<div dir="ltr">Hi all,<br><br>This is a problem that occurs for me only on Darwin (MacOS) and not on Linux.<br><br>When llvm 2.8 (or 2.9) is compiled with ENABLE_OPTIMIZED=1, the "opt" tool fails to load LLVM passes in dynamic libraries (.dylib) files, regardless of how they themselves were built. When opt is built with ENABLE_OPTIMIZED=0, all is well. <br>
<br>Here is some informative output. Seems to me the problem is in stripping the symbols of the assignPassManager virtual method from the various subclasses of llvm::Pass. <br><br>Please advise!<br><br><br>// the release version has all the necessary symbols in place before it is installed to /usr/local/bin<br>
$ nm -m Release+Asserts/bin/opt | grep assignPass<br>000000010042b7c0 (__TEXT,__text) external __ZN4llvm10ModulePass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>00000001002a27c0 (__TEXT,__text) external __ZN4llvm10RegionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
000000010042b490 (__TEXT,__text) external __ZN4llvm12FunctionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>000000010042b260 (__TEXT,__text) external __ZN4llvm14BasicBlockPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
00000001002053a0 (__TEXT,__text) external __ZN4llvm16CallGraphSCCPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>00000001004223d0 (__TEXT,__text) weak external __ZN4llvm4Pass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
0000000100262120 (__TEXT,__text) external __ZN4llvm8LoopPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>00000001004d7936 (__TEXT,__cstring) non-external __ZZN4llvm10ModulePass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>
00000001004bcf42 (__TEXT,__cstring) non-external __ZZN4llvm10RegionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>00000001004d7924 (__TEXT,__cstring) non-external __ZZN4llvm12FunctionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>
00000001004d7901 (__TEXT,__cstring) non-external __ZZN4llvm14BasicBlockPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>00000001004b404f (__TEXT,__cstring) non-external __ZZN4llvm16CallGraphSCCPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>
00000001004b9ce0 (__TEXT,__cstring) non-external __ZZN4llvm8LoopPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br><br>// same is true for the debug build <br>$ nm -m Debug+Asserts/bin/opt | grep assignPass<br>
000000010040ea82 (__TEXT,__text) external __ZN4llvm10ModulePass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>0000000100299a82 (__TEXT,__text) external __ZN4llvm10RegionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
000000010040e8a0 (__TEXT,__text) external __ZN4llvm12FunctionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>000000010040e758 (__TEXT,__text) external __ZN4llvm14BasicBlockPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
00000001001fcb5e (__TEXT,__text) external __ZN4llvm16CallGraphSCCPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>00000001004093a8 (__TEXT,__text) weak external __ZN4llvm4Pass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
000000010025687e (__TEXT,__text) external __ZN4llvm8LoopPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>00000001004e349b (__TEXT,__cstring) non-external __ZZN4llvm10ModulePass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>
00000001004c8414 (__TEXT,__cstring) non-external __ZZN4llvm10RegionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>00000001004e3489 (__TEXT,__cstring) non-external __ZZN4llvm12FunctionPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>
00000001004e3466 (__TEXT,__cstring) non-external __ZZN4llvm14BasicBlockPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>00000001004bf4e6 (__TEXT,__cstring) non-external __ZZN4llvm16CallGraphSCCPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br>
00000001004c5402 (__TEXT,__cstring) non-external __ZZN4llvm8LoopPass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeEE8__func__<br><br>// however, once it is installed with "make install" to /usr/local/bin, it's stripped of most of the relevant symbols (those of the llvm::Pass subclasses)<br>
$ nm -m /usr/local/bin/opt | grep assignPass<br>00000001004223d0 (__TEXT,__text) weak external __ZN4llvm4Pass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br><br>// my dynamic library contains a ModulePass, with a matching symbol that is missing in the installed "opt" binary<br>
$ nm -m /usr/local/lib/libMyPass.dylib | grep assignPass<br>         (undefined) external __ZN4llvm10ModulePass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br><br>// and indeed, when opt tries to load it, it fails.                  <br>
$ opt -load /usr/local/lib/libMyPass.dylib <br>Error opening '/usr/local/lib/libMyPass.dylib': dlopen(/usr/local/lib/libMyPass.dylib, 9): Symbol not found: __ZN4llvm10ModulePass17assignPassManagerERNS_7PMStackENS_15PassManagerTypeE<br>
  Referenced from: /usr/local/lib/libMyPass.dylib<br>  Expected in: flat namespace<br> in /usr/local/lib/libMyPass.dylib<br>  -load request ignored.<br><br><br>Thanks a lot,<br><br>Harel Cain<br>
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