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
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple x86_64 < %s | FileCheck %s
; To ensure unused floating point constant is correctly removed
define float @test(float %src, float* %p) {
; CHECK-LABEL: test:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movq $0, (%rdi)
; CHECK-NEXT: xorps %xmm0, %xmm0
; CHECK-NEXT: retq
entry:
%a0 = getelementptr inbounds float, float* %p, i32 0
%a1 = getelementptr inbounds float, float* %p, i32 1
store float 0.000000e+00, float* %a0
store float 0.000000e+00, float* %a1
%zero = load float, float* %a0
%fmul1 = fmul fast float %zero, %src
%fadd1 = fadd fast float %fmul1, %zero
%fmul2 = fmul fast float %fadd1, 2.000000e+00
%fmul3 = fmul fast float %fmul2, %fmul2
%fmul4 = fmul fast float %fmul2, 2.000000e+00
%fadd2 = fadd fast float %fmul4, -3.000000e+00
%fmul5 = fmul fast float %fadd2, %fmul2
%fadd3 = fadd fast float %fmul2, %src
%fadd4 = fadd fast float %fadd3, %fmul5
%fmul6 = fmul fast float %fmul3, %fadd4
ret float %fmul6
}
; To ensure negated result will not be removed when NegX=NegY and
; NegX is needed
define float @test2(float %x, float %y) {
; CHECK-LABEL: test2:
; CHECK: # %bb.0:
; CHECK-NEXT: movaps %xmm1, %xmm0
; CHECK-NEXT: mulss {{\.?LCPI[0-9]+_[0-9]+}}(%rip), %xmm0
; CHECK-NEXT: retq
%add = fadd fast float %x, 750.0
%sub = fsub fast float %x, %add
%mul = fmul fast float %sub, %sub
%mul2 = fmul fast float %mul, %sub
%add2 = fadd fast float %mul2, 1.0
%add3 = fadd fast float %mul2, %add2
%mul3 = fmul fast float %y, %add3
ret float %mul3
}
|
