+; RUN: llc < %s -asm-verbose=false | FileCheck %s
+
+; Test varargs constructs.
+
+target datalayout = "e-p:32:32-i64:64-n32:64-S128"
+target triple = "wasm32-unknown-unknown"
+
+; Test va_start.
+
+; TODO: Test va_start.
+
+;define void @start(i8** %ap, ...) {
+;entry:
+; %0 = bitcast i8** %ap to i8*
+; call void @llvm.va_start(i8* %0)
+; ret void
+;}
+
+; Test va_end.
+
+; CHECK-LABEL: end:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: return{{$}}
+define void @end(i8** %ap) {
+entry:
+ %0 = bitcast i8** %ap to i8*
+ call void @llvm.va_end(i8* %0)
+ ret void
+}
+
+; Test va_copy.
+
+; CHECK-LABEL: copy:
+; CHECK-NEXT: .param i32, i32{{$}}
+; CHECK-NEXT: i32.load $push0=, $1{{$}}
+; CHECK-NEXT: i32.store $discard=, $0, $pop0{{$}}
+; CHECK-NEXT: return{{$}}
+define void @copy(i8** %ap, i8** %bp) {
+entry:
+ %0 = bitcast i8** %ap to i8*
+ %1 = bitcast i8** %bp to i8*
+ call void @llvm.va_copy(i8* %0, i8* %1)
+ ret void
+}
+
+; Test va_arg with an i8 argument.
+
+; CHECK-LABEL: arg_i8:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: .result i32{{$}}
+; CHECK-NEXT: .local i32{{$}}
+; CHECK-NEXT: i32.load $1=, $0{{$}}
+; CHECK-NEXT: i32.const $push0=, 4{{$}}
+; CHECK-NEXT: i32.add $push1=, $1, $pop0{{$}}
+; CHECK-NEXT: i32.store $discard=, $0, $pop1{{$}}
+; CHECK-NEXT: i32.load $push2=, $1{{$}}
+; CHECK-NEXT: return $pop2{{$}}
+define i8 @arg_i8(i8** %ap) {
+entry:
+ %t = va_arg i8** %ap, i8
+ ret i8 %t
+}
+
+; Test va_arg with an i32 argument.
+
+; CHECK-LABEL: arg_i32:
+; CHECK-NEXT: .param i32{{$}}
+; CHECK-NEXT: .result i32{{$}}
+; CHECK-NEXT: .local i32{{$}}
+; CHECK-NEXT: i32.load $push0=, $0{{$}}
+; CHECK-NEXT: i32.const $push1=, 3{{$}}
+; CHECK-NEXT: i32.add $push2=, $pop0, $pop1{{$}}
+; CHECK-NEXT: i32.const $push3=, -4{{$}}
+; CHECK-NEXT: i32.and $1=, $pop2, $pop3{{$}}
+; CHECK-NEXT: i32.const $push4=, 4{{$}}
+; CHECK-NEXT: i32.add $push5=, $1, $pop4{{$}}
+; CHECK-NEXT: i32.store $discard=, $0, $pop5{{$}}
+; CHECK-NEXT: i32.load $push6=, $1{{$}}
+; CHECK-NEXT: return $pop6{{$}}
+define i32 @arg_i32(i8** %ap) {
+entry:
+ %t = va_arg i8** %ap, i32
+ ret i32 %t
+}
+
+; Test va_arg with an i128 argument.
+
+; CHECK-LABEL: arg_i128:
+; CHECK-NEXT: .param i32, i32{{$}}
+; CHECK-NEXT: .local
+; CHECK: i32.and
+; CHECK: i64.load
+; CHECK: i64.load
+; CHECK: return{{$}}
+define i128 @arg_i128(i8** %ap) {
+entry:
+ %t = va_arg i8** %ap, i128
+ ret i128 %t
+}
+
+; Test a varargs call with no actual arguments.
+
+declare void @callee(...)
+
+; CHECK-LABEL: caller_none:
+; CHECK-NEXT: call callee{{$}}
+; CHECK-NEXT: return{{$}}
+define void @caller_none() {
+ call void (...) @callee()
+ ret void
+}
+
+; TODO: Test a varargs call with actual arguments.
+
+;define void @caller_some() {
+; call void (...) @callee(i32 0, double 2.0)
+; ret void
+;}
+
+declare void @llvm.va_start(i8*)
+declare void @llvm.va_end(i8*)
+declare void @llvm.va_copy(i8*, i8*)