Re: optimization/7887: [3.3 regression] Missing label with -O2 -fpic

Re: optimization/7887: [3.3 regression] Missing label with -O2 -fpic

[zlomek]

Synopsis: [3.3 regression] Missing label with -O2 -fpic

State-Changed-From-To: analyzed->closed
State-Changed-By: zlomek
State-Changed-When: Thu Feb 13 18:42:10 2003
State-Changed-Why:
    Bug fix has been checked in.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7887

Re: optimization/7887: [3.3 regression] Missing label with -O2 -fpic

[bangerth]

Old Synopsis: Undefined labels with -O2 -fpic breaks Mercury bootstrap
New Synopsis: [3.3 regression] Missing label with -O2 -fpic

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Fri Dec  6 12:49:04 2002
State-Changed-Why:
    Here's a much much simpler example:
    -----------------------------
    void foo(int * d11, int d22, int d33) {
        switch (d22 & 3) {
          case 0: {
            switch (d33) {
              case 0: *d11 = 1; break;
              case 1: *d11 = 1; break;
              case 2: *d11 = 1; break;
              case 3: *d11 = 1; break;
              case 4: *d11 = 1; break;
            }
            break;
          }
          case 1: {
            switch (d33) {
              case 0: *d11 = 1; break;
              case 1: *d11 = 1; break;
              case 2: *d11 = 1; break;
              case 3: *d11 = 1; break;
              case 4: *d11 = 1; break;
            }
          }
        }
    }
    
    int main() { return 0; }
    ----------------------------
    
    With present mainline I get on an x86-linux:
    tmp/g> /home/bangerth/bin/gcc-3.3-pre/bin/gcc -O2 -fpic bug.c
    /tmp/ccJZAgrn.o: In function `.L18':
    /tmp/ccJZAgrn.o(.text+0x45): undefined reference to `.L10'
    collect2: ld returned 1 exit status
    
    It worked with 2.95 and 3.2.2pre, so is a regression.
    
    I've seen a number of other reports about missing labels,
    maybe this is a related case.
    
    Regards
      Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7887