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...tionDAG/DAGCombiner.cpp:7732 #10 0x00acd9c0 in llvm::SelectionDAGISel::CodeGenAndEmitDAG (this=0x1be9f40) at /export/home/karel/vcs/llvm-head/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:559 #11 0x00acc9a0 in llvm::SelectionDAGISel::SelectBasicBlock (this=0x1be9f40, Begin=..., End=..., HadTailCall=@0x7ee91158) at /export/home/karel/vcs/llvm-head/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:414 #12 0x00acf420 in llvm::SelectionDAGISel::SelectAllBasicBlocks (this=0x1be9f40, Fn=...) at /export/home/karel/vcs/llvm-head/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:972 #13 0x00acbee...

...ectionDAGBuilder.cpp:5870 frame #8: 0x00000001008fc9ea libjvm.dylib`llvm::SelectionDAGBuilder::visit(this=0x0000000106ff4d20, I=0x0000000106fea460) + 74 at SelectionDAGBuilder.cpp:971 frame #9: 0x0000000100947e98 libjvm.dylib`llvm::SelectionDAGISel::SelectBasicBlock(this=0x0000000106ff40d0, HadTailCall=0x00007fff5fbfe31e) + 40 at SelectionDAGISel.cpp:579 frame #10: 0x0000000100947aee libjvm.dylib`llvm::SelectionDAGISel::SelectAllBasicBlocks(this=0x0000000106ff40d0, Fn=0x0000000106fe7020) + 8174 at SelectionDAGISel.cpp:1192 frame #11: 0x0000000100944b94 libjvm.dylib`llvm::SelectionDAGISel:...

...t; frame #8: 0x00000001008fc9ea > libjvm.dylib`llvm::SelectionDAGBuilder::visit(this=0x0000000106ff4d20, > I=0x0000000106fea460) + 74 at SelectionDAGBuilder.cpp:971 > frame #9: 0x0000000100947e98 > libjvm.dylib`llvm::SelectionDAGISel::SelectBasicBlock(this=0x0000000106ff40d0, > HadTailCall=0x00007fff5fbfe31e) + 40 at SelectionDAGISel.cpp:579 > frame #10: 0x0000000100947aee > libjvm.dylib`llvm::SelectionDAGISel::SelectAllBasicBlocks(this=0x0000000106ff40d0, > Fn=0x0000000106fe7020) + 8174 at SelectionDAGISel.cpp:1192 > frame #11: 0x0000000100944b94 > libjvm.dylib`...

...32 > #10 0x00acd9c0 in llvm::SelectionDAGISel::CodeGenAndEmitDAG (this=0x1be9f40) >     at > /export/home/karel/vcs/llvm-head/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:559 > #11 0x00acc9a0 in llvm::SelectionDAGISel::SelectBasicBlock > (this=0x1be9f40, Begin=..., End=..., >     HadTailCall=@0x7ee91158) >     at > /export/home/karel/vcs/llvm-head/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:414 > #12 0x00acf420 in llvm::SelectionDAGISel::SelectAllBasicBlocks > (this=0x1be9f40, Fn=...) >     at > /export/home/karel/vcs/llvm-head/lib/CodeGen/SelectionDAG/SelectionDAGI...

...onDAG/LegalizeDAG.cpp:3689 #6 0x00007ffff6fb3862 in llvm::SelectionDAGISel::CodeGenAndEmitDAG (this=0x697230) at /home/dmikushin/sandbox/src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:632 #7 0x00007ffff6fb2a84 in llvm::SelectionDAGISel::SelectBasicBlock (this=0x697230, Begin=..., End=..., HadTailCall=@0x7fffffffd880) at /home/dmikushin/sandbox/src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:499 #8 0x00007ffff6fb5792 in llvm::SelectionDAGISel::SelectAllBasicBlocks (this=0x697230, Fn=...) at /home/dmikushin/sandbox/src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1160 #9 0x0000...

...frame #8: 0x00000001008fc9ea > libjvm.dylib`llvm::SelectionDAGBuilder::visit(this=0x0000000106ff4d20, > I=0x0000000106fea460) + 74 at SelectionDAGBuilder.cpp:971 > frame #9: 0x0000000100947e98 > > libjvm.dylib`llvm::SelectionDAGISel::SelectBasicBlock(this=0x0000000106ff40d0, > HadTailCall=0x00007fff5fbfe31e) + 40 at SelectionDAGISel.cpp:579 > frame #10: 0x0000000100947aee > > libjvm.dylib`llvm::SelectionDAGISel::SelectAllBasicBlocks(this=0x0000000106ff40d0, > Fn=0x0000000106fe7020) + 8174 at SelectionDAGISel.cpp:1192 > frame #11: 0x0000000100944b94 > > lib...

...9 > #6 0x00007ffff6fb3862 in llvm::SelectionDAGISel::CodeGenAndEmitDAG > (this=0x697230) at > /home/dmikushin/sandbox/src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:632 > #7 0x00007ffff6fb2a84 in llvm::SelectionDAGISel::SelectBasicBlock > (this=0x697230, Begin=..., End=..., HadTailCall=@0x7fffffffd880) > at /home/dmikushin/sandbox/src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:499 > #8 0x00007ffff6fb5792 in llvm::SelectionDAGISel::SelectAllBasicBlocks > (this=0x697230, Fn=...) at > /home/dmikushin/sandbox/src/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel....

Hi Ankur, > The flags "-view-sched-dags".. described in the doc doesn't seem to work. ( > "llc -help" doesn't list it ). as far as I remember, displaying DAGs during compilation is only enabled in "debug builds" [1] of LLVM. You probably have to re-configure and re-compile LLVM to enable this feature. Best regards, Christoph [1]

On Aug 27, 2010, at 11:53 AMPDT, Yuri wrote: > On 08/27/2010 11:32, Yuri wrote: >> As I understand only one of TCRETURNri64 and RET should be created. >> I have sources of rev.112200. >> >> Here is the stack when TCRETURNri64 instruction is created: >> #1 0x0000000802c8b4e2 in llvm::MachineFunction::CreateMachineInstr >> (this=0x30eb000, TID=@0x803a78940,

...const llvm::Instruction&>> = {<No data fields>}, NodePtr = 0x4530ed0}, End={<std::iterator<std::bidirectional_iterator_tag, const llvm::Instruction, long int, const llvm::Instruction*, const llvm::Instruction&>> = {<No data fields>}, NodePtr = 0x493f240}, HadTailCall=@0x7fffffff853f) at /tmp/llvm-svn/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:364 #8 0x0000000803276048 in llvm::SelectionDAGISel::SelectAllBasicBlocks (this=0x45174d0, Fn=@0x4530bd0) at /tmp/llvm-svn/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:744 #9 0x00000008032737f7 in llvm::...

I am trying to understand the SelectionDAG construction from LLVM IR. I have gone through the doc "The LLVM Target-Independent Code Generator" on LLVM site. This gives a great initial overview. However I am unable to catch the actual control flow for the llvm->selectionDag conversion. The flags "-view-sched-dags".. described in the doc doesn't seem to work. ( "llc

...llvm::Instruction&>> = {<No data fields>}, NodePtr = 0x92b41ac}, End= {<std::iterator<std::bidirectional_iterator_tag,const llvm::Instruction,ptrdiff_t,const llvm::Instruction*,const llvm::Instruction&>> = {<No data fields>}, NodePtr = 0x92af688}, HadTailCall=@0x8046c7b) at SelectionDAGISel.cpp:432 #13 0x08b0442e in llvm::SelectionDAGISel::SelectAllBasicBlocks (this=0x92bdb50, Fn=@0x92b3f50) at SelectionDAGISel.cpp:981 #14 0x08b01f7c in llvm::SelectionDAGISel::runOnMachineFunction (this=0x92bdb50, mf=@0x92ce000) at SelectionDAGISel.cpp:307 #...

On 08/27/2010 11:32, Yuri wrote: > As I understand only one of TCRETURNri64 and RET should be created. > I have sources of rev.112200. > > Here is the stack when TCRETURNri64 instruction is created: > #1 0x0000000802c8b4e2 in llvm::MachineFunction::CreateMachineInstr > (this=0x30eb000, TID=@0x803a78940, DL={LineCol = 0, ScopeIdx = 0}, > NoImp=false) at