1; RUN: llc < %s -enable-unsafe-fp-math -mtriple=x86_64-apple-darwin -mcpu=corei7-avx | FileCheck %s
2
3
4; rdar://13126763
5; Expression "x + x*x" was mistakenly transformed into "x * 3.0f".
6
7define float @test1(float %x) {
8  %t1 = fmul fast float %x, %x
9  %t2 = fadd fast float %t1, %x
10  ret float %t2
11; CHECK: test1
12; CHECK: vaddss
13}
14
15; (x + x) + x => x * 3.0
16define float @test2(float %x) {
17  %t1 = fadd fast float %x, %x
18  %t2 = fadd fast float %t1, %x
19  ret float %t2
20; CHECK: .long  1077936128
21; CHECK: test2
22; CHECK: vmulss LCPI1_0(%rip), %xmm0, %xmm0
23}
24
25; x + (x + x) => x * 3.0
26define float @test3(float %x) {
27  %t1 = fadd fast float %x, %x
28  %t2 = fadd fast float %t1, %x
29  ret float %t2
30; CHECK: .long  1077936128
31; CHECK: test3
32; CHECK: vmulss LCPI2_0(%rip), %xmm0, %xmm0
33}
34
35; (y + x) + x != x * 3.0
36define float @test4(float %x, float %y) {
37  %t1 = fadd fast float %x, %y
38  %t2 = fadd fast float %t1, %x
39  ret float %t2
40; CHECK: test4
41; CHECK: vaddss
42}
43
44; rdar://13445387
45; "x + x + x => 3.0 * x" should be disabled after legalization because
46; Instruction-Selection doesn't know how to handle "3.0"
47;
48define float @test5() {
49  %mul.i.i151 = fmul <4 x float> zeroinitializer, zeroinitializer
50  %vecext.i8.i152 = extractelement <4 x float> %mul.i.i151, i32 1
51  %vecext1.i9.i153 = extractelement <4 x float> %mul.i.i151, i32 0
52  %add.i10.i154 = fadd float %vecext1.i9.i153, %vecext.i8.i152
53  %vecext.i7.i155 = extractelement <4 x float> %mul.i.i151, i32 2
54  %add.i.i156 = fadd float %vecext.i7.i155, %add.i10.i154
55  ret float %add.i.i156
56}
57