[test][MemDep] Correct the 'NOT' checks in the invalidation.ll test case. NFC

[bjope]

Summary

The MemoryDependenceAnalysis/invalidation.ll test case was using

; CHECK-NOT-AA-INVALIDATE:

but I think the intention was to use

; CHECK-AA-INVALIDATE-NOT:

Simply changing the checks like that would make the test fail.

The old statement that AA being stateless would result in nothing
to invalidate when doing invalidate<aa> is not true afaict.
It would be different if for example doing invalidate<basic-aa>, then
the AAManager isn't invalidated (and then neither memdep would be
invalidated). But when the AAManager itself is invalidated then we
should expect to find both "Invalidating analysis: AAManager" and
"Invalidating analysis: MemoryDependenceAnalysis" in the output.

[nikic]

LG

llvm/test/Analysis/MemoryDependenceAnalysis/invalidation.ll

 ; Test that memdep gets invalidated when the analyses it depends on are
 ; invalidated.
 ;
-; Check AA. AA is stateless, there's nothing to invalidate.
+; Check AA. AA is stateless, but given an explicit invalidate (abandon) the
+; AAManager is invalidated and we must invalidate memdep as well given
+; the transitive dependency.
 ; RUN: opt -disable-output -debug-pass-manager -aa-pipeline='basic-aa' %s 2>&1 \
 ; RUN:     -passes='require<memdep>,invalidate<aa>,gvn' \
 ; RUN:     | FileCheck %s --check-prefix=CHECK-AA-INVALIDATE
 ; CHECK-AA-INVALIDATE: Running pass: RequireAnalysisPass
 ; CHECK-AA-INVALIDATE: Running analysis: MemoryDependenceAnalysis
 ; CHECK-AA-INVALIDATE: Running pass: InvalidateAnalysisPass
-; CHECK-NOT-AA-INVALIDATE: Invalidating analysis: MemoryDependenceAnalysis
-; CHECK-AA-INVALIDATE: Running pass: GVN
-; CHECK-NOT-AA-INVALIDATE: Running analysis: MemoryDependenceAnalysis
+; CHECK-AA-INVALIDATE: Invalidating analysis: AAManager
+; CHECK-AA-INVALIDATE: Invalidating analysis: MemoryDependenceAnalysis
+; CHECK-AA-INVALIDATE: Running pass: GVNPass
+; CHECK-AA-INVALIDATE: Running analysis: MemoryDependenceAnalysis
 ;
 ; Check domtree specifically.
 ; RUN: opt -disable-output -debug-pass-manager %s 2>&1 \
 ; RUN:     -passes='require<memdep>,invalidate<domtree>,gvn' \
 ; RUN:     | FileCheck %s --check-prefix=CHECK-DT-INVALIDATE
 ; CHECK-DT-INVALIDATE: Running pass: RequireAnalysisPass
 ; CHECK-DT-INVALIDATE: Running analysis: MemoryDependenceAnalysis
 ; CHECK-DT-INVALIDATE: Running pass: InvalidateAnalysisPass
 ; CHECK-DT-INVALIDATE: Invalidating analysis: DominatorTreeAnalysis
 ; CHECK-DT-INVALIDATE: Invalidating analysis: MemoryDependenceAnalysis
-; CHECK-DT-INVALIDATE: Running pass: GVN
+; CHECK-DT-INVALIDATE: Running pass: GVNPass
 ; CHECK-DT-INVALIDATE: Running analysis: MemoryDependenceAnalysis
 ;
 
 define void @test_use_domtree(ptr nocapture %bufUInt, ptr nocapture %pattern) nounwind {
 entry:
   br label %for.body
 
 for.exit:                                         ; preds = %for.body