llvm-project

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[DSE] Fall back to CFG scan for unreachable terminators.

Blocks with UnreachableInst terminators are considered as root nodes in
the PDT. This pessimize DSE, if there are no aliasing reads from the
potentially dead store and the block with the unreachable terminator.

If any of the root nodes of the PDF has UnreachableInst as terminator,
fall back to the CFG scan, even the common dominator of all killing
blocks does not post-dominate the block with potentially dead store.

It looks like the compile-time impact for the extra scans is negligible.
https://llvm-compile-time-tracker.com/compare.php?from=779bbbf27fe631154bdfaac7a443f198d4654688&to=ac59945f1bec1c6a7d7f5590c8c69fd9c5369c53&stat=instructions

Fixes #53800.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D119760

2022-02-16 14:06:40 +00:00

X86

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

2011-03-25-DSEMiscompile.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

2011-09-06-EndOfFunction.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

2011-09-06-MemCpy.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

2016-07-17-UseAfterFree.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

atomic-overlapping.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

atomic-todo.ll

[NFC][llvm] Inclusive language: reword uses of sanity test and check

2021-11-25 07:21:42 -05:00

atomic.ll

[NFC][llvm] Inclusive language: reword uses of sanity test and check

2021-11-25 07:21:42 -05:00

calloc-store.ll

[DSE] Handle inaccessiblememonly calloc

2022-01-19 12:55:09 +01:00

captures-before-call.ll

[AA] Move earliest escape tracking from DSE to AA

2021-09-25 22:40:41 +02:00

captures-before-load.ll

[AA] Move earliest escape tracking from DSE to AA

2021-09-25 22:40:41 +02:00

combined-partial-overwrites.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

const-pointers.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

crash.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

cs-cs-aliasing.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

debug-counter.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

debuginfo.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

dominate.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

fence-todo.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

fence.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

free.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

inst-limits.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

int_sideeffect.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

invariant.start.ll

[DSE][MemLoc] Handle intrinsics more generically

2021-12-24 09:29:57 +01:00

launder.invariant.group.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

libcalls-darwin.ll

[BuildLibCalls] Add nounwind,willreturn to memset_pattern{4,8,16}.

2022-01-12 10:32:53 +00:00

libcalls.ll

[DSE] Add additional memset_chk tests.

2021-12-06 13:06:11 +00:00

lifetime.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

loop-invariant-entry-block.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

masked-dead-store-inseltpoison.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

masked-dead-store.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

mda-with-dbg-values.ll

Revert "[NFC] remove explicit default value for strboolattr attribute in tests"

2021-05-24 19:43:40 +02:00

memcpy-complete-overwrite.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

memcpy-lifetimes.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

memintrinsics.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

memory-intrinsics-sizes.ll

[DSE] Handle memmove with equal non-const sizes

2021-03-10 17:52:00 +01:00

memoryssa-scan-limit.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

memset-and-memcpy.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

memset-missing-debugloc.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

memset-unknown-sizes.ll

[DSE] Make test more robust (NFC)

2022-01-11 11:49:52 +01:00

merge-stores-big-endian.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

merge-stores.ll

[Tests] Fix incorrect noalias metadata

2021-09-18 20:51:00 +02:00

multiblock-captures.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-exceptions.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-loop-carried-dependence.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-loops.ll

[DSE] Remove stores in the same loop iteration

2021-06-20 17:03:30 +01:00

multiblock-malloc-free.ll

[IR] Memory intrinsics are not unconditionally nosync

2021-05-21 03:40:59 +02:00

multiblock-memintrinsics.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-memoryphis.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-multipath-throwing.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-multipath.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-overlap.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-partial.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-simple.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

multiblock-throwing.ll

[DSE] Add test cases with more complex redundant stores.

2021-10-22 13:50:32 +01:00

multiblock-unreachable.ll

[DSE] Fall back to CFG scan for unreachable terminators.

2022-02-16 14:06:40 +00:00

no-targetdata.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

noop-stores.ll

[DSE] Handle inaccessiblememonly calloc

2022-01-19 12:55:09 +01:00

offsetted-overlapping-stores.ll

[DSE] Extending isOverwrite to support offsetted fully overlapping stores

2021-03-10 21:09:33 +01:00

opaque-ptr.ll

[OpaquePtr] Forbid mixing typed and opaque pointers

2021-09-10 15:18:23 +02:00

operand-bundles.ll

[DSE] Handle inaccessiblememonly calloc

2022-01-19 12:55:09 +01:00

out-of-bounds-stores.ll

[DSE] Add test case with multiple inbounds stores, followed by OOB.

2021-11-12 09:40:03 +00:00

overlap.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

OverwriteStoreBegin.ll

[OpaquePtr] Forbid mixing typed and opaque pointers

2021-09-10 15:18:23 +02:00

OverwriteStoreEnd.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

PartialStore2.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

PartialStore.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

phi-translation.ll

[DSE] Add tests that require phi translation to be removed.

2021-03-10 16:32:55 +00:00

pr11390.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

pr47285-not-overwritten-on-all-exit-paths.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

read-clobber-after-overwrite.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

scoped-noalias.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

simple-preservation.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

simple.ll

[DSE] Add test with sret argument (NFC)

2022-01-26 14:25:31 +01:00

stats.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

store-after-loop.ll

[DSE] Fix invalid removal of store instruction

2021-12-22 16:11:23 -05:00

stores-of-existing-values.ll

[DSE] Fix typo in recent commit

2021-12-24 11:25:25 +01:00

tail-byval.ll

[DSE] Remove MemDep-based implementation

2021-03-07 18:17:31 +01:00

trivial-dse-calls.ll

[tests] Add coverage of writeonly attribute and operand bundle intersection

2022-01-18 12:08:14 -08:00