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
|
; RUN: llc < %s -march=x86-64 -enable-unsafe-fp-math | FileCheck %s
define double @exact(double %x) {
; Exact division by a constant converted to multiplication.
; CHECK: @exact
; CHECK: mulsd
%div = fdiv double %x, 2.0
ret double %div
}
define double @inexact(double %x) {
; Inexact division by a constant converted to multiplication.
; CHECK: @inexact
; CHECK: mulsd
%div = fdiv double %x, 0x41DFFFFFFFC00000
ret double %div
}
define double @funky(double %x) {
; No conversion to multiplication if too funky.
; CHECK: @funky
; CHECK: divsd
%div = fdiv double %x, 0.0
ret double %div
}
define double @denormal1(double %x) {
; Don't generate multiplication by a denormal.
; CHECK: @denormal1
; CHECK: divsd
%div = fdiv double %x, 0x7FD0000000000001
ret double %div
}
define double @denormal2(double %x) {
; Don't generate multiplication by a denormal.
; CHECK: @denormal
; CHECK: divsd
%div = fdiv double %x, 0x7FEFFFFFFFFFFFFF
ret double %div
}
|
