luxufan f079ba76cf [DSE] Eliminate noop store even through has clobbering between LoadI and StoreI ... For noop store of the form of LoadI and StoreI, An invariant should be kept is that the memory state of the related MemoryLoc before LoadI is the same as before StoreI. For this example: ``` define void @pr49927(i32* %q, i32* %p) { %v = load i32, i32* %p, align 4 store i32 %v, i32* %q, align 4 store i32 %v, i32* %p, align 4 ret void } ``` Here the definition of the store's destination is different with the definition of the load's destination, which it seems that the invariant mentioned above is broken. But the definition of the store's destination would write a value that is LoadI, actually, the invariant is still kept. So we can safely ignore it. Fixes https://github.com/llvm/llvm-project/issues/49271 Reviewed By: nikic Differential Revision: https://reviews.llvm.org/D132657		2022-09-29 00:51:56 +00:00
..
X86	…
2011-03-25-DSEMiscompile.ll	…
2011-09-06-EndOfFunction.ll	…
2011-09-06-MemCpy.ll	…
2016-07-17-UseAfterFree.ll	tests: add attributes that would normally come from inferattrs	2022-07-25 17:29:00 -04:00
OverwriteStoreBegin.ll	…
OverwriteStoreEnd.ll	…
PartialStore.ll	…
PartialStore2.ll	…
assume.ll	[CaptureTracking] Ignore ephemeral values in EarliestEscapeInfo	2022-04-08 10:07:26 -07:00
atomic-overlapping.ll	…
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	tests: add attributes that would normally come from inferattrs	2022-07-25 17:29:00 -04:00
captures-before-call.ll	…
captures-before-load.ll	…
combined-partial-overwrites.ll	…
const-pointers.ll	…
crash.ll	…
cs-cs-aliasing.ll	…
debug-counter.ll	…
debuginfo.ll	…
dependent-capture.ll	[DSE] Revisit pointers that may no longer escape after removing another store	2022-07-19 09:30:34 -07:00
dominate.ll	…
fence-todo.ll	…
fence.ll	…
free.ll	tests: add attributes that would normally come from inferattrs	2022-07-25 17:29:00 -04:00
inst-limits.ll	…
int_sideeffect.ll	…
invariant.start.ll	[DSE][MemLoc] Handle intrinsics more generically	2021-12-24 09:29:57 +01:00
launder.invariant.group.ll	…
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	…
loop-invariant-entry-block.ll	…
masked-dead-store-inseltpoison.ll	…
masked-dead-store.ll	[DSE] Add value type info checks for masked store candidates in Dead Store Elimination.	2022-09-20 15:54:25 -07:00
mda-with-dbg-values.ll	…
memcpy-complete-overwrite.ll	…
memcpy-lifetimes.ll	…
memintrinsics.ll	…
memory-intrinsics-sizes.ll	…
memoryssa-scan-limit.ll	…
memset-and-memcpy.ll	…
memset-missing-debugloc.ll	…
memset-unknown-sizes.ll	[DSE] Make test more robust (NFC)	2022-01-11 11:49:52 +01:00
merge-stores-big-endian.ll	…
merge-stores.ll	…
multiblock-captures.ll	…
multiblock-exceptions.ll	…
multiblock-loop-carried-dependence.ll	[DSE] Add extra test for loop invariant store in loop, update comments.	2022-08-29 17:00:00 +01:00
multiblock-loops.ll	…
multiblock-malloc-free.ll	[DSE] Add additional uses to tests to ensure stores be removed.	2022-08-22 10:21:50 +01:00
multiblock-memintrinsics.ll	[DSE] Support looking through memory phis at end of function.	2022-08-30 13:27:51 +01:00
multiblock-memoryphis.ll	…
multiblock-multipath-throwing.ll	…
multiblock-multipath.ll	…
multiblock-overlap.ll	…
multiblock-partial.ll	…
multiblock-simple.ll	…
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	…
noop-stores.ll	[DSE] Eliminate noop store even through has clobbering between LoadI and StoreI	2022-09-29 00:51:56 +00:00
nounwind-invoke.ll	[DSE] Don't remove nounwind invokes	2022-06-21 11:54:09 -07:00
offsetted-overlapping-stores.ll	…
opaque-ptr.ll	…
operand-bundles.ll	tests: add attributes that would normally come from inferattrs	2022-07-25 17:29:00 -04:00
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	…
phi-translation.ll	[DSE] Support looking through memory phis at end of function.	2022-08-30 13:27:51 +01:00
pr11390.ll	…
pr47285-not-overwritten-on-all-exit-paths.ll	…
read-clobber-after-overwrite.ll	…
scoped-noalias.ll	…
simple-preservation.ll	…
simple.ll	[InstCombine] Tighten up known library function signature tests (PR #56463)	2022-08-10 14:15:46 -06:00
stats.ll	…
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] Eliminate noop store even through has clobbering between LoadI and StoreI	2022-09-29 00:51:56 +00:00
tail-byval.ll	…
trivial-dse-calls.ll	[tests] Add coverage of writeonly attribute and operand bundle intersection	2022-01-18 12:08:14 -08:00
wrong-malloc-size.ll	[TLI] Check that malloc argument has type size_t	2022-03-14 17:22:24 +01:00