[clang-tools-extra] [compiler-rt] [llvm] [clang] [IRPGO][ValueProfile] Instrument virtual table address that could be used to do virtual table address comparision for indirect-call-promotion. (PR #66825)

[Mingming Liu via cfe-commits]

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@@ -0,0 +1,117 @@
+To update the inputs used below, run Inputs/update_vtable_value_prof_inputs.sh /path/to/updated/clang++
+
+Show profile data from raw profiles.
+RUN: llvm-profdata show --function=main --ic-targets --show-vtables %p/Inputs/vtable_prof.profraw | FileCheck %s --check-prefix=RAW
+
+Generate indexed profile from raw profile and show the data.
+RUN: llvm-profdata merge %p/Inputs/vtable_prof.profraw -o %t_indexed.profdata
+RUN: llvm-profdata show --function=main --ic-targets --show-vtables %t_indexed.profdata | FileCheck %s --check-prefix=INDEXED
+
+Generate text profile from raw profile and show the data.
+RUN: llvm-profdata merge --text %p/Inputs/vtable_prof.profraw -o %t.proftext
+RUN: llvm-profdata show --function=main --ic-targets --show-vtables --text %t.proftext | FileCheck %s --check-prefix=ICTEXT 
+
+RAW: Counters:
+RAW-NEXT:  main:
+RAW-NEXT:  Hash: 0x0f9a16fe6d398548
+RAW-NEXT:  Counters: 2
+RAW-NEXT:  Indirect Call Site Count: 2
+RAW-NEXT:  Number of instrumented vtables: 2
+RAW-NEXT:  Indirect Target Results:
+RAW-NEXT:	     [  0, _ZN8Derived15func1Eii,        250 ] (25.00%)
+RAW-NEXT:	     [  0, _ZN8Derived25func1Eii,        750 ] (75.00%)
+RAW-NEXT:	     [  1, _ZN8Derived15func2Eii,        250 ] (25.00%)
+RAW-NEXT:	     [  1, _ZN8Derived25func2Eii,        750 ] (75.00%)
+RAW-NEXT:  VTable Results:
+RAW-NEXT:	     [  0, _ZTV8Derived1,        250 ] (25.00%)
+RAW-NEXT:        [  0, _ZTV8Derived2,        750 ] (75.00%)
+RAW-NEXT:        [  1, _ZTV8Derived1,        250 ] (25.00%)
+RAW-NEXT:	     [  1, _ZTV8Derived2,        750 ] (75.00%)
+RAW-NEXT: Instrumentation level: IR  entry_first = 0
+RAW-NEXT: Functions shown: 1
+RAW-NEXT: Total functions: 6
+RAW-NEXT: Maximum function count: 1000
+RAW-NEXT: Maximum internal block count: 250
+RAW-NEXT: Statistics for indirect call sites profile:
+RAW-NEXT:   Total number of sites: 2
+RAW-NEXT:   Total number of sites with values: 2
+RAW-NEXT:   Total number of profiled values: 4
+RAW-NEXT:   Value sites histogram:
+RAW-NEXT:         NumTargets, SiteCount
+RAW-NEXT:         2, 2
+RAW-NEXT: Statistics for vtable profile:
+RAW-NEXT:   Total number of sites: 2
+RAW-NEXT:   Total number of sites with values: 2
+RAW-NEXT:   Total number of profiled values: 4
+RAW-NEXT:   Value sites histogram:
+RAW-NEXT:	      NumTargets, SiteCount
+RAW-NEXT:         2, 2
+
+
+INDEXED:      Counters:
+INDEXED-NEXT:   main:
+INDEXED-NEXT:     Hash: 0x0f9a16fe6d398548
+INDEXED-NEXT:     Counters: 2
+INDEXED-NEXT:     Indirect Call Site Count: 2
+INDEXED-NEXT:     Number of instrumented vtables: 2
+INDEXED-NEXT:     Indirect Target Results:
+INDEXED-NEXT:         [  0, _ZN8Derived25func1Eii,        750 ] (75.00%)
+INDEXED-NEXT:         [  0, _ZN8Derived15func1Eii,        250 ] (25.00%)
+INDEXED-NEXT:         [  1, _ZN8Derived25func2Eii,        750 ] (75.00%)
+INDEXED-NEXT:         [  1, _ZN8Derived15func2Eii,        250 ] (25.00%)
+INDEXED-NEXT:     VTable Results:
+INDEXED-NEXT:	      [  0, _ZTV8Derived2,        750 ] (75.00%)
+INDEXED-NEXT:     	  [  0, _ZTV8Derived1,        250 ] (25.00%)
----------------
minglotus-6 wrote:

The indentation looks fine with latest few commits now. Going to resolve this. 

https://github.com/llvm/llvm-project/pull/66825