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: sub       sp, sp, #12
14; CHECK: sub       sp, sp, #4
15; CHECK: add       r0, sp, #4
16; CHECK: stmib     sp, {r1, r2, r3}
17  %g = alloca i8*
18  %g1 = bitcast i8** %g to i8*
19  call void @llvm.va_start(i8* %g1)
20
21; CHECK: add	[[REG:(r[0-9]+)|(lr)]], {{(r[0-9]+)|(lr)}}, #7
22; CHECK: bic	[[REG]], [[REG]], #7
23  %0 = va_arg i8** %g, double
24  call void @llvm.va_end(i8* %g1)
25
26  ret void
27}
28
29; CHECK-LABEL: main:
30; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val
31; CHECK: movt [[BASE]], :upper16:static_val
32; ldm is not formed when the coalescer failed to coalesce everything.
33; CHECK: ldrd    r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}}
34; CHECK: movw r0, #555
35define i32 @main() {
36entry:
37  call void (i32, ...) @test_byval_8_bytes_alignment(i32 555, %struct_t* byval @static_val)
38  ret i32 0
39}
40
41declare void @f(double);
42
43; CHECK-LABEL:     test_byval_8_bytes_alignment_fixed_arg:
44; CHECK-NOT:   str     r1
45; CHECK:       str     r3, [sp, #12]
46; CHECK:       str     r2, [sp, #8]
47; CHECK-NOT:   str     r1
48define void @test_byval_8_bytes_alignment_fixed_arg(i32 %n1, %struct_t* byval %val) nounwind {
49entry:
50  %a = getelementptr inbounds %struct_t, %struct_t* %val, i32 0, i32 0
51  %0 = load double, double* %a
52  call void (double) @f(double %0)
53  ret void
54}
55
56; CHECK-LABEL: main_fixed_arg:
57; CHECK: movw [[BASE:r[0-9]+]], :lower16:static_val
58; CHECK: movt [[BASE]], :upper16:static_val
59; ldm is not formed when the coalescer failed to coalesce everything.
60; CHECK: ldrd     r2, [[TMP:r[0-9]+]], {{\[}}[[BASE]]{{\]}}
61; CHECK: movw r0, #555
62define i32 @main_fixed_arg() {
63entry:
64  call void (i32, %struct_t*) @test_byval_8_bytes_alignment_fixed_arg(i32 555, %struct_t* byval @static_val)
65  ret i32 0
66}
67