Re: optimization/9331: ICE in final_scan_finsn

[bangerth@dealii.org]

Old Synopsis: g++ 3.2 gives ice on optimizing a VTK source file - SSE releated
New Synopsis: ICE in final_scan_finsn

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Wed Jan 15 11:30:16 2003
State-Changed-Why:
    Confirmed. Here's a much reduced testcase:
    ----------------------------
    void foo() {
      float trueValue;
      float* outSI;
    
      if (*outSI)
        *outSI = trueValue;
      else
        *outSI = 0;
    }
    ----------------------------
    It crashed the C and C++ front ends of 3.2/3/4 branches
    alike:
    
    g/a> /home/bangerth/bin/gcc-3.4-pre/bin/gcc -march=pentium3 -O -c x.c
    x.c: In function `foo':
    x.c:9: error: could not split insn
    (insn 34 11 35 0x4001839c (set (reg:SF 21 exmm0 [62])
            (if_then_else:SF (ne (mem:SF (reg/v/f:SI 0 eax [59]) [0 S4 A32])
                    (reg:SF 21 exmm0 [61]))
                (reg/v:SF 22 exmm1 [58])
                (const_double:SF 0 [0x0] 0.0 [0x0.0p+0]))) 495 {*sse_movsfcc_const0_3} (insn_list 11 (nil))
        (expr_list:REG_DEAD (reg/v:SF 22 exmm1 [58])
            (expr_list:REG_EQUIV (mem:SF (reg/v/f:SI 0 eax [59]) [0 S4 A32])
                (nil))))
    x.c:9: internal compiler error: in final_scan_insn, at final.c:2495
    Please submit a full bug report,
    with preprocessed source if appropriate.
    See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
    
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9331