decl: Allow alignment > 16 of locals

This is not yet supported by QBE, so for now we allocate a bit extra
and choose the address in the allocated region with an aligned
address.

2 files changed, 15 insertions, 0 deletions

diff --git a/test/alignas-local-32.c b/test/alignas-local-32.c
new file mode 100644
index 0000000..e69a105
--- /dev/null
+++ b/test/alignas-local-32.c
@@ -0,0 +1,4 @@
+int main(void) {
+	_Alignas(32) char x;
+	return (unsigned long)&x % 32;
+}
diff --git a/test/alignas-local-32.qbe b/test/alignas-local-32.qbe
new file mode 100644
index 0000000..53bfab3
--- /dev/null
+++ b/test/alignas-local-32.qbe
@@ -0,0 +1,11 @@
+export
+function w $main() {
+@start.1
+	%.1 =l alloc16 17
+	%.2 =l add %.1, 16
+	%.3 =l and %.2, 18446744073709551584
+@body.2
+	%.4 =l extsw 32
+	%.5 =l urem %.3, %.4
+	ret %.5
+}