<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Aug 22, 2010, at 10:58 AM, Douglas Gregor wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Aug 22, 2010, at 3:59 AM, John McCall wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Author: rjmccall<br>Date: Sun Aug 22 05:59:02 2010<br>New Revision: 111776<br><br>URL: <a href="http://llvm.org/viewvc/llvm-project?rev=111776&view=rev">http://llvm.org/viewvc/llvm-project?rev=111776&view=rev</a><br>Log:<br>Experiment with using first-class aggregates to represent member function<br>pointers. I find the resulting code to be substantially cleaner, and it<br>makes it very easy to use the same APIs for data member pointers (which I have<br>conscientiously avoided here), and it avoids a plethora of potential<br>inefficiencies due to excessive memory copying, but we'll have to see if it<br>actually works.<br></div></blockquote></div><br><div>FYI, this is breaking self-host on Darwin, with:</div><div><br></div><div><span class="Apple-style-span" style="font-family: Times; "><pre><span class="stderr" style="font-family: 'Courier New', courier, monotype; color: red; ">clang: /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/tools/clang/lib/CodeGen/CGExprScalar.cpp:576: llvm::Value*<unnamed>::ScalarExprEmitter::EmitNullValue(clang::QualType): Assertion `!Ty->isMemberFunctionPointerType() && "member function pointers are not scalar!"' failed.
0 clang 0x00000000015ffdff
1 clang 0x0000000001601e82
2 libpthread.so.0 0x00002b91603b9f60
3 libc.so.6 0x00002b9160fab175 gsignal + 53
4 libc.so.6 0x00002b9160fadf80 abort + 384
5 libc.so.6 0x00002b9160fa42b1 __assert_fail + 241
6 clang 0x00000000007d5379
7 clang 0x00000000007db837
8 clang 0x00000000007df087 clang::CodeGen::CodeGenFunction::EmitScalarExpr(clang::Expr const*, bool) + 87
9 clang 0x00000000007b52a7 clang::CodeGen::CodeGenFunction::EmitAnyExpr(clang::Expr const*, llvm::Value*, bool, bool, bool) + 247
10 clang 0x00000000007b538e clang::CodeGen::CodeGenFunction::EmitAnyExprToTemp(clang::Expr const*, bool, bool) + 78
11 clang 0x0000000000780341 clang::CodeGen::CodeGenFunction::EmitCallArg(clang::Expr const*, clang::QualType) + 65
12 clang 0x00000000007c9adf void clang::CodeGen::CodeGenFunction::EmitCallArgs<clang::FunctionProtoType>(llvm::SmallVector<std::pair<clang::CodeGen::RValue, clang::QualType>, 16u>&, clang::FunctionProtoType const*, clang::ConstExprIterator, clang::ConstExprIterator) + 527
13 clang 0x00000000007c35a4 clang::CodeGen::CodeGenFunction::EmitCXXMemberCall(clang::CXXMethodDecl const*, llvm::Value*, clang::CodeGen::ReturnValueSlot, llvm::Value*, llvm::Value*, clang::ConstExprIterator, clang::ConstExprIterator) + 564
14 clang 0x00000000007c472d clang::CodeGen::CodeGenFunction::EmitCXXMemberCallExpr(clang::CXXMemberCallExpr const*, clang::CodeGen::ReturnValueSlot) + 1053
15 clang 0x00000000007b258e clang::CodeGen::CodeGenFunction::EmitCallExpr(clang::CallExpr const*, clang::CodeGen::ReturnValueSlot) + 398
16 clang 0x00000000007b271e clang::CodeGen::CodeGenFunction::EmitCallExprLValue(clang::CallExpr const*) + 46
17 clang 0x00000000007b83a6 clang::CodeGen::CodeGenFunction::EmitLValue(clang::Expr const*) + 1750
18 clang 0x00000000007bd275
19 clang 0x00000000007bd672 clang::CodeGen::CodeGenFunction::EmitReferenceBindingToExpr(clang::Expr const*, clang::NamedDecl const*) + 50
20 clang 0x000000000082c6ae clang::CodeGen::CodeGenFunction::EmitReturnStmt(clang::ReturnStmt const&) + 542
21 clang 0x000000000082ce3c clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*) + 876
22 clang 0x000000000082f8ff clang::CodeGen::CodeGenFunction::EmitCompoundStmt(clang::CompoundStmt const&, bool, llvm::Value*, bool) + 239
23 clang 0x000000000082fbbc clang::CodeGen::CodeGenFunction::EmitSimpleStmt(clang::Stmt const*) + 236
24 clang 0x000000000082caec clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*) + 28
25 clang 0x000000000084f2cb clang::CodeGen::CodeGenFunction::GenerateCode(clang::CodeGen::GlobalDecl, llvm::Function*) + 875
26 clang 0x00000000007534aa clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::CodeGen::GlobalDecl) + 522
27 clang 0x0000000000756c32 clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::CodeGen::GlobalDecl) + 194
28 clang 0x0000000000757527 clang::CodeGen::CodeGenModule::EmitDeferred() + 151
29 clang 0x00000000007575a9 clang::CodeGen::CodeGenModule::Release() + 9
30 clang 0x000000000074a838
31 clang 0x0000000000867ecd clang::ParseAST(clang::Sema&, bool) + 301
32 clang 0x000000000074b7c4 clang::CodeGenAction::ExecuteAction() + 68
33 clang 0x000000000063c33d clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) + 349
34 clang 0x000000000064e39c clang::ExecuteCompilerInvocation(clang::CompilerInstance*) + 1324
35 clang 0x0000000000631493 cc1_main(char const**, char const**, char const*, void*) + 611
36 clang 0x0000000000637efb main + 4011
37 libc.so.6 0x00002b9160f97c4d __libc_start_main + 253
38 clang 0x000000000062fc59
Stack dump:
0. Program arguments: /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.install.1/bin/clang -cc1 -triple x86_64-pc-linux-gnu -S -disable-free -main-file-name LLVMCConfigurationEmitter.cpp -pic-level 2 -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-linker-version 2.20.1 -resource-dir /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.install.1/lib/clang/2.8 -dependency-file /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.obj.2/utils/TableGen/Release+Asserts/LLVMCConfigurationEmitter.d.tmp -MP -MT /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.obj.2/utils/TableGen/Release+Asserts/LLVMCConfigurationEmitter.o -MT /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.obj.2/utils/TableGen/Release+Asserts/LLVMCConfigurationEmitter.d -D _DEBUG -D _GNU_SOURCE -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -I /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.obj.2/include -I /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.obj.2/utils/TableGen -I /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/include -I /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/utils/TableGen -O3 -Woverloaded-virtual -Wcast-qual -Wno-long-long -Wall -W -Wno-unused-parameter -Wwrite-strings -pedantic -ferror-limit 19 -fmessage-length 0 -fexceptions -fgnu-runtime -fdiagnostics-show-option -o /tmp/cc-Sx141Z.s -x c++ /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/utils/TableGen/LLVMCConfigurationEmitter.cpp
1. <eof> parser at end of file
2. Per-file LLVM IR generation
3. /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/include/llvm/ADT/StringMap.h:388:28: Generating code for declaration 'llvm::StringMap<void (<anonymous>::EmitPreprocessOptionsCallback::*)(llvm::DagInit const &, unsigned int, llvm::raw_ostream &) const, llvm::MallocAllocator>::GetOrCreateValue'
4. /build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.src/include/llvm/ADT/StringMap.h:388:60: LLVM IR generation of compound statement ('{}')
clang: error: clang frontend command failed due to signal 6 (use -v to see invocation)
make[3]: *** [/build/buildbot-llvm/clang-x86_64-linux-selfhost-rel/llvm.obj.2/utils/TableGen/Release+Asserts/</span></pre></span></div></div></blockquote>Actually, this is just a leftover assertion. Fixed in r111782.</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>- Doug</div><br></body></html>