[llvm] [memprof] Undrift MemProf profile even when some frames are missing (PR #120500)

[Kazu Hirata via llvm-commits]

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@@ -0,0 +1,97 @@
+;; Tests memprof undrifting when the leaf frame is missing in the profile.
+;; This test case is taken from memprof_missing_leaf.ll with the profile
+;; drifted.
+
+;; Avoid failures on big-endian systems that can't read the profile properly
+; REQUIRES: x86_64-linux
+
+; RUN: split-file %s %t
+; RUN: llvm-profdata merge %t/memprof_missing_leaf.yaml -o %t/memprof_missing_leaf.memprofdata
+; RUN: opt < %t/memprof_missing_leaf.ll -passes='memprof-use<profile-filename=%t/memprof_missing_leaf.memprofdata>' -memprof-salvage-stale-profile -S | FileCheck %s
+
+;--- memprof_missing_leaf.yaml
+---
+HeapProfileRecords:
+  - GUID:            main
+    AllocSites:
+      - Callstack:
+          - { Function: main, LineOffset: 2, Column: 21, IsInlineFrame: false }
+        MemInfoBlock:
+          AllocCount:      1
+          TotalSize:       1
+          TotalLifetime:   0
+          TotalLifetimeAccessDensity: 0
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kazutakahirata wrote:

Removed.

https://github.com/llvm/llvm-project/pull/120500