[llvm-bugs] [Bug 42640] New: mem2reg crashes: Assertion `I->getParent()->getParent() == Q.CxtI->getParent()->getParent() && "Got assumption for the wrong function!"' failed.
via llvm-bugs
llvm-bugs at lists.llvm.org
Tue Jul 16 09:40:35 PDT 2019
https://bugs.llvm.org/show_bug.cgi?id=42640
Bug ID: 42640
Summary: mem2reg crashes: Assertion
`I->getParent()->getParent() ==
Q.CxtI->getParent()->getParent() && "Got assumption
for the wrong function!"' failed.
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Transformation Utilities
Assignee: unassignedbugs at nondot.org
Reporter: cszide at 163.com
CC: llvm-bugs at lists.llvm.org
Created attachment 22252
--> https://bugs.llvm.org/attachment.cgi?id=22252&action=edit
.bc file of the source code
$clang -v
clang version 9.0.0 (trunk 363125)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.4.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64
$clang -O3 -c -emit-llvm -femit-all-decls -mllvm -disable-llvm-optzns small.c
$opt -gvn -loop-instsimplify -lowerswitch -simplifycfg -instcombine -reg2mem
-hotcoldsplit -mem2reg small.bc -o small-opt.bc
opt:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/lib/Analysis/ValueTracking.cpp:590:
void computeKnownBitsFromAssume(const llvm::Value*, llvm::KnownBits&, unsigned
int, const {anonymous}::Query&): Assertion `I->getParent()->getParent() ==
Q.CxtI->getParent()->getParent() && "Got assumption for the wrong function!"'
failed.
Stack dump:
0. Program arguments:
/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt -gvn
-loop-instsimplify -lowerswitch -simplifycfg -instcombine -reg2mem
-hotcoldsplit -mem2reg small.bc -o small-opt.bc
1. Running pass 'Function Pass Manager' on module 'small.bc'.
2. Running pass 'Promote Memory to Register' on function '@m'
#0 0x00005585bd8a387a llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x257887a)
#1 0x00005585bd8a1534 llvm::sys::RunSignalHandlers()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x2576534)
#2 0x00005585bd8a1672 SignalHandler(int)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x2576672)
#3 0x00007f7d60a92890 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x12890)
#4 0x00007f7d5f744e97 raise
/build/glibc-OTsEL5/glibc-2.27/signal/../sysdeps/unix/sysv/linux/raise.c:51:0
#5 0x00007f7d5f746801 abort /build/glibc-OTsEL5/glibc-2.27/stdlib/abort.c:81:0
#6 0x00007f7d5f73639a __assert_fail_base
/build/glibc-OTsEL5/glibc-2.27/assert/assert.c:89:0
#7 0x00007f7d5f736412 (/lib/x86_64-linux-gnu/libc.so.6+0x30412)
#8 0x00005585bcd3115e computeKnownBitsFromAssume(llvm::Value const*,
llvm::KnownBits&, unsigned int, (anonymous namespace)::Query const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1a0615e)
#9 0x00005585bcd31798 computeKnownBits(llvm::Value const*, llvm::KnownBits&,
unsigned int, (anonymous namespace)::Query const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1a06798)
#10 0x00005585bcd34f0a computeKnownBits(llvm::Value const*, unsigned int,
(anonymous namespace)::Query const&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1a09f0a)
#11 0x00005585bcd34fc4 llvm::computeKnownBits(llvm::Value const*,
llvm::DataLayout const&, unsigned int, llvm::AssumptionCache*,
llvm::Instruction const*, llvm::DominatorTree const*,
llvm::OptimizationRemarkEmitter*, bool)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1a09fc4)
#12 0x00005585bcbc6169 llvm::SimplifyInstruction(llvm::Instruction*,
llvm::SimplifyQuery const&, llvm::OptimizationRemarkEmitter*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x189b169)
#13 0x00005585bd9943be (anonymous namespace)::PromoteMem2Reg::run()
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x26693be)
#14 0x00005585bd99646a llvm::PromoteMemToReg(llvm::ArrayRef<llvm::AllocaInst*>,
llvm::DominatorTree&, llvm::AssumptionCache*)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x266b46a)
#15 0x00005585bd97c41f promoteMemoryToRegister(llvm::Function&,
llvm::DominatorTree&, llvm::AssumptionCache&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x265141f)
#16 0x00005585bd25c189 llvm::FPPassManager::runOnFunction(llvm::Function&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f31189)
#17 0x00005585bd25c281 llvm::FPPassManager::runOnModule(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f31281)
#18 0x00005585bd25b3e1 llvm::legacy::PassManagerImpl::run(llvm::Module&)
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x1f303e1)
#19 0x00005585bbb440a9 main
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x8190a9)
#20 0x00007f7d5f727b97 __libc_start_main
/build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0
#21 0x00005585bbbc93fa _start
(/home/jack-zhou/Documents/llvm/llvm_truck/llvm2/build1/bin/opt+0x89e3fa)
Aborted (core dumped)
-------------------------------------------------------------------
long(a);
int b, c, d, e, f, g;
short h;
unsigned *i;
char *j;
void(k)();
int(l)();
void m() {
unsigned **n = &i;
int o, p = l(), q;
*j = g;
k();
int *r[] = {&q, &b, &d, &d, &e, &d, &d, &d, &e, &p, &o, &c, &d};
if (n == 0)
for (;;) {
unsigned int s;
for (;; h++) {
int t;
if (f)
break;
}
*n = &s;
if (a)
break;
}
}
--
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