fix various codegen bugs on arm64

- dynamic allocations could generate
  bad 'and' instructions (for the
  and with -16 in salloc()).
- symbols used in w context would
  generate adrp and add instructions
  on wN registers while they seem to
  only work on xN registers.

Thanks to Rosie for reporting them.

1 files changed, 16 insertions, 0 deletions

diff --git a/test/isel5.ssa b/test/isel5.ssa
new file mode 100644
index 0000000..9c546d7
--- /dev/null
+++ b/test/isel5.ssa
@@ -0,0 +1,16 @@
+# make sure the local symbols used for
+# fp constants do not get a _ prefix
+# on apple arm hardware
+
+export function w $main() {
+@start
+	%r =d copy d_1.2
+	%x =w call $printf(l $fmt, ..., d %r)
+	ret 0
+}
+
+data $fmt = { b "%.06f\n", b 0 }
+
+# >>> output
+# 1.200000
+# <<<