135 lines
4.7 KiB
LLVM
135 lines
4.7 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 -passes=memprof-context-disambiguation -supports-hot-cold-new \
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; RUN: -memprof-verify-ccg -memprof-verify-nodes -memprof-dump-ccg \
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; RUN: %s -S 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() #0 {
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entry:
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%call = call noalias noundef nonnull dereferenceable(10) ptr @_Znam(i64 noundef 10) #7, !memprof !7, !callsite !12, !heapallocsite !13
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ret ptr null
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}
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; Function Attrs: nobuiltin
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declare ptr @_Znam(i64) #1
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; Function Attrs: mustprogress
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declare ptr @_Z3bazv() #2
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define i32 @main() #3 {
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delete.end5:
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%call.i.i = call noundef ptr @_Z3barv(), !callsite !14
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%call.i.i8 = call noundef ptr @_Z3barv(), !callsite !15
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ret i32 0
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}
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; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4
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declare void @_ZdaPv() #5
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declare i32 @sleep() #6
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attributes #0 = { "stack-protector-buffer-size"="8" }
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attributes #1 = { nobuiltin }
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attributes #2 = { mustprogress }
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attributes #3 = { "tune-cpu"="generic" }
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attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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attributes #5 = { "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" }
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attributes #6 = { "disable-tail-calls"="true" }
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attributes #7 = { builtin }
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!llvm.module.flags = !{!0, !1, !2, !3, !4, !5, !6}
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!0 = !{i32 7, !"Dwarf Version", i32 5}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = !{i32 1, !"wchar_size", i32 4}
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!3 = !{i32 8, !"PIC Level", i32 2}
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!4 = !{i32 7, !"PIE Level", i32 2}
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!5 = !{i32 7, !"uwtable", i32 2}
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!6 = !{i32 7, !"frame-pointer", i32 2}
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!7 = !{!8, !10}
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!8 = !{!9, !"notcold"}
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!9 = !{i64 9086428284934609951, i64 -5964873800580613432, i64 2732490490862098848, i64 8632435727821051414}
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!10 = !{!11, !"cold"}
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!11 = !{i64 9086428284934609951, i64 -5964873800580613432, i64 2732490490862098848, i64 -3421689549917153178}
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!12 = !{i64 9086428284934609951}
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!13 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!14 = !{i64 -5964873800580613432, i64 2732490490862098848, i64 8632435727821051414}
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!15 = !{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: %call = call noalias noundef nonnull dereferenceable(10) ptr @_Znam(i64 noundef 10) #7, !heapallocsite !7 (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: %call.i.i = call noundef ptr @_Z3barv() (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: %call.i.i8 = call noundef ptr @_Z3barv() (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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