[Bug target/51900] [4.6 Regression] const variable initialization always zero

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51900

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-19 11:57:18 UTC ---
(In reply to comment #3)
> [...]
> COLLECT_GCC_OPTIONS='-static' '-O2' '-v' '-Q' '-o' 'a.o' '-c' '-mtune=i386'
> '-march=i386'
> [...]
> GNU C (GCC) version 4.6.2 (mingw32)
>         compiled by GNU C version 4.6.2, GMP version 5.0.2, MPFR version 2.4.2,
> MPC version 0.9
> GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
> options passed:  -v
>  -iprefix d:\programme\msys\mingw462\bin\../lib/gcc/mingw32/4.6.2/ a.c
>  -mtune=i386 -march=i386 -auxbase-strip a.o -O2
> options enabled:  -falign-labels -fasynchronous-unwind-tables
>  -fauto-inc-dec -fbranch-count-reg -fcaller-saves
>  -fcombine-stack-adjustments -fcommon -fcompare-elim -fcprop-registers
>  -fcrossjumping -fcse-follow-jumps -fdefer-pop -fdelete-null-pointer-checks
>  -fdevirtualize -fdwarf2-cfi-asm -fearly-inlining
>  -feliminate-unused-debug-types -fexpensive-optimizations
>  -fforward-propagate -ffunction-cse -fgcse -fgcse-lm
>  -fguess-branch-probability -fident -fif-conversion -fif-conversion2
>  -findirect-inlining -finline -finline-functions-called-once
>  -finline-small-functions -fipa-cp -fipa-profile -fipa-pure-const
>  -fipa-reference -fipa-sra -fira-share-save-slots -fira-share-spill-slots
>  -fivopts -fkeep-inline-dllexport -fkeep-static-consts -fleading-underscore
>  -fmath-errno -fmerge-constants -fmerge-debug-strings
>  -fmove-loop-invariants -fomit-frame-pointer -foptimize-register-move
>  -foptimize-sibling-calls -fpartial-inlining -fpeephole -fpeephole2
>  -fprefetch-loop-arrays -freg-struct-return -fregmove -freorder-blocks
>  -freorder-functions -frerun-cse-after-loop -fsched-critical-path-heuristic
>  -fsched-dep-count-heuristic -fsched-group-heuristic -fsched-interblock
>  -fsched-last-insn-heuristic -fsched-rank-heuristic -fsched-spec
>  -fsched-spec-insn-heuristic -fsched-stalled-insns-dep
>  -fset-stack-executable -fshow-column -fsigned-zeros
>  -fsplit-ivs-in-unroller -fsplit-wide-types -fstrict-aliasing
>  -fstrict-overflow -fstrict-volatile-bitfields -fthread-jumps
>  -ftoplevel-reorder -ftrapping-math -ftree-bit-ccp -ftree-builtin-call-dce
>  -ftree-ccp -ftree-ch -ftree-copy-prop -ftree-copyrename -ftree-cselim
>  -ftree-dce -ftree-dominator-opts -ftree-dse -ftree-forwprop -ftree-fre
>  -ftree-loop-if-convert -ftree-loop-im -ftree-loop-ivcanon
>  -ftree-loop-optimize -ftree-parallelize-loops= -ftree-phiprop -ftree-pre
>  -ftree-pta -ftree-reassoc -ftree-scev-cprop -ftree-sink
>  -ftree-slp-vectorize -ftree-sra -ftree-switch-conversion -ftree-ter
>  -ftree-vect-loop-version -ftree-vrp -funit-at-a-time -funwind-tables
>  -fvar-tracking -fvar-tracking-assignments -fvect-cost-model
>  -fzero-initialized-in-bss -m32 -m80387 -m96bit-long-double
>  -maccumulate-outgoing-args -malign-double -malign-stringops
>  -mfancy-math-387 -mfp-ret-in-387 -mieee-fp -mno-red-zone -mno-sse4
>  -mpush-args -msahf -mstack-arg-probe
> [...]

I don't think that proves anything.  Please reproduce with explicit
-fcommon added.

That said, works for me on x86_64-linux.