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1Tests for overflow when merging instrumented profiles.2 31- Merge profile having maximum counts with itself and verify overflow detected and saturation occurred4RUN: llvm-profdata merge -instr %p/Inputs/overflow-instr.proftext %p/Inputs/overflow-instr.proftext -o %t.out 2>&1 | FileCheck %s -check-prefix=MERGE_OVERFLOW5RUN: llvm-profdata show -instr -all-functions -counts %t.out | FileCheck %s --check-prefix=SHOW_OVERFLOW6MERGE_OVERFLOW: {{.*}}.proftext: overflow: counter overflow7SHOW_OVERFLOW: Function count: 184467440737095516138SHOW_OVERFLOW-NEXT: Block counts: [18446744073709551613, 18446744073709551613]9 102- Merge profile having maximum counts by itself and verify no overflow11RUN: llvm-profdata merge -instr %p/Inputs/overflow-instr.proftext -o %t.out 2>&1 | FileCheck %s -check-prefix=MERGE_NO_OVERFLOW -allow-empty12RUN: llvm-profdata show -instr -all-functions -counts %t.out | FileCheck %s --check-prefix=SHOW_NO_OVERFLOW13MERGE_NO_OVERFLOW-NOT: {{.*}}.proftext: overflow: counter overflow14SHOW_NO_OVERFLOW: Function count: 1844674407370955161315SHOW_NO_OVERFLOW-NEXT: Block counts: [9223372036854775808, 18446744073709551613]16 17