Re: target/9068: [3.4 regression] [x86] comisd & comiss constraints are incorrect

[bangerth at dealii dot org]

Old Synopsis: [x86] comisd & comiss intel-syntax constraints are incorrect
New Synopsis: [3.4 regression] [x86] comisd & comiss constraints are incorrect

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Fri Jan 10 16:32:10 2003
State-Changed-Why:
    Confirmed. This also happens on x86-linux, and has nothing
    to do with intel asm syntax, since I can reproduce it
    with this smaller testcase
    ----------------------------------
    int foo(int count, double sum) {
        return (sum/count > 0.0000001);
    }
    --------------------------------
    and the following (shorter) command line:
      tmp/g> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -msse2 x.c
      x.c: In function `int foo(int, double)':
      x.c:3: internal compiler error: in get_attr_length_immediate, at insn-attrtab.c
       :22751
      Please submit a full bug report,
    
    This is a regression w.r.t. 3.3, where things worked, 
    although probably more by chance.
    Jan, you are the author of the hunk of code that the patch
    in this report touches. Can you comment on its validity?
    
    Thinking more about it, the original report probably
    was about this code (which indeed fails only with intel
    asm syntax):
    -----------------------------
    int foo(double sum) {
        return (sum > 0.0000001);
    }
    -------------------------------
    tmp/g> /home/bangerth/bin/gcc-3.4-pre/bin/c++ -msse2 -Wall -march=pentium4 -ffast-math -mfpmath=sse -masm=intel x.c
    x.c: In function `int foo(double)':
    x.c:3: internal compiler error: output_operand: operand number missing after
       %-letter
    Please submit a full bug report,
    
    
    So it seems as if these were two reports in one. The latter
    example, however, never worked as long as SSE support is
    present, which is not surprising since the code the patch
    in this report touches is unchanged since the first SSE
    patch to i386.c
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9068