| ;; Test callsite context graph generation for call graph with two memprof |
| ;; contexts and multiple levels of inlining, requiring generation of new |
| ;; fused nodes to represent the inlined sequence while matching callsite |
| ;; nodes onto the graph. In particular this tests the case where a function |
| ;; has inlined a callee containing an inlined callee. |
| ;; |
| ;; Original code looks like: |
| ;; |
| ;; char *bar() __attribute__((noinline)) { |
| ;; return new char[10]; |
| ;; } |
| ;; |
| ;; char *baz() { |
| ;; return bar(); |
| ;; } |
| ;; |
| ;; char *foo() { |
| ;; return baz(); |
| ;; } |
| ;; |
| ;; int main(int argc, char **argv) { |
| ;; char *x = foo(); |
| ;; char *y = foo(); |
| ;; memset(x, 0, 10); |
| ;; memset(y, 0, 10); |
| ;; delete[] x; |
| ;; sleep(10); |
| ;; 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. |
| ;; |
| ;; Both foo and baz are inlined into main, at both foo callsites. |
| ;; We should update the graph for new fused nodes for both of those inlined |
| ;; callsites to bar. |
| ;; |
| ;; Note that baz and bar are both dead due to the inlining, but have been left |
| ;; in the input IR to ensure that the MIB call chain is matched to the longer |
| ;; inline sequences from main. |
| ;; |
| ;; The IR was then reduced using llvm-reduce with the expected FileCheck input. |
| |
| ; 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,_Z3barv,plx \ |
| ; RUN: -r=%t.o,_Z3bazv,plx \ |
| ; RUN: -r=%t.o,_Z3foov,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: -o %t.out 2>&1 | FileCheck %s --check-prefix=DUMP |
| |
| |
| 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 ptr @_Z3barv() { |
| entry: |
| %call = call ptr @_Znam(i64 0), !memprof !0, !callsite !5 |
| ret ptr null |
| } |
| |
| declare ptr @_Znam(i64) |
| |
| declare ptr @_Z3bazv() |
| |
| declare ptr @_Z3foov() |
| |
| define i32 @main() { |
| delete.end5: |
| %call.i.i = call ptr @_Z3barv(), !callsite !6 |
| %call.i.i8 = call ptr @_Z3barv(), !callsite !7 |
| ret i32 0 |
| } |
| |
| declare void @_ZdaPv() |
| |
| declare i32 @sleep() |
| |
| !0 = !{!1, !3} |
| !1 = !{!2, !"notcold"} |
| !2 = !{i64 9086428284934609951, i64 -5964873800580613432, i64 2732490490862098848, i64 8632435727821051414} |
| !3 = !{!4, !"cold"} |
| !4 = !{i64 9086428284934609951, i64 -5964873800580613432, i64 2732490490862098848, i64 -3421689549917153178} |
| !5 = !{i64 9086428284934609951} |
| !6 = !{i64 -5964873800580613432, i64 2732490490862098848, i64 8632435727821051414} |
| !7 = !{i64 -5964873800580613432, i64 2732490490862098848, i64 -3421689549917153178} |
| |
| |
| ; DUMP: CCG before cloning: |
| ; DUMP: Callsite Context Graph: |
| ; DUMP: Node [[BAR:0x[a-z0-9]+]] |
| ; DUMP: Versions: 1 MIB: |
| ; DUMP: AllocType 1 StackIds: 0, 1, 2 |
| ; DUMP: AllocType 2 StackIds: 0, 1, 3 |
| ; DUMP: (clone 0) |
| ; DUMP: AllocTypes: NotColdCold |
| ; DUMP: ContextIds: 1 2 |
| ; DUMP: CalleeEdges: |
| ; DUMP: CallerEdges: |
| ; DUMP: Edge from Callee [[BAR]] to Caller: [[MAIN1:0x[a-z0-9]+]] AllocTypes: NotCold ContextIds: 1 |
| ; DUMP: Edge from Callee [[BAR]] to Caller: [[MAIN2:0x[a-z0-9]+]] AllocTypes: Cold ContextIds: 2 |
| |
| ;; This is the node synthesized for the first inlined call chain of main->foo->baz |
| ; DUMP: Node [[MAIN1]] |
| ; DUMP: Callee: 17377440600225628772 (_Z3barv) Clones: 0 StackIds: 0, 1, 2 (clone 0) |
| ; DUMP: AllocTypes: NotCold |
| ; DUMP: ContextIds: 1 |
| ; DUMP: CalleeEdges: |
| ; DUMP: Edge from Callee [[BAR]] to Caller: [[MAIN1]] AllocTypes: NotCold ContextIds: 1 |
| ; DUMP: CallerEdges: |
| |
| ;; This is the node synthesized for the second inlined call chain of main->foo->baz |
| ; DUMP: Node [[MAIN2]] |
| ; DUMP: Callee: 17377440600225628772 (_Z3barv) Clones: 0 StackIds: 0, 1, 3 (clone 0) |
| ; DUMP: AllocTypes: Cold |
| ; DUMP: ContextIds: 2 |
| ; DUMP: CalleeEdges: |
| ; DUMP: Edge from Callee [[BAR]] to Caller: [[MAIN2]] AllocTypes: Cold ContextIds: 2 |
| ; DUMP: CallerEdges: |