[Bug target/19102] [3.4 Regression] -march=pentium3 breaks linux kernel compiles w/ gcc-3_4-branch as of 2004/12/20

[rth at gcc dot gnu dot org]

------- 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.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19102