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Merge commit eb8f379567e8 from llvm-project (by Florian Hahn):

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[DSE] Remove malloc from EarliestEscapeInfo before removing. (#84157)

  Not removing the malloc from earliest escape info leaves stale entries
  in the cache.

  Fixes https://github.com/llvm/llvm-project/issues/84051.

  PR: https://github.com/llvm/llvm-project/pull/84157

This fixes a crash in clang (usually a bus error, but can also be
another memory error) when compiling the science/siconos port.

PR:		278174
Reported by:	yuri
MFC after:	3 days

(cherry picked from commit aaabed1dea)
This commit is contained in:
Dimitry Andric 2024-04-05 15:00:12 +02:00
parent 2bfda18ff7
commit 928ea8066d
1 changed files with 2 additions and 2 deletions
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4
contrib/llvm-project/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
View file

@ -1893,6 +1893,7 @@ struct DSEState {
Malloc->getArgOperand(0), IRB, TLI);
if (!Calloc)
return false;
MemorySSAUpdater Updater(&MSSA);
auto *LastDef =
cast<MemoryDef>(Updater.getMemorySSA()->getMemoryAccess(Malloc));
@ -1901,9 +1902,8 @@ struct DSEState {
LastDef);
auto *NewAccessMD = cast<MemoryDef>(NewAccess);
Updater.insertDef(NewAccessMD, /*RenameUses=*/true);
Updater.removeMemoryAccess(Malloc);
Malloc->replaceAllUsesWith(Calloc);
Malloc->eraseFromParent();
deleteDeadInstruction(Malloc);
return true;
}