[armel, fixed in 4.5] ICE in find_reloads, at reload.c in thumb mode

[Matthias Klose]

Binary package hint: gcc-4.4

seen with gcc-4.4 in lucid, not seen with -O1/-Os or -marm

$ g++ -O2 -c Execution.ii
/home/doko/tmp/llvm-2.7~svn20100203/lib/ExecutionEngine/Interpreter/Execution.cpp: In function 'llvm::GenericValue executeFCMP_OEQ(llvm::GenericValue, llvm::GenericValue, const llvm::Type*)':
/home/doko/tmp/llvm-2.7~svn20100203/lib/ExecutionEngine/Interpreter/Execution.cpp:299: error: unable to generate reloads for:
(insn 64 63 66 6 /home/doko/tmp/llvm-2.7~svn20100203/include/llvm/ADT/APInt.h:141 (set (subreg:SI (reg:DI 0 r0 [165]) 0)
        (ior:SI (ashift:SI (reg:SI 2 r2 [168])
                (const_int -31 [0xffffffffffffffe1]))
            (subreg:SI (reg:DI 0 r0 [165]) 0))) 670 {*thumb2_arith_shiftsi} (nil))
/home/doko/tmp/llvm-2.7~svn20100203/lib/ExecutionEngine/Interpreter/Execution.cpp:299: internal compiler error: in find_reloads, at reload.c:3781
Please submit a full bug report,
with preprocessed source if appropriate.

[Matthias Klose (doko)]

fix needs import from linaro

[Andrew Stubbs (ams-codesourcery)]

This may be fixed by Paul's patch that's due to go into gcc-linaro any time now.

[Michael Hope (michaelh1)]

Confirmed that gcc-linaro 4.4+bzr93543 no longer has an ICE using:
 http://ex.seabright.co.nz/build/gcc-linaro-4.4-93543/gcc-linaro-4.4-93543-armv7l-maverick-cbuild1-pavo1.tar.gz

[Michael Hope (michaelh1)]

fixed-in: 93542

[Michael Hope (michaelh1)]

Note that the ICE does not occur in gcc-linaro 4.5+bzr99310.

[Matthias Klose (doko)]

fixed 4.4_4.4.4-8ubuntu2