New test cases for bit accurate integers developed by Guoling Han.

[oota-llvm.git] / test / Integer / varargs_bt.ll

diff --git a/test/Integer/varargs_bt.ll b/test/Integer/varargs_bt.ll
new file mode 100644 (file)
index 0000000..0cc4d43
--- /dev/null
+++ b/test/Integer/varargs_bt.ll
@@ -0,0 +1,24 @@
+; RUN: llvm-as %s -o - | llvm-dis > %t1.ll; 
+; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
+; RUN: diff %t1.ll %t2.ll
+
+; Demonstrate all of the variable argument handling intrinsic functions plus 
+; the va_arg instruction.
+
+implementation
+declare void %llvm.va_start(i8** %ap)
+declare void %llvm.va_copy(i8** %aq, i8** %ap)
+declare void %llvm.va_end(i8** %ap)
+
+define i33 %test(i33 %X, ...) {
+        %ap = alloca i8*
+       call void %llvm.va_start(i8** %ap)
+       %tmp = va_arg i8** %ap, i33 
+
+        %aq = alloca i8*
+       call void %llvm.va_copy(i8** %aq, i8** %ap)
+       call void %llvm.va_end(i8** %aq)
+       
+       call void %llvm.va_end(i8** %ap)
+       ret i33 %tmp
+}