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
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
declare double @llvm.sqrt.f64(double) nounwind readnone speculatable
declare void @use(double)
; sqrt(a) * sqrt(b) no math flags
define double @sqrt_a_sqrt_b(double %a, double %b) {
; CHECK-LABEL: @sqrt_a_sqrt_b(
; CHECK-NEXT: [[TMP1:%.*]] = call double @llvm.sqrt.f64(double [[A:%.*]])
; CHECK-NEXT: [[TMP2:%.*]] = call double @llvm.sqrt.f64(double [[B:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul double [[TMP1]], [[TMP2]]
; CHECK-NEXT: ret double [[MUL]]
;
%1 = call double @llvm.sqrt.f64(double %a)
%2 = call double @llvm.sqrt.f64(double %b)
%mul = fmul double %1, %2
ret double %mul
}
; sqrt(a) * sqrt(b) fast-math, multiple uses
define double @sqrt_a_sqrt_b_multiple_uses(double %a, double %b) {
; CHECK-LABEL: @sqrt_a_sqrt_b_multiple_uses(
; CHECK-NEXT: [[TMP1:%.*]] = call fast double @llvm.sqrt.f64(double [[A:%.*]])
; CHECK-NEXT: [[TMP2:%.*]] = call fast double @llvm.sqrt.f64(double [[B:%.*]])
; CHECK-NEXT: [[MUL:%.*]] = fmul fast double [[TMP1]], [[TMP2]]
; CHECK-NEXT: call void @use(double [[TMP2]])
; CHECK-NEXT: ret double [[MUL]]
;
%1 = call fast double @llvm.sqrt.f64(double %a)
%2 = call fast double @llvm.sqrt.f64(double %b)
%mul = fmul fast double %1, %2
call void @use(double %2)
ret double %mul
}
; sqrt(a) * sqrt(b) => sqrt(a*b) with fast-math
define double @sqrt_a_sqrt_b_fast(double %a, double %b) {
; CHECK-LABEL: @sqrt_a_sqrt_b_fast(
; CHECK-NEXT: [[TMP1:%.*]] = fmul fast double [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = call fast double @llvm.sqrt.f64(double [[TMP1]])
; CHECK-NEXT: ret double [[TMP2]]
;
%1 = call fast double @llvm.sqrt.f64(double %a)
%2 = call fast double @llvm.sqrt.f64(double %b)
%mul = fmul fast double %1, %2
ret double %mul
}
; sqrt(a) * sqrt(b) * sqrt(c) * sqrt(d) => sqrt(a*b*c+d) with fast-math
define double @sqrt_a_sqrt_b_sqrt_c_sqrt_d_fast(double %a, double %b, double %c, double %d) {
; CHECK-LABEL: @sqrt_a_sqrt_b_sqrt_c_sqrt_d_fast(
; CHECK-NEXT: [[TMP1:%.*]] = fmul fast double [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = fmul fast double [[TMP1]], [[C:%.*]]
; CHECK-NEXT: [[TMP3:%.*]] = fmul fast double [[TMP2]], [[D:%.*]]
; CHECK-NEXT: [[TMP4:%.*]] = call fast double @llvm.sqrt.f64(double [[TMP3]])
; CHECK-NEXT: ret double [[TMP4]]
;
%1 = call fast double @llvm.sqrt.f64(double %a)
%2 = call fast double @llvm.sqrt.f64(double %b)
%mul = fmul fast double %1, %2
%3 = call fast double @llvm.sqrt.f64(double %c)
%mul1 = fmul fast double %mul, %3
%4 = call fast double @llvm.sqrt.f64(double %d)
%mul2 = fmul fast double %mul1, %4
ret double %mul2
}
|
