SPARC backend crashes when emitting dwarf debug information from dbg_value

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Bugzilla Link	PR8996
Status	RESOLVED FIXED
Importance	P normal
Reported by	Venkatraman Govindaraju (venkatra@cs.wisc.edu)
Reported on	2011-01-17 23:39:53 -0800
Last modified on	2011-10-26 14:48:49 -0700
Version	trunk
Hardware	Sun Solaris
CC	llvm-bugs@lists.llvm.org, pawel@32bitmicro.com
Fixed by commit(s)
Attachments	bugpoint-reduced-simplified.ll (10014 bytes, application/octet-stream)
Blocks
Blocked by
See also

Created attachment 6019
testcase

When generating code for the attached file, SPARC backend crashes. (See below)
The crash occurs because DwarfDebug::addVariableAddress calls TFI-
>getFrameIndexReference() with the immediate value from a DBG_VALUE
instruction. But the frame index is already eliminated by the PEI pass.

llc -march=sparc test/CodeGen/SPARC/bugpoint-reduced-simplified.ll

llc: ../llvm/include/llvm/CodeGen/MachineFrameInfo.h:373: int64_t
llvm::MachineFrameInfo::getObjectOffset(int) const: Assertion
`unsigned(ObjectIdx+NumFixedObjects) < Objects.size() && "Invalid Object Idx!"'
failed.
1  llc             0x000000000133fb0c
2  libpthread.so.0 0x000000344bc0eb10
3  libc.so.6       0x000000344b030265 gsignal + 53
4  libc.so.6       0x000000344b031d10 abort + 272
5  libc.so.6       0x000000344b0296e6 __assert_fail + 246
6  llc             0x0000000000a0b608
llvm::MachineFrameInfo::getObjectOffset(int) const + 94
7  llc             0x00000000011af86d
llvm::TargetFrameLowering::getFrameIndexOffset(llvm::MachineFunction const&,
int) const + 45
8  llc             0x00000000011af722
llvm::TargetFrameLowering::getFrameIndexReference(llvm::MachineFunction const&,
int, unsigned int&) const + 112
9  llc             0x0000000000ebdf2d
llvm::DwarfDebug::addVariableAddress(llvm::DbgVariable*&, llvm::DIE*, long) +
113
10 llc             0x0000000000ebe546
llvm::DwarfDebug::constructVariableDIE(llvm::DbgVariable*, llvm::DbgScope*) +
1424
11 llc             0x0000000000ebe99e
llvm::DwarfDebug::constructScopeDIE(llvm::DbgScope*) + 604
12 llc             0x0000000000ebea02
llvm::DwarfDebug::constructScopeDIE(llvm::DbgScope*) + 704
13 llc             0x0000000000ebee64
llvm::DwarfDebug::endFunction(llvm::MachineFunction const*) + 972
14 llc             0x0000000000eab6a4 llvm::AsmPrinter::EmitFunctionBody() +
2080
15 llc             0x0000000000a082e1
llvm::AsmPrinter::runOnMachineFunction(llvm::MachineFunction&) + 47
16 llc             0x0000000000f41e8b
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 85
17 llc             0x0000000001279ce2
llvm::FPPassManager::runOnFunction(llvm::Function&) + 350
18 llc             0x0000000001279eb7
llvm::FPPassManager::runOnModule(llvm::Module&) + 81
19 llc             0x00000000012799a3
llvm::MPPassManager::runOnModule(llvm::Module&) + 381
20 llc             0x000000000127b133 llvm::PassManagerImpl::run(llvm::Module&)
+ 111
21 llc             0x000000000127b195 llvm::PassManager::run(llvm::Module&) + 33
22 llc             0x00000000009970e7 main + 2201
23 libc.so.6       0x000000344b01d994 __libc_start_main + 244
24 llc             0x0000000000995949
Stack dump:
0.      Program arguments: llc -march=sparc
1.      Running pass 'Function Pass Manager' on module '<stdin>'.
2.      Running pass 'Sparc Assembly Printer' on function
'@CheckReliabilityOfRef'
Aborted

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Attached bugpoint-reduced-simplified.ll (10014 bytes, application/octet-stream): testcase

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Crash does not happen in current TOT r143046 nor LLVM-3.0 r143043 on Ubuntu-x86_64

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Tested with the current on Solaris. Cannot reproduce this bug anymore.