ARM: Fix passing arrays to varadic functions

TinyCC miscompiled

void g(int,...);

void f(void)
{
        char b[4000];
        g(1, 2, 3, 4, b);
}

in two ways:
 1. It didn't align the stack to 8 bytes before the call
 2. It added sizeof(b) to the stack pointer after the call

1 files changed, 3 insertions, 1 deletions

diff --git a/arm-gen.c b/arm-gen.c
index 1ee008f..a9c05fe 100644
--- a/arm-gen.c
+++ b/arm-gen.c
@@ -959,7 +959,9 @@ static int assign_regs(int nb_args, int float_abi, struct plan *plan, int *todo)
   memset(plan->clsplans, 0, sizeof(plan->clsplans));
   for(i = nb_args; i-- ;) {
     int j, start_vfpreg = 0;
-    size = type_size(&vtop[-i].type, &align);
+    CType type = vtop[-i].type;
+    type.t &= ~VT_ARRAY;
+    size = type_size(&type, &align);
     size = (size + 3) & ~3;
     align = (align + 3) & ~3;
     switch(vtop[-i].type.t & VT_BTYPE) {