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Fix some undefined beahvior in FileMapping.

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This was broken when building a 32-bit native toolchain, as
shifting a size_t right by 32 is UB when sizeof(size_t) == 8.

llvm-svn: 318462
This commit is contained in:
Zachary Turner 2017-11-16 22:39:55 +00:00
parent 8f207e5630
commit d88146d1b5
1 changed files with 2 additions and 2 deletions
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4
lib/Support/Windows/Path.inc
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@ -734,8 +734,8 @@ std::error_code mapped_file_region::init(int FD, uint64_t Offset,
HANDLE FileMappingHandle = HANDLE FileMappingHandle =
::CreateFileMappingW(FileHandle, 0, flprotect, ::CreateFileMappingW(FileHandle, 0, flprotect,
Size >> 32, Hi_32(Size),
Size & 0xffffffff, Lo_32(Size),
0); 0);
if (FileMappingHandle == NULL) { if (FileMappingHandle == NULL) {
std::error_code ec = mapWindowsError(GetLastError()); std::error_code ec = mapWindowsError(GetLastError());