1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple x86_64-w64-mingw32 %s -o - | FileCheck %s
declare void @foo(ptr byval({ float, double }))
@G = external constant { float, double }
define void @bar() {
; Make sure we're creating a temporary stack slot, rather than just passing
; the pointer through unmodified.
; CHECK-LABEL: bar:
; CHECK: # %bb.0:
; CHECK-NEXT: subq $56, %rsp
; CHECK-NEXT: .seh_stackalloc 56
; CHECK-NEXT: .seh_endprologue
; CHECK-NEXT: movq .refptr.G(%rip), %rax
; CHECK-NEXT: movq (%rax), %rcx
; CHECK-NEXT: movq 8(%rax), %rax
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %rcx
; CHECK-NEXT: callq foo
; CHECK-NEXT: nop
; CHECK-NEXT: addq $56, %rsp
; CHECK-NEXT: retq
; CHECK-NEXT: .seh_endproc
call void @foo(ptr byval({ float, double }) @G)
ret void
}
define void @baz(ptr byval({ float, double }) %arg) {
; On Win64 the byval is effectively ignored on declarations, since we do
; pass a real pointer in registers. However, by our semantics if we pass
; the pointer on to another byval function, we do need to make a copy.
; CHECK-LABEL: baz:
; CHECK: # %bb.0:
; CHECK-NEXT: subq $56, %rsp
; CHECK-NEXT: .seh_stackalloc 56
; CHECK-NEXT: .seh_endprologue
; CHECK-NEXT: movq (%rcx), %rax
; CHECK-NEXT: movq 8(%rcx), %rcx
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %rcx
; CHECK-NEXT: callq foo
; CHECK-NEXT: nop
; CHECK-NEXT: addq $56, %rsp
; CHECK-NEXT: retq
; CHECK-NEXT: .seh_endproc
call void @foo(ptr byval({ float, double }) %arg)
ret void
}
declare void @foo2(ptr byval({ float, double }), ptr byval({ float, double }), ptr byval({ float, double }), ptr byval({ float, double }), ptr byval({ float, double }), i64 %f)
@data = external constant { float, double }
define void @test() {
; CHECK-LABEL: test:
; CHECK: # %bb.0:
; CHECK-NEXT: subq $136, %rsp
; CHECK-NEXT: .seh_stackalloc 136
; CHECK-NEXT: .seh_endprologue
; CHECK-NEXT: movq .refptr.G(%rip), %rax
; CHECK-NEXT: movq (%rax), %rcx
; CHECK-NEXT: movq 8(%rax), %rax
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq %rcx, {{[0-9]+}}(%rsp)
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %rax
; CHECK-NEXT: movq %rax, {{[0-9]+}}(%rsp)
; CHECK-NEXT: movq $10, {{[0-9]+}}(%rsp)
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %rcx
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %rdx
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %r8
; CHECK-NEXT: leaq {{[0-9]+}}(%rsp), %r9
; CHECK-NEXT: callq foo2
; CHECK-NEXT: nop
; CHECK-NEXT: addq $136, %rsp
; CHECK-NEXT: retq
; CHECK-NEXT: .seh_endproc
call void @foo2(ptr byval({ float, double }) @G, ptr byval({ float, double }) @G, ptr byval({ float, double }) @G, ptr byval({ float, double }) @G, ptr byval({ float, double }) @G, i64 10)
ret void
}
define i64 @receive_byval_arg_via_stack_arg(i64* byval(i64), i64* byval(i64), i64* byval(i64), i64* byval(i64), i64* byval(i64) %x) {
; CHECK-LABEL: receive_byval_arg_via_stack_arg:
; CHECK: # %bb.0:
; CHECK-NEXT: movq {{[0-9]+}}(%rsp), %rax
; CHECK-NEXT: movq (%rax), %rax
; CHECK-NEXT: retq
%r = load i64, i64* %x
ret i64 %r
}
|
