ARM regression between r223766 and r223925

[İsmail Dönmez]

A very simple hello world compilation crashes the compiler on ARMv7+neon

[~]> clang++ hello.cpp
clang-3.6: ../include/llvm/IR/Instructions.h:3177: llvm::BasicBlock
*llvm::InvokeInst::getSuccessor(unsigned int) const: Assertion `i < 2
&& "Successor # out of range for invoke!"' failed.
Stack dump:
0. Program arguments: /havana/dist/llvm/bin/clang-3.6 -cc1 -triple
armv7-unknown-linux-gnueabihf -emit-obj -mrelax-all -disable-free
-main-file-name hello.cpp -mrelocation-model static -mthread-model
posix -mdisable-fp-elim -fmath-errno -masm-verbose
-mconstructor-aliases -fuse-init-array -target-cpu cortex-a8
-target-abi aapcs-linux -mfloat-abi hard -dwarf-column-info
-resource-dir /havana/dist/llvm/bin/../lib/clang/3.6.0
-internal-isystem /havana/dist/llvm/bin/../include/c++/v1
-internal-isystem /usr/local/include -internal-isystem
/havana/dist/llvm/bin/../lib/clang/3.6.0/include
-internal-externc-isystem /usr/include/arm-linux-gnueabihf
-internal-externc-isystem /include -internal-externc-isystem
/usr/include -std=c++14 -fdeprecated-macro -fdebug-compilation-dir
/home/ismail -ferror-limit 19 -fmessage-length 127 -mstackrealign
-fno-signed-char -fobjc-runtime=gcc -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -o
/havana/tmp/hello-69a308.o -x c++ hello.cpp
1. <eof> parser at end of file
2. Code generation
3. Running pass 'Function Pass Manager' on module 'hello.cpp'.
4. Running pass 'ARM Instruction Selection' on function
'@_ZNSt3__14endlIcNS_11char_traitsIcEEEERNS_13basic_ostreamIT_T0_EES7_'
clang-3.6: error: unable to execute command: Aborted
clang-3.6: error: clang frontend command failed due to signal (use -v
to see invocation)
clang version 3.6.0 (trunk 223925)
Target: armv7l-unknown-linux-gnueabihf
Thread model: posix
clang-3.6: note: diagnostic msg: PLEASE submit a bug report to
http://llvm.org/bugs/ and include the crash backtrace, preprocessed
source, and associated run script.
clang-3.6: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang-3.6: note: diagnostic msg: /havana/tmp/hello-6f14b1.cpp
clang-3.6: note: diagnostic msg: /havana/tmp/hello-6f14b1.sh
clang-3.6: note: diagnostic msg:

********************

r223766 is OK.