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