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[llvm-mc] More meaningful error if input file doesn't exist.
Before we just printed on stderr the program name. Now at least we print the name of the file that doesn't exist. There's probably room for improvement of error handling in llvm-mc (and the tools in general), but still this is a step forward. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247518 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -395,6 +395,11 @@ int main(int argc, char **argv) {
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// construct the Triple object.
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Triple TheTriple(TripleName);
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if (InputFilename != "-" && !sys::fs::exists(InputFilename)) {
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errs() << ProgName << ": '" << InputFilename << "': "
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<< "No such file\n";
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return 1;
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}
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ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
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MemoryBuffer::getFileOrSTDIN(InputFilename);
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if (std::error_code EC = BufferPtr.getError()) {
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