https://llvm.org/bugs/show_bug.cgi?id=25256
Bug ID: 25256
Summary: PowerPC: CTR register loop optimization fails with PIC
Product: new-bugs
Version: 3.7
Hardware: Other
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: unassignedb...@nondot.org
Reporter: eric.schwe...@pgroup.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 15117
--> https://llvm.org/bugs/attachment.cgi?id=15117&action=edit
reduced_fn.ll
The reduced LL file is attached. Host machine is a POWER8.
% llc reduced_fn.ll -o ./vm08.s -mcpu=native -O2 -relocation-model=pic
Invalid PPC CTR loop!
UNREACHABLE executed at
/proj/scratch/eschweitz/git/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp:676!
#0 0x10de5878 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/proj/scratch/eschweitz/llvm/3.7ppc/bin/llc+0x10de5878)
#1 0x10de69a0 (/proj/scratch/eschweitz/llvm/3.7ppc/bin/llc+0x10de69a0)
#2 0x10de6d98 (/proj/scratch/eschweitz/llvm/3.7ppc/bin/llc+0x10de6d98)
0 llc 0x0000000010de5878 llvm::sys::PrintStackTrace(llvm::raw_ostream&)
+ 120
1 llc 0x0000000010de69a0
2 llc 0x0000000010de6d98
3 0x0000100000040478 __kernel_sigtramp_rt64 + 0
4 libc.so.6 0x0000100000400a88 gsignal + 72
5 libc.so.6 0x000010000040693c abort + 620
6 llc 0x0000000010dcaae0 llvm::llvm_unreachable_internal(char const*,
char const*, unsigned int) + 688
7 llc 0x000000001031f1d4
8 llc 0x00000000106e8e88
llvm::MachineFunctionPass::runOnFunction(llvm::Function&) + 216
9 llc 0x0000000010c9de64
llvm::FPPassManager::runOnFunction(llvm::Function&) + 804
10 llc 0x0000000010c9e20c llvm::FPPassManager::runOnModule(llvm::Module&)
+ 76
11 llc 0x0000000010c9ea18
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 1320
12 llc 0x0000000010c9f1fc llvm::legacy::PassManager::run(llvm::Module&) +
28
13 llc 0x00000000101289f8 main + 9208
14 libc.so.6 0x00001000003e4d00
15 libc.so.6 0x00001000003e4ef8 __libc_start_main + 200
Stack dump:
0. Program arguments: llc reduced_fn.ll -o ./vm08.s -mcpu=native -O2
-relocation-model=pic
1. Running pass 'Function Pass Manager' on module 'reduced_fn.ll'.
2. Running pass 'PowerPC CTR Loops Verify' on function '@z000c'
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