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97 lines
4.6 KiB
LLVM
97 lines
4.6 KiB
LLVM
;; Check that the values of -icp-max-num-vtables, -icp-max-prom, and
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;; -module-summary-max-indirect-edges affect the number of profiled
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;; vtables and virtual functions propagated from the VP metadata to
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;; the ThinLTO summary as expected.
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;; First try with a max of 1 for both vtables and virtual functions.
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; RUN: opt -module-summary -icp-max-num-vtables=1 -icp-max-prom=1 %s -o %t.o
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; RUN: llvm-bcanalyzer -dump %t.o | FileCheck %s --check-prefix=SUMMARY
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; RUN: llvm-dis -o - %t.o | FileCheck %s --check-prefix=DIS
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;; Round trip it through llvm-as
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; RUN: llvm-dis -o - %t.o | llvm-as -o - | llvm-dis -o - | FileCheck %s --check-prefix=DIS
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;; Next check that a larger -module-summary-max-indirect-edges value overrides
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;; -icp-max-prom when determining how many virtual functions to summarize.
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; RUN: opt -module-summary -icp-max-num-vtables=1 -icp-max-prom=1 -module-summary-max-indirect-edges=2 %s -o %t2.o
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; RUN: llvm-bcanalyzer -dump %t2.o | FileCheck %s --check-prefixes=SUMMARY,SUMMARY2
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; RUN: llvm-dis -o - %t2.o | FileCheck %s --check-prefixes=DIS,DIS2
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; SUMMARY: <GLOBALVAL_SUMMARY_BLOCK
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; SUMMARY-NEXT: <VERSION op0=
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; SUMMARY-NEXT: <FLAGS op0=0/>
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;; The `VALUE_GUID` below represents the "_ZTV4Base" referenced by the instruction
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;; that loads vtable pointers.
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; SUMMARY-NEXT: <VALUE_GUID {{.*}} op0=[[VTABLEBASE:[0-9]+]] op1=456547254 op2=3929380924/>
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;; The `VALUE_GUID` below represents the "_ZN4Base4funcEv" referenced by the
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;; indirect call instruction.
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; SUMMARY-NEXT: <VALUE_GUID {{.*}} op0=[[VFUNCBASE:[0-9]+]] op1=1271117309 op2=2009351347/>
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;; The `VALUE_GUID` below represents the "_ZN7Derived4funcEv" referenced by the
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;; indirect call instruction.
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; SUMMARY2-NEXT: <VALUE_GUID {{.*}} op0=[[VFUNCDER:[0-9]+]] op1=1437699922 op2=4037658799/>
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;; <PERMODULE_PROFILE> has the format [valueid, flags, instcount, funcflags,
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;; numrefs, rorefcnt, worefcnt,
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;; m x valueid,
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;; n x (valueid, hotness+tailcall)]
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;; NOTE vtables and functions from Derived class are dropped in the base case
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;; because `-icp-max-num-vtables` and `-icp-max-prom` are both set to one.
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; SUMMARY-NEXT: <PERMODULE_PROFILE {{.*}} op0=0 op1=0 op2=4 op3=256 op4=1 op5=1 op6=0 op7=[[VTABLEBASE]] op8=[[VFUNCBASE]] op9=3
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;; With -module-summary-max-indirect-edges=2 we do get the Derived class
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;; function in the summary.
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; SUMMARY2-SAME: op10=[[VFUNCDER]] op11=2
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;; We should have no other ops before the end of the summary record.
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; SUMMARY-NOT: op
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; SUMMARY-SAME: />
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; SUMMARY-NEXT: </GLOBALVAL_SUMMARY_BLOCK>
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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;; Function has one BB and an entry count of 150, so the BB is hot according to
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;; ProfileSummary and reflected so in the bitcode (see llvm-dis output).
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define i32 @_Z4testP4Base(ptr %0) !prof !15 {
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%2 = load ptr, ptr %0, !prof !16
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%3 = load ptr, ptr %2
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%4 = tail call i32 %3(ptr %0), !prof !17
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ret i32 %4
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}
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!llvm.module.flags = !{!1}
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!1 = !{i32 1, !"ProfileSummary", !2}
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!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
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!3 = !{!"ProfileFormat", !"InstrProf"}
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!4 = !{!"TotalCount", i64 10000}
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!5 = !{!"MaxCount", i64 200}
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!6 = !{!"MaxInternalCount", i64 200}
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!7 = !{!"MaxFunctionCount", i64 200}
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!8 = !{!"NumCounts", i64 3}
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!9 = !{!"NumFunctions", i64 3}
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!10 = !{!"DetailedSummary", !11}
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!11 = !{!12, !13, !14}
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!12 = !{i32 10000, i64 100, i32 1}
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!13 = !{i32 990000, i64 100, i32 1}
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!14 = !{i32 999999, i64 1, i32 2}
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!15 = !{!"function_entry_count", i32 150}
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;; 1960855528937986108 is the MD5 hash of _ZTV4Base, and
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;; 13870436605473471591 is the MD5 hash of _ZTV7Derived
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!16 = !{!"VP", i32 2, i64 150, i64 1960855528937986108, i64 100, i64 13870436605473471591, i64 50}
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;; 5459407273543877811 is the MD5 hash of _ZN4Base4funcEv, and
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;; 6174874150489409711 is the MD5 hash of _ZN7Derived4funcEv
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!17 = !{!"VP", i32 0, i64 150, i64 5459407273543877811, i64 100, i64 6174874150489409711, i64 50}
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;; ModuleSummaryIndex stores <guid, global-value summary> map in std::map; so
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;; global value summaries are printed out in the order that gv's guid increases.
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; DIS: ^[[VTABLEBASE2:[0-9]+]] = gv: (guid: 1960855528937986108)
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; DIS: ^[[VFUNCBASE2:[0-9]+]] = gv: (guid: 5459407273543877811)
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; DIS2: ^[[VFUNCDER2:[0-9]+]] = gv: (guid: 6174874150489409711)
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; DIS: gv: (name: "_Z4testP4Base", {{.*}} calls: ((callee: ^[[VFUNCBASE2]], hotness: hot)
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;; With -module-summary-max-indirect-edges=2 we get the Derived func.
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; DIS2-SAME: (callee: ^[[VFUNCDER2]], hotness: none)
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; DIS-NOT: callee
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; DIS-SAME: ), refs: (readonly ^[[VTABLEBASE2]])
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