x86_64: for vararg calls, write to EAX in isel

Also, in regalloc ensure fixed intervals are sorted

1 files changed, 0 insertions, 10 deletions

diff --git a/x86_64/emit.c b/x86_64/emit.c
index 13121b3..89585b8 100644
--- a/x86_64/emit.c
+++ b/x86_64/emit.c
@@ -1171,16 +1171,6 @@ emitinstr(uchar **pcode, struct function *fn, struct block *blk, int curi, struc
       Xpop(pcode, mkregoper(ins->l).reg);
       break;
    case Ocall:
-      if (calltab.p[ins->r.i].vararg >= 0) {
-         struct call *call = &calltab.p[ins->r.i];
-         /* variadic functions need the caller to write num of args in sse regs to %al */
-         int n = 0;
-         for (int i = 0; i < call->narg; ++i)
-            if (!call->abiarg[i].isstk && call->abiarg[i].reg >= XMM0)
-               ++n;
-         if (!n) DS("\x31\xC0"); /* XOR EAX, EAX */
-         else B(0xB0), B(n); /* MOV AL, n */
-      }
       Xcall(pcode, KPTR, ref2oper(ins->l));
       break;
    case Oxvaprologue: