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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -verify-machineinstrs -mtriple=powerpc64le-linux-gnu | FileCheck %s
define float @can_fma_with_fewer_uses(float %f1, float %f2, float %f3, float %f4) {
; CHECK-LABEL: can_fma_with_fewer_uses:
; CHECK: # %bb.0:
; CHECK-NEXT: xsmulsp 0, 1, 2
; CHECK-NEXT: fmr 1, 0
; CHECK-NEXT: xsmaddasp 1, 3, 4
; CHECK-NEXT: xsdivsp 1, 0, 1
; CHECK-NEXT: blr
%mul1 = fmul contract float %f1, %f2
%mul2 = fmul contract float %f3, %f4
%add = fadd contract float %mul1, %mul2
%second_use_of_mul1 = fdiv float %mul1, %add
ret float %second_use_of_mul1
}
; There is no contract on the mul with no extra use so we can't fuse that.
; Since we are fusing with the mul with an extra use, the fmul needs to stick
; around beside the fma.
define float @no_fma_with_fewer_uses(float %f1, float %f2, float %f3, float %f4) {
; CHECK-LABEL: no_fma_with_fewer_uses:
; CHECK: # %bb.0:
; CHECK-NEXT: xsmulsp 0, 1, 2
; CHECK-NEXT: fmr 1, 0
; CHECK-NEXT: xsmaddasp 1, 3, 4
; CHECK-NEXT: xsdivsp 1, 0, 1
; CHECK-NEXT: blr
%mul1 = fmul contract float %f1, %f2
%mul2 = fmul float %f3, %f4
%add = fadd contract float %mul1, %mul2
%second_use_of_mul1 = fdiv float %mul1, %add
ret float %second_use_of_mul1
}
|
