Check in LLVM r95781.

1 files changed, 38 insertions, 0 deletions

diff --git a/test/Feature/varargs_new.ll b/test/Feature/varargs_new.ll
new file mode 100644
index 0000000..a46f270
--- /dev/null
+++ b/test/Feature/varargs_new.ll
@@ -0,0 +1,38 @@
+; RUN: llvm-as < %s | 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.
+
+declare void @llvm.va_start(i8*)
+
+declare void @llvm.va_copy(i8*, i8*)
+
+declare void @llvm.va_end(i8*)
+
+define i32 @test(i32 %X, ...) {
+        ; Allocate two va_list items.  On this target, va_list is of type sbyte*
+        %ap = alloca i8*                ; <i8**> [#uses=4]
+        %aq = alloca i8*                ; <i8**> [#uses=2]
+
+        ; Initialize variable argument processing
+        %va.upgrd.1 = bitcast i8** %ap to i8*           ; <i8*> [#uses=1]
+        call void @llvm.va_start( i8* %va.upgrd.1 )
+
+        ; Read a single integer argument
+        %tmp = va_arg i8** %ap, i32             ; <i32> [#uses=1]
+
+        ; Demonstrate usage of llvm.va_copy and llvm_va_end
+        %apv = load i8** %ap            ; <i8*> [#uses=1]
+        %va0.upgrd.2 = bitcast i8** %aq to i8*          ; <i8*> [#uses=1]
+        %va1.upgrd.3 = bitcast i8* %apv to i8*          ; <i8*> [#uses=1]
+        call void @llvm.va_copy( i8* %va0.upgrd.2, i8* %va1.upgrd.3 )
+        %va.upgrd.4 = bitcast i8** %aq to i8*           ; <i8*> [#uses=1]
+        call void @llvm.va_end( i8* %va.upgrd.4 )
+
+        ; Stop processing of arguments.
+        %va.upgrd.5 = bitcast i8** %ap to i8*           ; <i8*> [#uses=1]
+        call void @llvm.va_end( i8* %va.upgrd.5 )
+        ret i32 %tmp
+}