5223ddd83f
The profile format has now a separate section called "Contexts" - there will be a corresponding one for flat profiles. The root has a separate tag because, in addition to not having a callsite ID as all the other context nodes have under it, it will have additional fields in subsequent patches. The rest of this patch amounts to a bit of refactorings in the reader/writer (for better reuse later) and tests fixups.
102 lines
3.2 KiB
LLVM
102 lines
3.2 KiB
LLVM
; REQUIRES: x86_64-linux
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;
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; RUN: rm -rf %t
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; RUN: split-file %s %t
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; RUN: llvm-ctxprof-util fromYAML --input=%t/profile.yaml --output=%t/profile.ctxprofdata
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; RUN: opt -module-summary -passes='thinlto-pre-link<O2>' -use-ctx-profile=%t/profile.ctxprofdata \
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; RUN: %t/example.ll -S -o %t/prelink.ll
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; RUN: FileCheck --input-file %t/prelink.ll %s --check-prefix=PRELINK
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; RUN: opt -passes='ctx-prof-flatten' -use-ctx-profile=%t/profile.ctxprofdata %t/prelink.ll -S | FileCheck %s
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;
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;
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; Check that instrumentation occurs where expected: the "no" block for both foo and
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; @an_entrypoint - which explains the subsequent branch weights
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;
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; PRELINK-LABEL: @foo
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; PRELINK-LABEL: yes:
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; PRELINK-LABEL: no:
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; PRELINK-NEXT: call void @llvm.instrprof.increment(ptr @foo, i64 [[#]], i32 2, i32 1)
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; PRELINK-LABEL: @an_entrypoint
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; PRELINK-LABEL: yes:
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; PRELINK-NEXT: call void @llvm.instrprof.increment(ptr @an_entrypoint, i64 [[#]], i32 2, i32 1)
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; PRELINK-NOT: "ProfileSummary"
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; Check that the output has:
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; - no instrumentation
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; - the 2 functions have an entry count
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; - each conditional branch has profile annotation
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;
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; CHECK-NOT: call void @llvm.instrprof
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;
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; make sure we have function entry counts, branch weights, and a profile summary.
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; CHECK-LABEL: @foo
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; CHECK-SAME: !prof ![[FOO_EP:[0-9]+]]
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; CHECK: br i1 %t, label %yes, label %no, !prof ![[FOO_BW:[0-9]+]]
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; CHECK-LABEL: @an_entrypoint
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; CHECK-SAME: !prof ![[AN_ENTRYPOINT_EP:[0-9]+]]
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; CHECK: br i1 %t, label %yes, label %common.ret, !prof ![[AN_ENTRYPOINT_BW:[0-9]+]]
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; CHECK: ![[#]] = !{i32 1, !"ProfileSummary", !1}
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; CHECK: ![[#]] = !{!"TotalCount", i64 480}
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; CHECK: ![[#]] = !{!"MaxCount", i64 140}
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; CHECK: ![[#]] = !{!"MaxInternalCount", i64 125}
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; CHECK: ![[#]] = !{!"MaxFunctionCount", i64 140}
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; CHECK: ![[#]] = !{!"NumCounts", i64 6}
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; CHECK: ![[#]] = !{!"NumFunctions", i64 2}
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;
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; @foo will be called both unconditionally and conditionally, on the "yes" branch
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; which has a count of 40. So 140 times.
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; CHECK: ![[FOO_EP]] = !{!"function_entry_count", i64 140}
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; foo's "no" branch is taken 10+5 times (from the 2 contexts belonging to foo).
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; Which means its "yes" branch is taken 140 - 15 times.
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; CHECK: ![[FOO_BW]] = !{!"branch_weights", i32 125, i32 15}
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; CHECK: ![[AN_ENTRYPOINT_EP]] = !{!"function_entry_count", i64 100}
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; CHECK: ![[AN_ENTRYPOINT_BW]] = !{!"branch_weights", i32 40, i32 60}
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;--- profile.yaml
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Contexts:
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- Guid: 4909520559318251808
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Counters: [100, 40]
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Callsites: -
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- Guid: 11872291593386833696
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Counters: [ 100, 5 ]
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-
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- Guid: 11872291593386833696
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Counters: [ 40, 10 ]
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;--- example.ll
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declare void @bar()
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define void @foo(i32 %a, ptr %fct) #0 !guid !0 {
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%t = icmp sgt i32 %a, 7
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br i1 %t, label %yes, label %no
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yes:
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call void %fct(i32 %a)
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br label %exit
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no:
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call void @bar()
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br label %exit
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exit:
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ret void
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}
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define void @an_entrypoint(i32 %a) !guid !1 {
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%t = icmp sgt i32 %a, 0
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call void @foo(i32 10, ptr null)
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br i1 %t, label %yes, label %no
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yes:
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call void @foo(i32 1, ptr null)
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ret void
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no:
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ret void
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}
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attributes #0 = { noinline }
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!0 = !{ i64 11872291593386833696 }
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!1 = !{i64 4909520559318251808}
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