[Bug fortran/33074] New: [4.3 regression] ICE in copy_insn_1, at emit-rtl.c:4925

[fxcoudert at gcc dot gnu dot org]

The following testcase ICEs on x64_64-linux with -m32 -O:

$ cat u.f90
subroutine scaleg(a, w)
  real a(1), w(1)
  a(1) = 2.0**int(w(1))
end
$ gfortran -m32 -c u.f90 -O1
u.f90: In function ‘scaleg’:
u.f90:3: internal compiler error: in copy_insn_1, at emit-rtl.c:4925

The regression happened somewhere between revisions 127363 and 127489. It
doesn't feel like it is a front-end issue, but I haven't got a C testcase for
it :)

Backtrace:

#0  fancy_abort (file=0xb2ec10 "../../../trunk3/gcc/emit-rtl.c", line=4925, 
    function=0xb2f5cb "copy_insn_1") at ../../../trunk3/gcc/diagnostic.c:654
#1  0x0000000000545dec in copy_insn_1 (orig=0x2ab9aad71c30)
    at ../../../trunk3/gcc/emit-rtl.c:4925
#2  0x0000000000545e6e in copy_insn_1 (orig=0x2ab9aae68a20)
    at ../../../trunk3/gcc/emit-rtl.c:4897
#3  0x0000000000545e6e in copy_insn_1 (orig=0x2ab9aae68c80)
    at ../../../trunk3/gcc/emit-rtl.c:4897
#4  0x000000000067960f in eliminate_regs_in_insn (insn=0x2ab9aad71dc0, 
    replace=0) at ../../../trunk3/gcc/reload1.c:3363
#5  0x00000000006813ed in reload (first=0x2ab9aad767c0, global=1)
    at ../../../trunk3/gcc/reload1.c:1565
#6  0x0000000000a1f136 in rest_of_handle_global_alloc ()
    at ../../../trunk3/gcc/global.c:683
#7  0x00000000006391d9 in execute_one_pass (pass=0xde3b40)
    at ../../../trunk3/gcc/passes.c:1119
#8  0x00000000006393c0 in execute_pass_list (pass=0xde3b40)
    at ../../../trunk3/gcc/passes.c:1172
#9  0x00000000006393d5 in execute_pass_list (pass=0xddf3c0)
    at ../../../trunk3/gcc/passes.c:1173
#10 0x000000000070f99a in tree_rest_of_compilation (fndecl=0x2ab9aae61300)
    at ../../../trunk3/gcc/tree-optimize.c:405
#11 0x0000000000869940 in cgraph_expand_function (node=0x2ab9aae61500)
    at ../../../trunk3/gcc/cgraphunit.c:1077
#12 0x000000000086be2a in cgraph_optimize ()
    at ../../../trunk3/gcc/cgraphunit.c:1146


-- 
           Summary: [4.3 regression] ICE in copy_insn_1, at emit-rtl.c:4925
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fxcoudert at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33074