new vararg test
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22252 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Feature/varargs_new.ll b/test/Feature/varargs_new.ll
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--- /dev/null
+++ b/test/Feature/varargs_new.ll
@@ -0,0 +1,33 @@
+; 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 ; Functions:
+declare void %llvm.va_start(sbyte**)
+declare void %llvm.va_copy(sbyte**, sbyte*)
+declare void %llvm.va_end(sbyte**)
+
+int %test(int %X, ...) {
+ ; Allocate two va_list items. On this target, va_list is of type sbyte*
+ %ap = alloca sbyte* ; <sbyte**> [#uses=4]
+ %aq = alloca sbyte* ; <sbyte**> [#uses=2]
+
+ ; Initialize variable argument processing
+ call void %llvm.va_start(sbyte** %ap)
+
+ ; Read a single integer argument
+ %tmp = vaarg sbyte** %ap, int ; <int> [#uses=1]
+
+ ; Demonstrate usage of llvm.va_copy and llvm_va_end
+ %apv = load sbyte** %ap ; <sbyte*> [#uses=1]
+ call void %llvm.va_copy(sbyte** %aq, sbyte* %apv)
+ call void %llvm.va_end(sbyte** %aq)
+
+ ; Stop processing of arguments.
+ call void %llvm.va_end(sbyte** %ap)
+ ret int %tmp
+
+}