On Thu, May 04, 2006 at 01:18:37PM -0700, Mark Mitchell wrote: > H. J. Lu wrote: > > > export BOOT_CFLAGS="-g -O2 -fsee" CXXFLAGS="-g -O2 -fsee" FCFLAGS="-g -O2 > > -fsee" GCJFLAGS="-g -O2 -fsee" SYSROOT_CFLAGS_FOR_TARGET="-g -O2 -fsee" > > # ..../configure > > # make BOOT_CFLAGS="-g -O2 -fsee" CXXFLAGS="-g -O2 -fsee" FCFLAGS="-g -O2 > > -fsee" GCJFLAGS="-g -O2 -fsee" SYSROOT_CFLAGS_FOR_TARGET="-g -O2 -fsee" > > > > to configure and build gcc on Linux/x86 and Linux/x86-64. > > That certainly does suggest a bug in the SEE patches. They needn't do > anything useful on IA32/AMD64, but they should presumably either (a) not > cause a bootstrap failure on these architectures, or (b) be disabled on > these architectures. >
FWIW, I am for SEE. But I think it can only be turned on with -O3 in a backend. If we want to turn it on with -O3 for all targets, we should 1. Use -fsee on gcc itself first: # export BOOT_CFLAGS="-g -O2 -fsee" CXXFLAGS="-g -O2 -fsee" FCFLAGS="-g -O2 -fsee" GCJFLAGS="-g -O2 -fsee" SYSROOT_CFLAGS_FOR_TARGET="-g -O2 -fsee" # ..../configure # make BOOT_CFLAGS="-g -O2 -fsee" CXXFLAGS="-g -O2 -fsee" FCFLAGS="-g -O2 -fsee" GCJFLAGS="-g -O2 -fsee" SYSROOT_CFLAGS_FOR_TARGET="-g -O2 -fsee" to make sure that there are no serious problems with SEE. 2. We have demonstrated that SEE helps on most major platforms. H.J.
