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simple optimization: don't bother calling "exists" (which calls the syscall

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"access").  Instead, just let the open call fail if the file doesn't exist.
This reduces the # syscalls executed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29173 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-07-18 07:07:51 +00:00
parent 84bad2f96c
commit ff3d80ff7e
1 changed files with 0 additions and 3 deletions
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3
lib/System/Unix/MappedFile.inc
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@ -40,9 +40,6 @@ struct sys::MappedFileInfo {
};
void MappedFile::initialize() {
if (!path_.exists())
throw std::string("Can't open file: ") + path_.toString();
int mode = 0;
if (options_ & READ_ACCESS)
if (options_ & WRITE_ACCESS)