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