------- Additional Comments From rth at gcc dot gnu dot org 2004-12-22 23:27 ------- Apparently register move costs.
Testing a Large Hack to prevent this suddenly appearing on the 3.4 branch. For mainline, move pattern constraints should be fixed, and folks will have to make sure to use -mno-sse when sse is not desired. Plus, -mno-sse will have to be fixed such that it's effective when -march implies sse[23], and we'll have to add extra code to not ICE on x86-64 when the ABI specifies that parameters go in disabled registers. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19102
