[LLVMbugs] [Bug 24225] New: [powerpc-ubuntu] code generation failure for OpenCL with some builtins with double3

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24225

            Bug ID: 24225
           Summary: [powerpc-ubuntu] code generation failure for OpenCL
                    with some builtins with double3
           Product: new-bugs
           Version: 3.6
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
          Assignee: unassignedbugs at nondot.org
          Reporter: kanagak86 at yahoo.ca
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 14633
  --> https://llvm.org/bugs/attachment.cgi?id=14633&action=edit
bugpoint simplified version of the coge gen bug

Code generator bug from PPC64

The attached file causes a crash on PPC64 (Power 8) - Ubuntu 3.16.0-23-generic. 

The workload is from OpenCL built-ins. The bug was reproducible for built-ins
such as fmax, fmin, fract with data type of double & vec size of 3 (=double3).
The bug is found in high optimization (-O3). 

The last revision that it worked on was 3.6 r222776.  

The problem seem to be there for all 3.6.1 and 3.6.2. Last tested on 3.6.2
r242926. 

I have attached simplified version of the code generator bug created from bug
point.  

Thanks!

Here's the snap shot of the Error Info:

llc: SelectionDAG.cpp:5911: void
llvm::SelectionDAG::ReplaceAllUsesWith(llvm::SDNode *, llvm::SDNode *):
Assertion `(!From->hasAnyUseOfValue(i) || From->getValueType(i) ==
To->getValueType(i)) && "Cannot use this version of ReplaceAllUsesWith!"'
failed.
#0 0x10a442a8 llvm::sys::PrintStackTrace(_IO_FILE*)
(/home/kajank/compiler/llvm_362_r242926/Release+Asserts/bin/llc+0x10a442a8)
#1 0x10a45090 PrintStackTraceSignalHandler(void*)
(/home/kajank/compiler/llvm_362_r242926/Release+Asserts/bin/llc+0x10a45090)
#2 0x10a45a3c SignalHandler(int)
(/home/kajank/compiler/llvm_362_r242926/Release+Asserts/bin/llc+0x10a45a3c)
0  llc       0x0000000010a442a8 llvm::sys::PrintStackTrace(_IO_FILE*) + 120
1  llc       0x0000000010a45090
2  llc       0x0000000010a45a3c
3            0x00003fff910f0478 __kernel_sigtramp_rt64 + 0
4  libc.so.6 0x00003fff90c106b8 gsignal + 72
5  libc.so.6 0x00003fff90c1295c abort + 636
6  libc.so.6 0x00003fff90c06274
7  libc.so.6 0x00003fff90c06364 __assert_fail + 100
8  llc       0x0000000010278fac
llvm::SelectionDAG::ReplaceAllUsesWith(llvm::SDNode*, llvm::SDNode*) + 952
9  llc       0x00000000102f972c
llvm::SelectionDAGISel::DoInstructionSelection() + 948
10 llc       0x00000000102f8298 llvm::SelectionDAGISel::CodeGenAndEmitDAG() +
5316
11 llc       0x00000000102f6d58
llvm::SelectionDAGISel::SelectBasicBlock(llvm::ilist_iterator<llvm::Instruction
const>, llvm::ilist_iterator<llvm::Instruction const>, bool&) + 252
12 llc       0x00000000102f5e80
llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) + 7976
13 llc       0x00000000102f2ba4
llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) + 1712
14 llc       0x0000000010152c40
15 llc       0x00000000104a08e0
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 216
16 llc       0x0000000010947440
llvm::FPPassManager::runOnFunction(llvm::Function&) + 424
17 llc       0x00000000109477a8 llvm::FPPassManager::runOnModule(llvm::Module&)
+ 72
18 llc       0x0000000010947e58
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 1088
19 llc       0x00000000109484cc llvm::legacy::PassManager::run(llvm::Module&) +
28
20 llc       0x00000000100f8b60 main + 7524
21 libc.so.6 0x00003fff90bf4e80
22 libc.so.6 0x00003fff90bf5074 __libc_start_main + 196
Stack dump:
0.      Program arguments: llc bugpoint-reduced-simplified.bc
1.      Running pass 'Function Pass Manager' on module
'bugpoint-reduced-simplified.bc'.
2.      Running pass 'PowerPC DAG->DAG Pattern Instruction Selection' on
function '@__fmax_double3_3D_exec'
Aborted

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