------- Comment #21 from howarth at nitro dot med dot uc dot edu 2010-03-09 03:48 ------- Interestingly, I get...
gfortran -fgraphite-identity -O3 -Wstrict-overflow=5 -c spectop.f90 spectop.f90: In function spectop: spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 spectop.f90:5:0: warning: assuming signed overflow does not occur when reducing constant in comparison spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 spectop.f90:5:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 whereas without -fgraphite-identity, I get... gfortran -O3 -Wstrict-overflow=5 -c spectop.f90 spectop.f90: In function spectop: spectop.f90:23:0: warning: assuming signed overflow does not occur when changing X +- C1 cmp C2 to X cmp C1 +- C2 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42181
