------- Comment #11 from howarth at nitro dot med dot uc dot edu 2008-06-23 14:54 ------- Any suggestions for debugging this further in gcc 4.3 branch? Currently we have the following observations...
1) The problem is specific to -fassociative-math -fno-signed-zeros -fno-trapping-math (-fno-signed-zeros -fno-trapping-math are required for -fassociative-math to be active) and happens with -O3 but not -O2. 2) The problem doesn't occur on powerpc-apple-darwin9. 3) The problem occurs on i686-apple-darwin9 at both -m32 and -m64. 4) -funroll-loops -param min-vect-loop-bound=2 suppresses the problem on Macintel (but is it just going latent as with r134730 on gcc trunk)? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36599
