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
|
; RUN: llc < %s -mtriple=i686-- | grep fldz
; RUN: llc < %s -mtriple=x86_64-- | grep fld1
%0 = type { x86_fp80, x86_fp80 }
; This is basically this code on x86-64:
; _Complex long double test() { return 1.0; }
define %0 @test() {
%A = fpext double 1.0 to x86_fp80
%B = fpext double 0.0 to x86_fp80
%mrv = insertvalue %0 undef, x86_fp80 %A, 0
%mrv1 = insertvalue %0 %mrv, x86_fp80 %B, 1
ret %0 %mrv1
}
;_test2:
; fld1
; fld %st(0)
; ret
define %0 @test2() {
%A = fpext double 1.0 to x86_fp80
%mrv = insertvalue %0 undef, x86_fp80 %A, 0
%mrv1 = insertvalue %0 %mrv, x86_fp80 %A, 1
ret %0 %mrv1
}
; Uses both values.
define void @call1(x86_fp80 *%P1, x86_fp80 *%P2) {
%a = call %0 @test()
%b = extractvalue %0 %a, 0
store x86_fp80 %b, x86_fp80* %P1
%c = extractvalue %0 %a, 1
store x86_fp80 %c, x86_fp80* %P2
ret void
}
; Uses both values, requires fxch
define void @call2(x86_fp80 *%P1, x86_fp80 *%P2) {
%a = call %0 @test()
%b = extractvalue %0 %a, 1
store x86_fp80 %b, x86_fp80* %P1
%c = extractvalue %0 %a, 0
store x86_fp80 %c, x86_fp80* %P2
ret void
}
; Uses ST(0), ST(1) is dead but must be popped.
define void @call3(x86_fp80 *%P1, x86_fp80 *%P2) {
%a = call %0 @test()
%b = extractvalue %0 %a, 0
store x86_fp80 %b, x86_fp80* %P1
ret void
}
; Uses ST(1), ST(0) is dead and must be popped.
define void @call4(x86_fp80 *%P1, x86_fp80 *%P2) {
%a = call %0 @test()
%c = extractvalue %0 %a, 1
store x86_fp80 %c, x86_fp80* %P2
ret void
}
|
