shithub: mc

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Don't allocate as many registers.

    We were allocating physical regs every time we entered selexpr().
    We don't need to do that.

--- a/8/regalloc.c

+++ b/8/regalloc.c

@@ -72,7 +72,7 @@

 Loc *locreg(Mode m)

 {

     Loc *l;

-    static long nextpseudo;

+    static long nextpseudo = 0;

     l = zalloc(sizeof(Loc));

     l->type = Locreg;

@@ -83,11 +83,13 @@

 Loc *locphysreg(Reg r)

 {

-    Loc *l;

+    static Loc *physregs[Nreg] = {0,};

-    l = locreg(regmodes[r]);

-    l->reg.colour = r;

-    return l;

+    if (physregs[r])

+        return physregs[r];

+    physregs[r] = locreg(regmodes[r]);

+    physregs[r]->reg.colour = r;

+    return physregs[r];

 }

 Loc *locmem(long disp, Loc *base, Loc *idx, Mode mode)