[ARM] Regression between r215896 and r215960

[İsmail Dönmez]

Hi,

To reproduce, get http://www.cs.utah.edu/~aek/code/card.cpp and

[~]> clang++ -O1 card.cpp -o card
clang-3.6: ../lib/Support/IntervalMap.cpp:138: IdxPair
llvm::IntervalMapImpl::distribute(unsigned int, unsigned int, unsigned int,
const unsigned int *, unsigned int *, unsigned int, bool): Assertion `Sum
== Elements + Grow && "Bad distribution sum"' failed.
Stack dump:
0.      Program arguments: /havana/dist/llvm/bin/clang-3.6 -cc1 -triple
armv7-unknown-linux-gnueabihf -emit-obj -disable-free -main-file-name
card.cpp -mrelocation-model static -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
/usr/lib/gcc/arm-linux-gnueabihf/4.9/../../../../include/c++/4.9
-internal-isystem
/usr/lib/gcc/arm-linux-gnueabihf/4.9/../../../../include/c++/4.9/arm-linux-gnueabihf
-internal-isystem
/usr/lib/gcc/arm-linux-gnueabihf/4.9/../../../../include/c++/4.9/backward
-internal-isystem
/usr/lib/gcc/arm-linux-gnueabihf/4.9/../../../../include/arm-linux-gnueabihf/c++/4.9
-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 -O1 -fdeprecated-macro
-fdebug-compilation-dir /home/ismail -ferror-limit 19 -fmessage-length 104
-mstackrealign -fno-signed-char -fobjc-runtime=gcc -fcxx-exceptions
-fexceptions -fdiagnostics-show-option -fcolor-diagnostics -o
/havana/tmp/card-13c953.o -x c++ card.cpp
1.      <eof> parser at end of file
2.      Code generation
3.      Running pass 'Function Pass Manager' on module 'card.cpp'.
4.      Running pass 'Greedy Register Allocator' on function
'@_Z1T1vS_RfRS_'
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 (215976)
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/card-e32b8e.cpp
clang-3.6: note: diagnostic msg: /havana/tmp/card-e32b8e.sh
clang-3.6: note: diagnostic msg:

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

This is on a native ARMv7 host (BeagleBone Black) and r215896 works fine.
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