Some very basic tests for the multiple input cases.

RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-2.proftext -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO3
RUN: llvm-profdata merge %p/Inputs/foo3-2.proftext %p/Inputs/foo3-1.proftext -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO3
FOO3: foo:
FOO3: Counters: 3
FOO3: Function count: 8
FOO3: Block counts: [7, 6]
FOO3: Total functions: 1
FOO3: Maximum function count: 8
FOO3: Maximum internal block count: 7

RUN: llvm-profdata merge %p/Inputs/empty.proftext %p/Inputs/foo3-1.proftext -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO3EMPTY
FOO3EMPTY: foo:
FOO3EMPTY: Counters: 3
FOO3EMPTY: Function count: 1
FOO3EMPTY: Block counts: [2, 3]
FOO3EMPTY: Total functions: 1
FOO3EMPTY: Maximum function count: 1
FOO3EMPTY: Maximum internal block count: 3

RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3bar3-1.proftext -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefixes=FOO3FOO3BAR3,FOO3FOO3BAR3-1
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefixes=FOO3FOO3BAR3,FOO3FOO3BAR3-2
FOO3FOO3BAR3-1: foo:
FOO3FOO3BAR3-1: Counters: 3
FOO3FOO3BAR3-1: Function count: 3
FOO3FOO3BAR3-1: Block counts: [5, 8]
FOO3FOO3BAR3-2: bar:
FOO3FOO3BAR3-2: Counters: 3
FOO3FOO3BAR3-2: Function count: 7
FOO3FOO3BAR3-2: Block counts: [11, 13]
FOO3FOO3BAR3: Total functions: 2
FOO3FOO3BAR3: Maximum function count: 7
FOO3FOO3BAR3: Maximum internal block count: 13

RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/bar3-1.proftext -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefixes=DISJOINT,DISJOINT-1
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefixes=DISJOINT,DISJOINT-2
DISJOINT-1: foo:
DISJOINT-1: Counters: 3
DISJOINT-1: Function count: 1
DISJOINT-1: Block counts: [2, 3]
DISJOINT-2: bar:
DISJOINT-2: Counters: 3
DISJOINT-2: Function count: 1
DISJOINT-2: Block counts: [2, 3]
DISJOINT: Total functions: 2
DISJOINT: Maximum function count: 1
DISJOINT: Maximum internal block count: 3

RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     -num-threads 2 -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO4
RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     -j 3 -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO4
FOO4: foo:
FOO4: Counters: 3
FOO4: Function count: 4
FOO4: Block counts: [8, 12]
FOO4: Total functions: 1
FOO4: Maximum function count: 4
FOO4: Maximum internal block count: 12

RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext -j 2 -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO5
RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext -j 3 -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO5
RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO5
RUN: llvm-profdata merge %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext %p/Inputs/foo3-1.proftext \
RUN:                     %p/Inputs/foo3-1.proftext -j 1 -o %t
RUN: llvm-profdata show %t -all-functions -counts | FileCheck %s --check-prefix=FOO5
FOO5: foo:
FOO5: Counters: 3
FOO5: Function count: 5
FOO5: Block counts: [10, 15]
FOO5: Total functions: 1
FOO5: Maximum function count: 5
FOO5: Maximum internal block count: 15