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Bug#642127: ICE: g++-4.6: ICE on armhf with llvm-2.x

Package: gfortran-4.6
Version: 4.6.1-10
Severity: important

llvm-2.x fail to build from source on armhf, all due to a g++ ICE:

http://buildd.debian-ports.org/status/fetch.php?pkg=llvm-2.7&arch=armhf&ver=2.7-6.2&stamp=1311446819
http://buildd.debian-ports.org/status/fetch.php?pkg=llvm-2.8&arch=armhf&ver=2.8-7&stamp=1309205992
http://buildd.debian-ports.org/status/fetch.php?pkg=llvm-2.9&arch=armhf&ver=2.9%2Bdfsg-3&stamp=1309210849

...
llvm[4]: Compiling ExternalFunctions.cpp for Release build
if arm-linux-gnueabihf-g++
-I/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/include
-I/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter
-I/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/include
-I/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/lib/ExecutionEngine/Interpreter
 -DNDEBUG -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS
-g -O2 -fomit-frame-pointer -fno-exceptions -fPIC -Woverloaded-virtual
-Wcast-qual    -pedantic -Wno-long-long -Wall -W -Wno-unused-parameter
-Wwrite-strings  -c -MMD -MP -MF
"/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunctions.d.tmp"
-MT "/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunctions.o"
-MT "/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunc
 tions.d" /build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp
-o /build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunctions.o
; \
	        then /bin/mv -f
"/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunctions.d.tmp"
"/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunctions.d";
else /bin/rm "/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/build-llvm/lib/ExecutionEngine/Interpreter/Release/ExternalFunctions.d.tmp";
exit 1; fi
/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp:
In member function 'llvm::GenericValue
llvm::Interpreter::callExternalFunction(llvm::Function*, const
std::vector<llvm::GenericValue>&)':
/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp:293:1:
error: insn does not satisfy its constraints:
(insn 3133 3132 3135 306 (set (subreg:SI (reg:DI 1122) 0)
        (ior:SI (ashift:SI (reg:SI 1125)
                (const_int -24 [0xffffffffffffffe8]))
            (subreg:SI (reg:DI 1122) 0)))
/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/include/llvm/ADT/APInt.h:139
251 {*arith_shiftsi}
     (nil))
/build/buildd-llvm-2.8_2.8-7-armhf-yLsjcC/llvm-2.8-2.8/lib/ExecutionEngine/Interpreter/ExternalFunctions.cpp:293:1:
internal compiler error: in extract_constrain_insn_cached, at
recog.c:2024
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.6/README.Bugs> for instructions.

I used the delta package to produce a minimal testcase for the ICE
which I attach.
You can reproduce the ICE with:

g++ -O2 -fpermissive -w llvm_ExternalFunctions-min.i

Thanks

Konstantinos

Attachment: llvm_ExternalFunctions-min.i
Description: Binary data

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