1Test multi-thread merge of multiple profdata files.
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3RUN: llvm-profdata merge %p/Inputs/multiple-profdata-merge.proftext -o %t
4RUN: llvm-profdata merge -j 4 %t %t %t %t -o %t_2
5RUN: llvm-profdata show %t_2 | FileCheck %s
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7; CHECK:Total functions: 11
8; CHECK:Maximum function count: 5600000
9; CHECK:Maximum internal block count: 2800000
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