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[MemProf] Add test for hot hints #124394

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Jan 26, 2025
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[MemProf] Add test for hot hints #124394

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11 changes: 11 additions & 0 deletions llvm/test/Transforms/PGOProfile/memprof.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,14 @@
; RAND2: random hotness seed = 1730170724
; RUN: opt < %s -passes='memprof-use<profile-filename=%t.memprofdatarand2>' -pgo-warn-missing-function -S -stats 2>&1 | FileCheck %s --check-prefixes=MEMPROFRAND2,ALL,MEMPROFONLY,MEMPROFSTATS

;; With the hot access density threshold set to 0, and hot hints enabled,
;; the unconditionally notcold call to new should instead get a hot attribute.
; RUN: opt < %s -passes='memprof-use<profile-filename=%t.memprofdata>' -pgo-warn-missing-function -S -memprof-print-match-info -stats -memprof-min-ave-lifetime-access-density-hot-threshold=0 -memprof-use-hot-hints 2>&1 | FileCheck %s --check-prefixes=MEMPROFHOT,ALL

;; However, with the same threshold, but hot hints not enabled, it should be
;; notcold again.
; RUN: opt < %s -passes='memprof-use<profile-filename=%t.memprofdata>' -pgo-warn-missing-function -S -memprof-min-ave-lifetime-access-density-hot-threshold=0 2>&1 | FileCheck %s --check-prefixes=MEMPROF,ALL

; MEMPROFMATCHINFO: MemProf notcold context with id 1093248920606587996 has total profiled size 10 is matched
; MEMPROFMATCHINFO: MemProf notcold context with id 5725971306423925017 has total profiled size 10 is matched
; MEMPROFMATCHINFO: MemProf notcold context with id 6792096022461663180 has total profiled size 10 is matched
Expand Down Expand Up @@ -192,6 +200,7 @@ entry:
store ptr %argv, ptr %argv.addr, align 8
; MEMPROF: call {{.*}} @_Znam{{.*}} #[[A1:[0-9]+]]
; MEMPROFNOCOLINFO: call {{.*}} @_Znam{{.*}} #[[A1:[0-9]+]]
; MEMPROFHOT: call {{.*}} @_Znam{{.*}} #[[A1:[0-9]+]]
%call = call noalias noundef nonnull ptr @_Znam(i64 noundef 10) #6, !dbg !35
store ptr %call, ptr %a, align 8, !dbg !36
; MEMPROF: call {{.*}} @_Znam{{.*}} #[[A2:[0-9]+]]
Expand Down Expand Up @@ -404,6 +413,8 @@ for.end: ; preds = %for.cond
; MEMPROFNOCOLINFO: ![[C10]] = !{i64 -4535090212904553409}
; MEMPROFNOCOLINFO: ![[C11]] = !{i64 3577763375057267810}

; MEMPROFHOT: #[[A1]] = { builtin allocsize(0) "memprof"="hot" }

;; For the specific random seed, this is the expected order of hotness
; MEMPROFRAND2: !"cold"
; MEMPROFRAND2: !"cold"
Expand Down
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