[PassManager] add tests for vector pass enabling; NFC

; RUN: opt -O1                    -debug-pass=Structure  < %s -o /dev/null 2>&1 | FileCheck %s --check-prefixes=OLDPM_O1

; RUN: opt -O2                    -debug-pass=Structure  < %s -o /dev/null 2>&1 | FileCheck %s --check-prefixes=OLDPM_O2

; RUN: opt -O1 -vectorize-loops=0 -debug-pass=Structure  < %s -o /dev/null 2>&1 | FileCheck %s --check-prefixes=OLDPM_O1_FORCE_OFF

; RUN: opt -O2 -vectorize-loops=0 -debug-pass=Structure  < %s -o /dev/null 2>&1 | FileCheck %s --check-prefixes=OLDPM_O2_FORCE_OFF

; RUN: opt -disable-verify -debug-pass-manager -passes='default<O1>' -S %s 2>&1 | FileCheck %s --check-prefixes=NEWPM_O1

; RUN: opt -disable-verify -debug-pass-manager -passes='default<O2>' -S %s 2>&1 | FileCheck %s --check-prefixes=NEWPM_O2

; REQUIRES: asserts

; SLP does not run at -O1. Loop vectorization runs, but it only

; works on loops explicitly annotated with pragmas.

; OLDPM_O1-LABEL:  Pass Arguments:

; OLDPM_O1:        Loop Vectorization

; OLDPM_O1:        Optimize scalar/vector ops

; OLDPM_O1-NOT:    SLP Vectorizer

; Everything runs at -O2.

; OLDPM_O2-LABEL:  Pass Arguments:

; OLDPM_O2:        Loop Vectorization

; OLDPM_O2:        Optimize scalar/vector ops

; OLDPM_O2:        SLP Vectorizer

; The loop vectorizer still runs at both -O1/-O2 even with the

; debug flag, but it only works on loops explicitly annotated

; with pragmas.

; OLDPM_O1_FORCE_OFF-LABEL:  Pass Arguments:

; OLDPM_O1_FORCE_OFF:        Loop Vectorization

; OLDPM_O1_FORCE_OFF:        Optimize scalar/vector ops

; OLDPM_O1_FORCE_OFF-NOT:    SLP Vectorizer

; OLDPM_O2_FORCE_OFF-LABEL:  Pass Arguments:

; OLDPM_O2_FORCE_OFF:        Loop Vectorization

; OLDPM_O2_FORCE_OFF:        Optimize scalar/vector ops

; OLDPM_O2_FORCE_OFF:        SLP Vectorizer

; There should be no difference with the new pass manager.

; This is tested more thoroughly in other test files.

; NEWPM_O1-LABEL:  Running pass: LoopVectorizePass

; NEWPM_O1:        Running pass: VectorCombinePass

; NEWPM_O1-NOT:    Running pass: SLPVectorizerPass

; NEWPM_O2-LABEL:  Running pass: LoopVectorizePass

; NEWPM_O2:        Running pass: VectorCombinePass

; NEWPM_O2:        Running pass: SLPVectorizerPass

define void @f() {

  ret void

}