derek.holloway
7502bf64a4
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59 lines
1.5 KiB
LLVM
59 lines
1.5 KiB
LLVM
; Check that flattened profile lowering handles cold subgraphs that end in "unreachable"
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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 -passes=ctx-prof-flatten %t/1234.ll -use-ctx-profile=%t/profile.ctxprofdata -S -o - | FileCheck %s
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; CHECK-LABEL: entry:
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; CHECK: br i1 %t, label %yes, label %no, !prof ![[C1:[0-9]+]]
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; CHECK-LABEL: no:
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; CHECK-NOT: !prof
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; CHECK-LABEL: no1:
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; CHECK-NOT: !prof
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; CHECK-LABEL: no2:
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; CHECK-NOT: !prof
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; CHECK-LABEL: yes:
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; CHECK: br i1 %t3, label %yes1, label %yes2, !prof ![[C1]]
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; CHECK-NOT: !prof
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; CHECK: ![[C1]] = !{!"branch_weights", i32 72, i32 0}
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;--- 1234.ll
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define void @f1(i32 %cond) !guid !0 {
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entry:
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call void @llvm.instrprof.increment(ptr @f1, i64 42, i32 42, i32 0)
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%t = icmp eq i32 %cond, 1
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br i1 %t, label %yes, label %no
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no:
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%t2 = icmp eq i32 %cond, 2
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br i1 %t2, label %no1, label %no2
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no1:
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unreachable
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no2:
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call void @llvm.instrprof.increment(ptr @f1, i64 42, i32 42, i32 1)
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unreachable
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yes:
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%t3 = icmp eq i32 %cond, 3
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br i1 %t3, label %yes1, label %yes2
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yes1:
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br label %exit
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yes2:
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call void @llvm.instrprof.increment(ptr @f1, i64 42, i32 42, i32 2)
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%t4 = icmp eq i32 %cond, 4
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br i1 %t4, label %yes3, label %yes4
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yes3:
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br label %exit
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yes4:
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call void @llvm.instrprof.increment(ptr @f1, i64 42, i32 42, i32 3)
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unreachable
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exit:
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ret void
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}
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!0 = !{i64 1234}
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;--- profile.yaml
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Contexts:
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- Guid: 1234
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TotalRootEntryCount: 12
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Counters: [6,0,0,0]
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