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MemoryBuffer.cpp: Consider if PageSize were not 4096 in shouldUseMmap(). Follow-up to r188903.

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The AllocationGranularity can be 65536 on Win32, even on Cygwin.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188998 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
NAKAMURA Takumi 2013-08-22 10:23:52 +00:00
parent f6db942564
commit 378cd84adf
1 changed files with 1 additions and 1 deletions
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lib/Support/MemoryBuffer.cpp
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@ -276,7 +276,7 @@ static bool shouldUseMmap(int FD,
int PageSize) {
// We don't use mmap for small files because this can severely fragment our
// address space.
if (MapSize < 4096*4)
if (MapSize < 4 * 4096 || MapSize < (unsigned)PageSize)
return false;
if (!RequiresNullTerminator)