived1:250
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2
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vtable_prof.cc;_ZTVN12_GLOBAL__N_18Derived2E:750
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_ZTV8Derived1:250
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vtable_prof.cc;_ZN12_GLOBAL__N_18Derived25func1Eii
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# Func Hash:
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742261418966908927
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# Num Counters:
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1
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# Counter Values:
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750
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vtable_prof.cc;_ZN12_GLOBAL__N_18Derived25func2Eii
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# Func Hash:
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742261418966908927
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# Num Counters:
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1
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# Counter Values:
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750
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