[llvm] 7a529ad - [Support] Don't initialize buffer allocated by zlib::uncompress

[Benjamin Kramer via llvm-commits]

Author: Benjamin Kramer
Date: 2020-05-03T15:01:52+02:00
New Revision: 7a529ad2c142eb77ff1140e166fb85242d4cf05f

URL: https://github.com/llvm/llvm-project/commit/7a529ad2c142eb77ff1140e166fb85242d4cf05f
DIFF: https://github.com/llvm/llvm-project/commit/7a529ad2c142eb77ff1140e166fb85242d4cf05f.diff

LOG: [Support] Don't initialize buffer allocated by zlib::uncompress

This is a somewhat annoying API, but not without precedend in this low
level API.

Added: 
    

Modified: 
    llvm/lib/Support/Compression.cpp

Removed: 
    


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diff  --git a/llvm/lib/Support/Compression.cpp b/llvm/lib/Support/Compression.cpp
index 97d5ffaadf82..27d92f0e0aec 100644
--- a/llvm/lib/Support/Compression.cpp
+++ b/llvm/lib/Support/Compression.cpp
@@ -74,10 +74,10 @@ Error zlib::uncompress(StringRef InputBuffer, char *UncompressedBuffer,
 Error zlib::uncompress(StringRef InputBuffer,
                        SmallVectorImpl<char> &UncompressedBuffer,
                        size_t UncompressedSize) {
-  UncompressedBuffer.resize(UncompressedSize);
+  UncompressedBuffer.reserve(UncompressedSize);
   Error E =
       uncompress(InputBuffer, UncompressedBuffer.data(), UncompressedSize);
-  UncompressedBuffer.resize(UncompressedSize);
+  UncompressedBuffer.set_size(UncompressedSize);
   return E;
 }