1; RUN: llc < %s -mtriple=armv7-none-linux-gnueabi | FileCheck %s
2; Test that we correctly use registers and align elements when using va_arg
3
4%struct_t = type { double, double, double }
5@static_val = constant %struct_t { double 1.0, double 2.0, double 3.0 }
6
7declare void @llvm.va_start(i8*) nounwind
8declare void @llvm.va_end(i8*) nounwind
9
10; CHECK-LABEL: test_byval_8_bytes_alignment:
11define void @test_byval_8_bytes_alignment(i32 %i, ...) {
12entry:
13; CHECK: stm     r0, {r1, r2, r3}
14  %g = alloca i8*
15  %g1 = bitcast i8** %g to i8*
16  call void @llvm.va_start(i8* %g1)
17
18; CHECK: add	[[REG:(r[0-9]+)|(lr)]], {{(r[0-9]+)|(lr)}}, #7
19; CHECK: bfc	[[REG]], #0, #3
20  %0 = va_arg i8** %g, double
21  call void @llvm.va_end(i8* %g1)
22
23  ret void
24}
25
26; CHECK-LABEL: main:
27; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val
28; CHECK: movt [[BASE]], :upper16:static_val
29; ldm is not formed when the coalescer failed to coalesce everything.
30; CHECK: ldrd    r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}}
31; CHECK: movw r0, #555
32define i32 @main() {
33entry:
34  call void (i32, ...)* @test_byval_8_bytes_alignment(i32 555, %struct_t* byval @static_val)
35  ret i32 0
36}
37
38declare void @f(double);
39
40; CHECK-LABEL:     test_byval_8_bytes_alignment_fixed_arg:
41; CHECK-NOT:   str     r1
42; CHECK:       str     r3, [sp, #12]
43; CHECK:       str     r2, [sp, #8]
44; CHECK-NOT:   str     r1
45define void @test_byval_8_bytes_alignment_fixed_arg(i32 %n1, %struct_t* byval %val) nounwind {
46entry:
47  %a = getelementptr inbounds %struct_t* %val, i32 0, i32 0
48  %0 = load double* %a
49  call void (double)* @f(double %0)
50  ret void
51}
52
53; CHECK-LABEL: main_fixed_arg:
54; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val
55; CHECK: movt [[BASE]], :upper16:static_val
56; ldm is not formed when the coalescer failed to coalesce everything.
57; CHECK: ldrd     r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}}
58; CHECK: movw r0, #555
59define i32 @main_fixed_arg() {
60entry:
61  call void (i32, %struct_t*)* @test_byval_8_bytes_alignment_fixed_arg(i32 555, %struct_t* byval @static_val)
62  ret i32 0
63}
64