1 ; RUN: llc < %s -x86-use-vzeroupper -mtriple=x86_64-apple-darwin -mattr=+avx | FileCheck %s
4 declare <4 x float> @do_sse(<4 x float>)
5 declare <8 x float> @do_avx(<8 x float>)
6 declare <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float>, i8) nounwind readnone
7 @x = common global <4 x float> zeroinitializer, align 16
8 @g = common global <8 x float> zeroinitializer, align 32
10 ;; Basic checking - don't emit any vzeroupper instruction
13 define <4 x float> @test00(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp {
15 ; CHECK-NOT: vzeroupper
16 %add.i = fadd <4 x float> %a, %b
17 %call3 = call <4 x float> @do_sse(<4 x float> %add.i) nounwind
19 ret <4 x float> %call3
22 ;; Check parameter 256-bit parameter passing
25 define <8 x float> @test01(<4 x float> %a, <4 x float> %b, <8 x float> %c) nounwind uwtable ssp {
27 %tmp = load <4 x float>, <4 x float>* @x, align 16
29 ; CHECK-NEXT: callq _do_sse
30 %call = tail call <4 x float> @do_sse(<4 x float> %tmp) nounwind
31 store <4 x float> %call, <4 x float>* @x, align 16
32 ; CHECK-NOT: vzeroupper
33 ; CHECK: callq _do_sse
34 %call2 = tail call <4 x float> @do_sse(<4 x float> %call) nounwind
35 store <4 x float> %call2, <4 x float>* @x, align 16
40 ;; Check that vzeroupper is emitted for tail calls.
43 define <4 x float> @test02(<8 x float> %a, <8 x float> %b) nounwind uwtable ssp {
45 %add.i = fadd <8 x float> %a, %b
46 %add.low = call <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float> %add.i, i8 0)
49 %call3 = tail call <4 x float> @do_sse(<4 x float> %add.low) nounwind
50 ret <4 x float> %call3
53 ;; Test the pass convergence and also that vzeroupper is only issued when necessary,
54 ;; for this function it should be only once
57 define <4 x float> @test03(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp {
59 %add.i = fadd <4 x float> %a, %b
63 %call = tail call i32 @foo()
64 %tobool = icmp eq i32 %call, 0
65 br i1 %tobool, label %for.body, label %while.cond
69 ; CHECK-NOT: vzeroupper
70 %i.018 = phi i32 [ 0, %while.cond ], [ %1, %for.body ]
71 %c.017 = phi <4 x float> [ %add.i, %while.cond ], [ %call14, %for.body ]
72 ; CHECK: callq _do_sse
73 %call5 = tail call <4 x float> @do_sse(<4 x float> %c.017) nounwind
74 ; CHECK-NEXT: callq _do_sse
75 %call7 = tail call <4 x float> @do_sse(<4 x float> %call5) nounwind
76 %tmp11 = load <8 x float>, <8 x float>* @g, align 32
77 %0 = tail call <4 x float> @llvm.x86.avx.vextractf128.ps.256(<8 x float> %tmp11, i8 1) nounwind
79 ; CHECK-NEXT: callq _do_sse
80 %call14 = tail call <4 x float> @do_sse(<4 x float> %0) nounwind
81 %1 = add nsw i32 %i.018, 1
82 %exitcond = icmp eq i32 %1, 4
83 br i1 %exitcond, label %for.end, label %for.body
86 ret <4 x float> %call14
89 ;; Check that we also perform vzeroupper when we return from a function.
92 define <4 x float> @test04(<4 x float> %a, <4 x float> %b) nounwind uwtable ssp {
94 %shuf = shufflevector <4 x float> %a, <4 x float> %b, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7>
95 ; CHECK-NOT: vzeroupper
97 %call = call <8 x float> @do_avx(<8 x float> %shuf) nounwind
98 %shuf2 = shufflevector <8 x float> %call, <8 x float> undef, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
101 ret <4 x float> %shuf2