[Bug tree-optimization/27105] New: ICE with -O3 -ftree-loop-linear

["micis at gmx dot de" <gcc-bugzilla at gcc dot gnu dot org>]

I tried the last (gcc-4.2-20060408) snapshot.
When I compile the preprocessed source t.ii the compiler segfaults.
/usr/local/gcc42h/bin/g++42h -O3 -ftree-loop-linear -S t.ii

g++42h -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.2-20060408/configure --prefix=/usr/local/gcc42h
 --program-suffix=42h --with-arch=opteron --enable-languages=c,c++
 --enable-__cxa_atexit --disable-nls --enable-threads=posix
 --disable-multilib --enable-checking
Thread model: posix
gcc version 4.2.0 20060408 (experimental)

using gdb I got this call stack:
#0  is_gimple_min_invariant (t=0x0) at
../../gcc-4.2-20060408/gcc/tree-gimple.c:172
#1  0x00000000005df0d8 in expr_invariant_in_loop_p (loop=0x1315790, expr=0x0)
at ../../gcc-4.2-20060408/gcc/tree-ssa-loop-ivopts.c:1303
#2  0x00000000005df15e in expr_invariant_in_loop_p (loop=0x1315790,
expr=0x2a99c12690) at ../../gcc-4.2-20060408/gcc/tree-ssa-loop-ivopts.c:1321
#3  0x00000000005df15e in expr_invariant_in_loop_p (loop=0x1315790,
expr=0x2a99c12620) at ../../gcc-4.2-20060408/gcc/tree-ssa-loop-ivopts.c:1321
#4  0x00000000005df15e in expr_invariant_in_loop_p (loop=0x1315790,
expr=0x2a9ba1b300) at ../../gcc-4.2-20060408/gcc/tree-ssa-loop-ivopts.c:1321
#5  0x0000000000989e65 in can_put_in_inner_loop (inner=0x1315790,
stmt=0x2a9e90c780) at ../../gcc-4.2-20060408/gcc/lambda-code.c:2175
#6  0x000000000098b3d8 in can_convert_to_perfect_nest (loop=0x13156d0,
loopivs=0x11eced0) at ../../gcc-4.2-20060408/gcc/lambda-code.c:2268
#7  0x000000000098b7d6 in perfect_nestify (loops=0xed7470, loop=0x13156d0,
lbounds=0x12a8310, ubounds=0x12c5f20, steps=0x12b9760, loopivs=0x11eced0)
    at ../../gcc-4.2-20060408/gcc/lambda-code.c:2362
#8  0x000000000098d276 in gcc_loopnest_to_lambda_loopnest (currloops=0xed7470,
loop_nest=0x13156d0, inductionvars=0x7fbfffe258, invariants=0x7fbfffe250,
need_perfect_nest=1 '\001')
    at ../../gcc-4.2-20060408/gcc/lambda-code.c:1494
#9  0x0000000000889277 in linear_transform_loops (loops=0xed7470) at
../../gcc-4.2-20060408/gcc/tree-loop-linear.c:322
#10 0x00000000005b7345 in tree_linear_transform () at
../../gcc-4.2-20060408/gcc/tree-ssa-loop.c:228
#11 0x00000000008843bb in execute_one_pass (pass=0xc5f660) at
../../gcc-4.2-20060408/gcc/passes.c:863
#12 0x000000000088452c in execute_pass_list (pass=0xc5f660) at
../../gcc-4.2-20060408/gcc/passes.c:910
#13 0x000000000088453e in execute_pass_list (pass=0xc5f480) at
../../gcc-4.2-20060408/gcc/passes.c:911
#14 0x000000000088453e in execute_pass_list (pass=0xc5eac0) at
../../gcc-4.2-20060408/gcc/passes.c:911
#15 0x000000000055c047 in tree_rest_of_compilation (fndecl=0x2a966e3000) at
../../gcc-4.2-20060408/gcc/tree-optimize.c:418
#16 0x00000000004d2aa8 in expand_body (fn=0x2a966e3000) at
../../gcc-4.2-20060408/gcc/cp/semantics.c:3012
#17 0x00000000008d34c6 in cgraph_expand_function (node=0x2a9b2596c0) at
../../gcc-4.2-20060408/gcc/cgraphunit.c:1102
#18 0x00000000008d5bbe in cgraph_optimize () at
../../gcc-4.2-20060408/gcc/cgraphunit.c:1167
#19 0x000000000047f635 in cp_finish_file () at
../../gcc-4.2-20060408/gcc/cp/decl2.c:3147
#20 0x000000000053140a in c_common_parse_file (set_yydebug=Variable
"set_yydebug" is not available.
) at ../../gcc-4.2-20060408/gcc/c-opts.c:1165
#21 0x0000000000855ce8 in toplev_main (argc=Variable "argc" is not available.

I tried to delta-debug but after removing the preprocessor comments I got:
internal compiler error: verify_cgraph_node failed

So I decided to attach the original preprocessed source.

Michael Cieslinski


-- 
           Summary: ICE with -O3 -ftree-loop-linear
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: micis at gmx dot de
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27105