[llvm-bugs] [Bug 33818] New: segfault in opt

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=33818

            Bug ID: 33818
           Summary: segfault in opt
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: bagel99 at gmail.com
                CC: llvm-bugs at lists.llvm.org

When compiling for arm cortex-m3, a seqfault in opt happens.  It appears that
someone is passing Ty=0 to ARMTargetLowering::isLegalAddressingMode.  Backtrace
follows:

#0  llvm::ARMTargetLowering::isLegalAddressingMode (this=0x348de10, DL=..., 
    AM=..., Ty=0x0, AS=0)
    at /home/bgl/work/llvm/lib/Target/ARM/ARMISelLowering.cpp:12384
#1  0x00000000009c2778 in
llvm::BasicTTIImplBase<llvm::ARMTTIImpl>::isLegalAddressingMode
(AddrSpace=<optimized out>, Scale=0, HasBaseReg=<optimized out>, 
    BaseOffset=0, BaseGV=0x3320ca8, Ty=<optimized out>, this=0x3428c58)
    at /home/bgl/work/llvm/include/llvm/CodeGen/BasicTTIImpl.h:119
#2  llvm::TargetTransformInfoImplCRTPBase<llvm::ARMTTIImpl>::getGEPCost (
    Operands=..., Ptr=<optimized out>, PointeeType=<optimized out>, 
    this=0x3428c58)
    at /home/bgl/work/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h:681
#3  llvm::BasicTTIImplBase<llvm::ARMTTIImpl>::getGEPCost (Operands=..., 
    Ptr=<optimized out>, PointeeType=<optimized out>, this=0x3428c58)
    at /home/bgl/work/llvm/include/llvm/CodeGen/BasicTTIImpl.h:155
#4  llvm::TargetTransformInfoImplCRTPBase<llvm::ARMTTIImpl>::getUserCost (
    Operands=..., U=<optimized out>, this=0x3428c58)
    at /home/bgl/work/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h:709
#5  llvm::TargetTransformInfo::Model<llvm::ARMTTIImpl>::getUserCost (
    this=0x3428c50, U=<optimized out>, Operands=...)
    at /home/bgl/work/llvm/include/llvm/Analysis/TargetTransformInfo.h:1047
#6  0x000000000126b808 in llvm::TargetTransformInfo::getUserCost (
    this=this at entry=0x33527e0, U=U at entry=0x3323158, Operands=...)
    at /home/bgl/work/llvm/lib/Analysis/TargetTransformInfo.cpp:100
#7  0x00000000012d615d in llvm::TargetTransformInfo::getUserCost (
    this=this at entry=0x33527e0, U=U at entry=0x3323158)
    at /home/bgl/work/llvm/include/llvm/Analysis/TargetTransformInfo.h:234
#8  0x0000000001bad561 in ComputeSpeculationCost (TTI=..., I=0x3323158)
    at /home/bgl/work/llvm/lib/Transforms/Utils/SimplifyCFG.cpp:301
#9  SpeculativelyExecuteBB (BI=BI at entry=0x33230f8, ThenBB=0x3322f50, TTI=...)
    at /home/bgl/work/llvm/lib/Transforms/Utils/SimplifyCFG.cpp:1942
#10 0x0000000001bb53d2 in (anonymous
namespace)::SimplifyCFGOpt::SimplifyCondBranch (Builder=..., BI=0x33230f8,
this=0x7fffffffd1a0)
    at /home/bgl/work/llvm/lib/Transforms/Utils/SimplifyCFG.cpp:5804
#11 (anonymous namespace)::SimplifyCFGOpt::run (BB=0x3321020, 
    this=0x7fffffffd1a0)
    at /home/bgl/work/llvm/lib/Transforms/Utils/SimplifyCFG.cpp:5955
#12 llvm::SimplifyCFG (BB=0x3321020, TTI=..., 
    BonusInstThreshold=BonusInstThreshold at entry=1, AC=AC at entry=0x331d030, 
    LoopHeaders=LoopHeaders at entry=0x7fffffffd420, 
    LateSimplifyCFG=LateSimplifyCFG at entry=false)
    at /home/bgl/work/llvm/lib/Transforms/Utils/SimplifyCFG.cpp:5995
#13 0x0000000001a27d20 in iterativelySimplifyCFG (F=..., TTI=..., 
    AC=AC at entry=0x331d030, BonusInstThreshold=BonusInstThreshold at entry=1, 
    LateSimplifyCFG=LateSimplifyCFG at entry=false)
    at /home/bgl/work/llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp:149
#14 0x0000000001a27f20 in simplifyFunctionCFG (F=..., TTI=..., AC=0x331d030, 
    BonusInstThreshold=1, LateSimplifyCFG=<optimized out>)
    at /home/bgl/work/llvm/lib/Transforms/Scalar/SimplifyCFGPass.cpp:164
---Type <return> to continue, or q <return> to quit---
#15 0x000000000160db32 in llvm::FPPassManager::runOnFunction (this=0x346bff0, 
    F=...) at /home/bgl/work/llvm/lib/IR/LegacyPassManager.cpp:1514
#16 0x000000000160dc5e in llvm::legacy::FunctionPassManagerImpl::run (
    this=0x346bb30, F=...)
    at /home/bgl/work/llvm/lib/IR/LegacyPassManager.cpp:1463
#17 0x000000000160e166 in llvm::legacy::FunctionPassManager::run (
    this=this at entry=0x326fee0, F=...)
    at /home/bgl/work/llvm/lib/IR/LegacyPassManager.cpp:1387
#18 0x000000000069ad04 in main (argc=<optimized out>, argv=0x7fffffffdf68)
    at /home/bgl/work/llvm/tools/opt/opt.cpp:704
(gdb) up
#1  0x00000000009c2778 in
llvm::BasicTTIImplBase<llvm::ARMTTIImpl>::isLegalAddressingMode
(AddrSpace=<optimized out>, Scale=0, HasBaseReg=<optimized out>, 
    BaseOffset=0, BaseGV=0x3320ca8, Ty=<optimized out>, this=0x3428c58)
    at /home/bgl/work/llvm/include/llvm/CodeGen/BasicTTIImpl.h:119

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