regalloc+emit: get rid of xsave/xrestore hack

Was used for situation where we needed to spill more than 1 temporary
and have to use a register that is already used. Instead of push/pop, we
can just allocate and set aside specific stack slots for this purpose.
Also, reworked linearscan() interval sets to separate FPR/GPR intervals.

1 files changed, 0 insertions, 2 deletions

diff --git a/ir/op.def b/ir/op.def
index 947b1f0..2476ecf 100644
--- a/ir/op.def
+++ b/ir/op.def
@@ -72,5 +72,3 @@ _(vastart,   1)
 _(vaarg,     2)
 /* machine-specific instructions */
 _(xvaprologue, 1)
-_(xsave,     1)
-_(xrestore,  1)