267 lines
9.7 KiB
LLVM
267 lines
9.7 KiB
LLVM
;; Test callsite context graph generation for call graph with with MIBs
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;; that have pruned contexts that partially match multiple inlined
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;; callsite contexts, requiring duplication of context ids and nodes
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;; while matching callsite nodes onto the graph. Also tests graph and IR
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;; cloning.
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;;
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;; Original code looks like:
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;;
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;; char *D() {
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;; return new char[10];
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;; }
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;;
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;; char *F() {
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;; return D();
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;; }
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;;
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;; char *C() {
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;; return D();
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;; }
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;;
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;; char *B() {
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;; return C();
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;; }
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;;
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;; char *E() {
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;; return C();
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;; }
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;; int main(int argc, char **argv) {
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;; char *x = B(); // cold
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;; char *y = E(); // cold
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;; char *z = F(); // default
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;; memset(x, 0, 10);
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;; memset(y, 0, 10);
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;; memset(z, 0, 10);
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;; delete[] z;
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;; sleep(10);
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;; delete[] x;
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;; delete[] y;
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;; return 0;
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;; }
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;;
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;; Code compiled with -mllvm -memprof-ave-lifetime-cold-threshold=5 so that the
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;; memory freed after sleep(10) results in cold lifetimes.
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;;
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;; The code below was created by forcing inlining of C into both B and E.
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;; Since both allocation contexts via C are cold, the matched memprof
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;; metadata has the context pruned above C's callsite. This requires
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;; matching the stack node for C to callsites where it was inlined (i.e.
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;; the callsites in B and E that have callsite metadata that includes C's).
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;; It also requires duplication of that node in the graph as well as the
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;; duplication of the context ids along that path through the graph,
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;; so that we can represent the duplicated (via inlining) C callsite.
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;;
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;; The IR was then reduced using llvm-reduce with the expected FileCheck input.
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;; -stats requires asserts
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; REQUIRES: asserts
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; RUN: opt -thinlto-bc %s >%t.o
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; RUN: llvm-lto2 run %t.o -enable-memprof-context-disambiguation \
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; RUN: -supports-hot-cold-new \
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; RUN: -r=%t.o,main,plx \
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; RUN: -r=%t.o,_ZdaPv, \
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; RUN: -r=%t.o,sleep, \
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; RUN: -r=%t.o,_Znam, \
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; RUN: -memprof-verify-ccg -memprof-verify-nodes -memprof-dump-ccg \
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; RUN: -stats -pass-remarks=memprof-context-disambiguation -save-temps \
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; RUN: -o %t.out 2>&1 | FileCheck %s --check-prefix=DUMP \
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; RUN: --check-prefix=STATS --check-prefix=STATS-BE --check-prefix=REMARKS
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; RUN: llvm-dis %t.out.1.4.opt.bc -o - | FileCheck %s --check-prefix=IR
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;; Try again but with distributed ThinLTO
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; RUN: llvm-lto2 run %t.o -enable-memprof-context-disambiguation \
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; RUN: -supports-hot-cold-new \
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; RUN: -thinlto-distributed-indexes \
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; RUN: -r=%t.o,main,plx \
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; RUN: -r=%t.o,_ZdaPv, \
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; RUN: -r=%t.o,sleep, \
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; RUN: -r=%t.o,_Znam, \
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; RUN: -memprof-verify-ccg -memprof-verify-nodes -memprof-dump-ccg \
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; RUN: -stats -pass-remarks=memprof-context-disambiguation \
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; RUN: -o %t2.out 2>&1 | FileCheck %s --check-prefix=DUMP \
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; RUN: --check-prefix=STATS
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;; Check distributed index
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; RUN: llvm-dis %t.o.thinlto.bc -o - | FileCheck %s --check-prefix=DISTRIB
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;; Run ThinLTO backend
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; RUN: opt -passes=memprof-context-disambiguation \
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; RUN: -memprof-import-summary=%t.o.thinlto.bc \
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; RUN: -stats -pass-remarks=memprof-context-disambiguation \
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; RUN: %t.o -S 2>&1 | FileCheck %s --check-prefix=IR \
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; RUN: --check-prefix=STATS-BE --check-prefix=REMARKS
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source_filename = "duplicate-context-ids.ll"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define internal ptr @_Z1Dv() #0 {
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entry:
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%call = call ptr @_Znam(i64 0), !memprof !0, !callsite !5
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ret ptr null
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}
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declare ptr @_Znam(i64)
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define internal ptr @_Z1Fv() #0 {
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entry:
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%call = call ptr @_Z1Dv(), !callsite !6
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ret ptr null
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}
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define internal ptr @_Z1Cv() #0 {
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entry:
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%call = call ptr @_Z1Dv(), !callsite !7
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ret ptr null
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}
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define internal ptr @_Z1Bv() #0 {
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entry:
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%call.i = call ptr @_Z1Dv(), !callsite !8
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ret ptr null
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}
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define internal ptr @_Z1Ev() #0 {
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entry:
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%call.i = call ptr @_Z1Dv(), !callsite !9
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ret ptr null
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}
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define i32 @main() #0 {
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entry:
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call ptr @_Z1Bv()
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call ptr @_Z1Ev()
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call ptr @_Z1Fv()
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ret i32 0
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}
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declare void @_ZdaPv()
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declare i32 @sleep()
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attributes #0 = { noinline optnone}
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!0 = !{!1, !3}
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!1 = !{!2, !"cold"}
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!2 = !{i64 6541423618768552252, i64 -6270142974039008131}
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!3 = !{!4, !"notcold"}
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!4 = !{i64 6541423618768552252, i64 -4903163940066524832}
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!5 = !{i64 6541423618768552252}
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!6 = !{i64 -4903163940066524832}
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!7 = !{i64 -6270142974039008131}
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!8 = !{i64 -6270142974039008131, i64 -184525619819294889}
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!9 = !{i64 -6270142974039008131, i64 1905834578520680781}
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;; After adding only the alloc node memprof metadata, we only have 2 contexts.
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; DUMP: CCG before updating call stack chains:
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; DUMP: Callsite Context Graph:
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; DUMP: Node [[D:0x[a-z0-9]+]]
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; DUMP: Versions: 1 MIB:
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; DUMP: AllocType 2 StackIds: 0
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; DUMP: AllocType 1 StackIds: 1
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; DUMP: (clone 0)
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; DUMP: AllocTypes: NotColdCold
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; DUMP: ContextIds: 1 2
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; DUMP: CalleeEdges:
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; DUMP: CallerEdges:
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; DUMP: Edge from Callee [[D]] to Caller: [[C:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 1
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; DUMP: Edge from Callee [[D]] to Caller: [[F:0x[a-z0-9]+]] AllocTypes: NotCold ContextIds: 2
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;; After updating for callsite metadata, we should have generated context ids 3 and 4,
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;; along with 2 new nodes for those callsites. All have the same allocation type
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;; behavior as the original C node.
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; DUMP: CCG before cloning:
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; DUMP: Callsite Context Graph:
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; DUMP: Node [[D]]
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; DUMP: Versions: 1 MIB:
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; DUMP: AllocType 2 StackIds: 0
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; DUMP: AllocType 1 StackIds: 1
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; DUMP: (clone 0)
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; DUMP: AllocTypes: NotColdCold
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; DUMP: ContextIds: 1 2 3 4
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; DUMP: CalleeEdges:
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; DUMP: CallerEdges:
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; DUMP: Edge from Callee [[D]] to Caller: [[F]] AllocTypes: NotCold ContextIds: 2
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; DUMP: Edge from Callee [[D]] to Caller: [[C1:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 3
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; DUMP: Edge from Callee [[D]] to Caller: [[C2:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 4
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; DUMP: Edge from Callee [[D]] to Caller: [[C0:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 1
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; DUMP: CCG after cloning:
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; DUMP: Callsite Context Graph:
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; DUMP: Node [[D]]
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; DUMP: Versions: 1 MIB:
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; DUMP: AllocType 2 StackIds: 0
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; DUMP: AllocType 1 StackIds: 1
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; DUMP: (clone 0)
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; DUMP: AllocTypes: NotCold
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; DUMP: ContextIds: 2
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; DUMP: CalleeEdges:
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; DUMP: CallerEdges:
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; DUMP: Edge from Callee [[D]] to Caller: [[F]] AllocTypes: NotCold ContextIds: 2
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; DUMP: Clones: [[D2:0x[a-z0-9]+]]
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; DUMP: Node [[D2]]
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; DUMP: Versions: 1 MIB:
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; DUMP: AllocType 2 StackIds: 0
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; DUMP: AllocType 1 StackIds: 1
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; DUMP: (clone 0)
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; DUMP: AllocTypes: Cold
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; DUMP: ContextIds: 1 3 4
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; DUMP: CalleeEdges:
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; DUMP: CallerEdges:
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; DUMP: Edge from Callee [[D2]] to Caller: [[C0]] AllocTypes: Cold ContextIds: 1
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; DUMP: Edge from Callee [[D2]] to Caller: [[C1]] AllocTypes: Cold ContextIds: 3
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; DUMP: Edge from Callee [[D2]] to Caller: [[C2]] AllocTypes: Cold ContextIds: 4
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; DUMP: Clone of [[D]]
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; REMARKS: created clone _Z1Dv.memprof.1
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; REMARKS: call in clone _Z1Dv marked with memprof allocation attribute notcold
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; REMARKS: call in clone _Z1Dv.memprof.1 marked with memprof allocation attribute cold
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; REMARKS: call in clone _Z1Bv assigned to call function clone _Z1Dv.memprof.1
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; REMARKS: call in clone _Z1Ev assigned to call function clone _Z1Dv.memprof.1
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;; The allocation via F does not allocate cold memory. It should call the
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;; original D, which ultimately call the original allocation decorated
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;; with a "notcold" attribute.
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; IR: define internal {{.*}} @_Z1Dv()
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; IR: call {{.*}} @_Znam(i64 0) #[[NOTCOLD:[0-9]+]]
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; IR: define internal {{.*}} @_Z1Fv()
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; IR: call {{.*}} @_Z1Dv()
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;; The allocations via B and E allocate cold memory. They should call the
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;; cloned D, which ultimately call the cloned allocation decorated with a
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;; "cold" attribute.
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; IR: define internal {{.*}} @_Z1Bv()
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; IR: call {{.*}} @_Z1Dv.memprof.1()
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; IR: define internal {{.*}} @_Z1Ev()
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; IR: call {{.*}} @_Z1Dv.memprof.1()
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; IR: define internal {{.*}} @_Z1Dv.memprof.1()
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; IR: call {{.*}} @_Znam(i64 0) #[[COLD:[0-9]+]]
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; IR: attributes #[[NOTCOLD]] = { "memprof"="notcold" }
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; IR: attributes #[[COLD]] = { "memprof"="cold" }
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; STATS: 1 memprof-context-disambiguation - Number of cold static allocations (possibly cloned)
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; STATS-BE: 1 memprof-context-disambiguation - Number of cold static allocations (possibly cloned) during ThinLTO backend
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; STATS: 1 memprof-context-disambiguation - Number of not cold static allocations (possibly cloned)
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; STATS-BE: 1 memprof-context-disambiguation - Number of not cold static allocations (possibly cloned) during ThinLTO backend
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; STATS-BE: 2 memprof-context-disambiguation - Number of allocation versions (including clones) during ThinLTO backend
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; STATS: 1 memprof-context-disambiguation - Number of function clones created during whole program analysis
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; STATS-BE: 1 memprof-context-disambiguation - Number of function clones created during ThinLTO backend
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; STATS-BE: 1 memprof-context-disambiguation - Number of functions that had clones created during ThinLTO backend
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; STATS-BE: 2 memprof-context-disambiguation - Maximum number of allocation versions created for an original allocation during ThinLTO backend
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; STATS-BE: 1 memprof-context-disambiguation - Number of original (not cloned) allocations with memprof profiles during ThinLTO backend
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; DISTRIB: ^[[E:[0-9]+]] = gv: (guid: 331966645857188136, {{.*}} callsites: ((callee: ^[[D:[0-9]+]], clones: (1)
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; DISTRIB: ^[[D]] = gv: (guid: 11079124245221721799, {{.*}} allocs: ((versions: (notcold, cold)
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; DISTRIB: ^[[F:[0-9]+]] = gv: (guid: 11254287701717398916, {{.*}} callsites: ((callee: ^[[D]], clones: (0)
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; DISTRIB: ^[[B:[0-9]+]] = gv: (guid: 13579056193435805313, {{.*}} callsites: ((callee: ^[[D]], clones: (1)
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; DISTRIB: ^[[C:[0-9]+]] = gv: (guid: 15101436305866936160, {{.*}} callsites: ((callee: ^[[D:[0-9]+]], clones: (1)
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