[all-commits] [llvm/llvm-project] aa440b: [NFCI][ValueTracking] getUnderlyingObject(): grace...
Roman Lebedev via All-commits
all-commits at lists.llvm.org
Mon Mar 15 03:51:34 PDT 2021
Branch: refs/heads/main
Home: https://github.com/llvm/llvm-project
Commit: aa440ba24dc25e4c95f6dcf8ff647024f3b12661
https://github.com/llvm/llvm-project/commit/aa440ba24dc25e4c95f6dcf8ff647024f3b12661
Author: Roman Lebedev <lebedev.ri at gmail.com>
Date: 2021-03-15 (Mon, 15 Mar 2021)
Changed paths:
M llvm/lib/Analysis/ValueTracking.cpp
Log Message:
-----------
[NFCI][ValueTracking] getUnderlyingObject(): gracefully handle cycles
Normally, this function just doesn't bother about cycles,
and hopes that the caller supplied small-enough depth
so that at worst it will take a potentially large,
but limited amount of time. But that obviously doesn't work
if there is no depth limit.
This reapples 36f1c3db66f7268ea3183bcf0bbf05b3e1c570b4,
but without asserting, just bailout once cycle is detected.
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