// #target: macos-x64
module foo;
import libc;

struct Matrix2x2
{
	union
	{
		struct {
			float m00, m01, m10, m11;
		}
		float[4] m;
	}
}

struct Matrix2x2_b
{
	union
	{
		float[4] m;
		struct {
			float m00, m01, m10, m11;
		}
	}
}

fn void main()
{
	Matrix2x2 m = { 1, 2, 3, 4 };
	Matrix2x2_b m2 = { { 1, 2, 3, 4 } };
	libc::printf("%f %f %f %f\n", m.m00, m.m[1], m.m10, m.m[3]);
}
/* #expect: foo.ll

%Matrix2x2 = type { %anon }
%anon = type { %anon.0 }
%anon.0 = type { float, float, float, float }
%Matrix2x2_b = type { %anon.1 }
%anon.1 = type { [4 x float] }

@"ct$foo_anon" = linkonce constant %.introspect { i8 10, i64 16, i64 0, i64 4, [0 x i64] zeroinitializer }, align 8
@"ct$foo_anon.3" = linkonce constant %.introspect { i8 11, i64 16, i64 0, i64 2, [0 x i64] zeroinitializer }, align 8
@"ct$foo_Matrix2x2" = linkonce constant %.introspect { i8 10, i64 16, i64 0, i64 1, [0 x i64] zeroinitializer }, align 8
@"ct$foo_anon.6" = linkonce constant %.introspect { i8 10, i64 16, i64 0, i64 4, [0 x i64] zeroinitializer }, align 8
@"ct$foo_anon.7" = linkonce constant %.introspect { i8 11, i64 16, i64 0, i64 2, [0 x i64] zeroinitializer }, align 8
@"ct$foo_Matrix2x2_b" = linkonce constant %.introspect { i8 10, i64 16, i64 0, i64 1, [0 x i64] zeroinitializer }, align 8
@.__const = private unnamed_addr constant %Matrix2x2 { %anon { %anon.0 { float 1.000000e+00, float 2.000000e+00, float 3.000000e+00, float 4.000000e+00 } } }, align 4
@.__const.8 = private unnamed_addr constant %Matrix2x2_b { %anon.1 { [4 x float] [float 1.000000e+00, float 2.000000e+00, float 3.000000e+00, float 4.000000e+00] } }, align 4
@.str = private unnamed_addr constant [13 x i8] c"%f %f %f %f\0A\00", align 1

; Function Attrs: nounwind
define void @foo_main() #0 {
entry:
  %m = alloca %Matrix2x2, align 4
  %m2 = alloca %Matrix2x2_b, align 4
  call void @llvm.memcpy.p0.p0.i32(ptr align 4 %m, ptr align 4 @.__const, i32 16, i1 false)
  call void @llvm.memcpy.p0.p0.i32(ptr align 4 %m2, ptr align 4 @.__const.8, i32 16, i1 false)
  %0 = getelementptr inbounds %Matrix2x2, ptr %m, i32 0, i32 0
  %1 = getelementptr inbounds %anon.0, ptr %0, i32 0, i32 0
  %2 = load float, ptr %1, align 4
  %fpfpext = fpext float %2 to double
  %3 = getelementptr inbounds %Matrix2x2, ptr %m, i32 0, i32 0
  %4 = getelementptr inbounds [4 x float], ptr %3, i64 0, i64 1
  %5 = load float, ptr %4, align 4
  %fpfpext1 = fpext float %5 to double
  %6 = getelementptr inbounds %Matrix2x2, ptr %m, i32 0, i32 0
  %7 = getelementptr inbounds %anon.0, ptr %6, i32 0, i32 2
  %8 = load float, ptr %7, align 4
  %fpfpext2 = fpext float %8 to double
  %9 = getelementptr inbounds %Matrix2x2, ptr %m, i32 0, i32 0
  %10 = getelementptr inbounds [4 x float], ptr %9, i64 0, i64 3
  %11 = load float, ptr %10, align 4
  %fpfpext3 = fpext float %11 to double
  %12 = call i32 (ptr, ...) @printf(ptr @.str, double %fpfpext, double %fpfpext1, double %fpfpext2, double %fpfpext3)
  ret void
}