Fix the Linker testcase regressions, by making MemoryBuffer::getFileOrSTDIN return
a valid but empty buffer if stdin is empty. llvm-svn: 44219
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b01e500f16
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44158478bb
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@ -88,14 +88,11 @@ public:
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/// getFileOrSTDIN - Open the specified file as a MemoryBuffer, or open stdin
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/// if the Filename is "-". If an error occurs, this returns null and fills
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/// in *ErrStr with a reason.
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/// in *ErrStr with a reason. If stdin is empty, this API (unlike getSTDIN)
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/// returns an empty buffer.
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static MemoryBuffer *getFileOrSTDIN(const char *FilenameStart,unsigned FnSize,
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std::string *ErrStr = 0,
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int64_t FileSize = -1) {
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if (FnSize == 1 && FilenameStart[0] == '-')
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return getSTDIN();
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return getFile(FilenameStart, FnSize, ErrStr, FileSize);
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}
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int64_t FileSize = -1);
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/// getFileOrSTDIN - Open the specified file as a MemoryBuffer, or open stdin
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/// if the Filename is "-". If an error occurs, this returns null and fills
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@ -117,6 +117,24 @@ MemoryBuffer *MemoryBuffer::getNewMemBuffer(unsigned Size,
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}
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/// getFileOrSTDIN - Open the specified file as a MemoryBuffer, or open stdin
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/// if the Filename is "-". If an error occurs, this returns null and fills
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/// in *ErrStr with a reason. If stdin is empty, this API (unlike getSTDIN)
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/// returns an empty buffer.
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MemoryBuffer *MemoryBuffer::getFileOrSTDIN(const char *FilenameStart,
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unsigned FnSize,
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std::string *ErrStr,
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int64_t FileSize) {
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if (FnSize != 1 || FilenameStart[0] != '-')
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return getFile(FilenameStart, FnSize, ErrStr, FileSize);
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MemoryBuffer *M = getSTDIN();
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if (M) return M;
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// If stdin was empty, M is null. Cons up an empty memory buffer now.
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const char *EmptyStr = "";
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return MemoryBuffer::getMemBuffer(EmptyStr, EmptyStr, "<stdin>");
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}
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//===----------------------------------------------------------------------===//
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// MemoryBufferMMapFile implementation.
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//===----------------------------------------------------------------------===//
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