assertion failed in RegisterScavenging

[llvmbot]

Bugzilla Link	1266
Resolution	FIXED
Resolved on	Feb 22, 2010 12:45
Version	trunk
OS	Linux
Attachments	bugpoint-reduced-simplified.bc
Reporter	LLVM Bugzilla Contributor

Extended Description

laurov@edgy-laptop:/tmp$ llc bugpoint-reduced-simplified.bc
llc: /home/laurov/llvm/llvm/lib/CodeGen/RegisterScavenging.cpp:138: void
llvm::RegScavenger::forward(): Assertion `isUsed(Reg)' failed.
llc((anonymous namespace)::PrintStackTrace()+0x1a)[0x88b929a]
llc((anonymous namespace)::SignalHandler(int)+0x112)[0x88b9560]
[0xffffe420]
/lib/tls/i686/cmov/libc.so.6(abort+0x103)[0xb7da1ef3]
/lib/tls/i686/cmov/libc.so.6(__assert_fail+0xfb)[0xb7d99dbb]
llc(llvm::RegScavenger::forward()+0x389)[0x8723507]
llc(llvm::RegScavenger::forward(llvm::ilist_iteratorllvm::MachineInstr)+0x13)[0x84475c3]
llc[0x870dd3e]
llc[0x870fcf2]
llc(llvm::MachineFunctionPass::runOnFunction(llvm::Function&)+0x28)[0x83f802e]
llc(llvm::FPPassManager::runOnFunction(llvm::Function&)+0x13a)[0x8845ac6]
llc(llvm::FunctionPassManagerImpl::run(llvm::Function&)+0x6e)[0x8845d4a]
llc(llvm::FunctionPassManager::run(llvm::Function&)+0x88)[0x8845e0a]
llc(main+0xbaa)[0x83c920e]
/lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xdc)[0xb7d8c8cc]
llc(__gxx_personality_v0+0x17d)[0x83c7581]
Aborted (core dumped)

[llvmbot]

This is in the common code gen library.

[lattner]

Evan, can you take a look? Thanks,

-Chris

[llvmbot]

This only crashes for me with -enable-tail-merge; it may be caused or exposed by my change in that area.

[lattner]

ok, Dale, plz investigate.

[llvmbot]

Fixed.

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070326/046281.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070326/046282.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070326/046284.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070326/046285.html